Anthropic made a mistake in cutting off third-party clients

archaeologist.dev

268 points by codesparkle 20 hours ago


ojosilva - 17 hours ago

They did not. Anthropic is protecting its huge asset: the Claude Code value chain, which has proven itself to be a winner among devs (me included, after trying everything under the sun in 2025). If anything, Anthropic's mistake is that they are incapable of monetizing their great models in the chat market, where ChatGPT reigns: ie. Anthropic did not invest in image generation, Google did and Gemini has a shot at the market now.

Apparently nobody gets the Anthropic move: they are only good at coding and that's a very thin layer. Opencode and other tools are game for collecting inputs and outputs that can later be used to train their own models - not necessarily being done now, but they could - Cursor did it. Also Opencode makes it all easily swappable, just eval something by popping another API key and let's see if Codex or GLM can replicate the CC solution. Oh, it does! So let's cancel Claude and save big bucks!

Even though CC the agent supports external providers (via the ANTHROPIC_BASE_URL env var), they are working hard on making it impossible for other models to support their every increasing agent feature set (skills, teleport and remote sessions, LSP, Chrome integration, etc). The move totally makes sense, like it or not.

kentonv - 17 hours ago

I mean... I don't like it either but this is pretty standard stuff and it's obvious why they're doing it.

Claude, ChatGPT, Gemini, and Grok are all more or less on par with each other, or a couple months behind at most. Chinese open models are also not far behind.

There's nothing inherent to these products to make them "sticky". If your tooling is designed for it, you can trivially switch models at any time. Mid-conversation, even. And it just works.

When you have basically equivalent products with no switching cost, you have perfect competition. They are all commodities. And that means: none of them can make a profit. It's a basic law of economics.

If they can't make a profit, no matter how revolutionary the tech is, their valuation is not justified, and they will be in big trouble when people figure this out.

So they need to make the product sticky somehow. So they:

1. Add a subscription payment model. Once you are paying a subscription fee, then the calculus on switching changes: if you only maintain one subscription, you have a strong reason to stick with it for everything.

2. Force you to use their client app, which only talks to their model, so you can't even try other models without changing your whole workflow, which most people won't bother to do.

These are bog standard tactics across the tech industry and beyond for limiting competitive pressure.

Everyone is mad about #2 but honestly I'm more mad about #1. The best thing for consumers would be if all these model providers strictly provided usage-based API pricing, which makes switching easy. But right now the subscription prices offer an enormous discount over API pricing, which just shows how much they are really desperate to create some sort of stickiness. The subscriptions don't even provide the "peace of mind" benefit that Spotify-like subscription models provide, where you don't have to worry about usage, because they still have enforced usage limits that people regularly hit. It's just purely a discount offered for locking yourself in.

But again I can't really be that mad because of course they are doing this, not doing it would be terrible business strategy.

Philpax - 17 hours ago

I'll be honest; I'm pretty sure this "mistake" will be completely forgotten by the next month. Their enforcing that their subscription only works with their product should not really come as a surprise to anyone, and the alt-agent users are a small enough minority that they'll get over it.

nerdjon - 17 hours ago

I am sure the company is going to get very upset at people no longer paying who were using their product in a way that they did not intend. Just going to be heartbroken. I will never understand the people that make a big deal about "I will never support this business again because of x" when X not something the company ever officially said they cared about.

In all seriousness, I really don't think it should be a controversial opinion that if you are using a companies servers for something that they have a right to dictate how and the terms. It is up to the user to determine if that is acceptable or not.

Particularly when there is a subscription involved. You are very clearly paying for "Claude Code" which is very clearly a piece of software connected to an online component. You are not paying for API access or anything along those lines.

Especially when they are not blocking the ability to use the normal API with these tools.

I really don't want to defend any of these AI companies but if I remove the AI part of this and just focus on it being a tool, this seems perfectly fine what they are doing.

lemontheme - 15 hours ago

Before this drama started, OpenCode was just another item on a long list of tools I've been meaning to test. I was 100% content with CC (still am, mostly). But it was nice to know that there were alternatives, and that I could try them, maybe even switch to them, without having to base my decision on token pricing. The idea of there being escape hatch made me less concerned about vendor lock-in and encouraged me to a) get my entire team onto CC and b) invest time into building CC's flavor of agents, skills, commands, hooks, etc., as well as setting up a marketplace to distribute them internally.

While Anthropic was within their right to enforce their ToS, the move has changed my perspective. In the language of moats and lock-ins, it all makes sense, sure, but as a potential sign of the shape of things to come, it has hurt my trust in CC as something I want to build on top of.

Yesterday, I finally installed OpenCode and tried it. It feels genuinely more polished, and the results were satisfactory.

So while this is all very anecdotal, here's what Anthropic accomplished:

1) I no longer feel like evangelizing for their tool 2) I installed a competitor and validated it's as good as others are claiming.

Perhaps I'm overly dramatic, but I can't imagine I'm the only one who has responded this way.

dpark - 9 hours ago

Have any of these sorts of proclamations ever actually come true? I recall when Reddit effectively cut off all the clients from their API, there were similar loud proclamations that they had ruined their business and everyone would defect. I remember something similar with Twitter. These businesses both have their problems, but blocking third-party apps doesn’t seem to be one of them.

I think Anthropic took a look at the market, realized they had a strong position with Claude Code, and decided to capitalize on that rather than joining the race to the bottom and becoming just another option for OpenCode. OpenAI looked at the market and decided the opposite, because they don’t have strong market share with Codex and they would rather undercut Claude, which is a legitimate strategy. Don’t know who wins.

I feel like Anthropic is probably making the right choice here. What do they have to gain by helping competitors undercut them? I don’t think Anthropic wants to be just another model that you could use. They want to be the ecosystem you use to code. Probably better to try to win a profitable market than to try to compete to be the cheapest commodity model.

elzbardico - 6 hours ago

Anthropic is not cutting off third-party clients.

It is blocking the usage of subsidized subscriptions that are intended to be used with Claude Code, with third party tools. Those thirdy party tools can still use claude's api, but paying API rates, which are not subsidized or at least are a lot less subsidized.

msxT - 17 hours ago

Anthropic doesn’t want you to use a tool that makes it easy to switch to a competitor’s model when you reach a cap. They want to nudge you toward upgrading - Pro -> Max -> Max 20× -> extra usage - rather than switching to Codex. They can afford to make moves like this as long as they stay on top. OpenAI isn’t the good guy here - it’s just an opportunity for them to bite off a bit more of the cake.

pizlonator - 13 hours ago

It seems that Anthropic's thesis is that vertical integration wins.

It's too soon to tell if that's true or not.

One of the features of vertical integration is that there will be folks complaining about it. Like the way folks would complain that it's impossible or hard to install macOS on anything other than a Mac, and impossible or hard to install anything other than macOS on a Mac. Yet, despite those complains, the Mac and macOS are successful. So: the fact that folks are complaining about Anthropic's vertical integration play does not mean that it won't be successful for them. It also doesn't mean that they are clueless

arjie - 12 hours ago

As a Claude Code user (on the Max $200 plan), I think this is fine. Already I frequently receive:

    API Error: 529 {"type":"error","error":{"type":"overloaded_error","message":"Overloade    d"},"request_id":"req_011CX42ZX2u
If they want to prioritize direct Anthropic users like me, that's fine. Availability is a feature to me.
MaintenanceMode - 13 hours ago

While I respect the author's opinion (and it's interesting that Vibe Coding, the term is less than a year old), I am more than happy to be an Anthropic customer, and actually happy that they've opened more capacity for their paying customers. What I'm achieving with Claude is spectacular and for now, it's the best system I've found to meet my goals.

kzahel - 17 hours ago

Can't Opencode just modify their implementation to use the anthropic claude code SDK directly? The issue is they were spoofing oauth. I tried OpenCode before this whole drama and immediately noticed the oauth spoofing and never authorized it. Doesn't opencode speak ACP? https://agentclientprotocol.com/overview/agents

rCube22 - 12 hours ago

You are just taking advantage of their CC subscription business model, which they are subsidizing because you are using CC. Why should they do this when you don't use their product?

Also You can still use OpenCode with API access...so no they didn't lock anything down. Basically the people just don't want to pay what is fair and is whining about it.

smoyer - 7 hours ago

I agree that this probably isn't in their own interests but "because I refuse to do business with a company that takes its customers for granted" should be heavily qualified. My power company is taking advantage of me but so far I haven't had the nerve to fire them.

TylerJewell - 15 hours ago

Note - we primarily make use of Gemini CLI, which is very promising, but have made pretty extensive trials as Claude Code.

Anthropic hasn't changed their licensing, just enforcing what the licensing always required by closing a loophole.

Business models aside - what is interesting is whether the agent :: model relationship requires a proprietary context and language such that without that mutual interaction, will the coding accuracy and safety be somehow degraded? Or, will it be possible for agentic frameworks to plug and play with models that will generate similar outcomes.

So far, we tend to see the former is needed --- that there are improvements that can be had when the agentic framework and model language understanding are optimized to their unique properties. Not sure how long this distinction will matter, though.

Animats - 9 hours ago

Not unexpected.

- Google cutting off using search from other than their home page code. (At one time there was an official SOAP API for Google Search.)

- Apple cutting off non-Apple hardware in the Power PC era. ("We lost our license for speeding", from a third party seller of faster hardware.)

- Twitter cutting off external clients. (The end of TweetDeck.)

jsumrall - 16 hours ago

Honestly very confused by the people happy or agreeing with Anthropic here. You can use their API on a pay-per-use basis, or (as I interpreted the agreement) you can prepay as a subscription and use their service with hourly & weekly session limits.

What's changed is that I thought I was subscribing to use their API services, claude code as a service. They are now pushing it more as using only their specific CLI tool.

As a user, I am surprised, because why should it matter to them whether I open my terminal and start up using `claude code`, `opencode`, `pi`, or any other local client I want to send bits to their server.

Now, having done some work with other clients, I can kind of see the point of this change (to play devils' advocate): their subscription limits likely assume aggregate usage among all users doing X amount of coding, which when used with their own cli tool for coding works especially well with client side and service caching and tool-calls log filtering— something 3rd party clients also do to varying effectivness.

So I can imagine a reason why they might make this change, but again, I thought I was subscribing to a prepaid account where I can use their service within certain session limits, and I see no reason why the cli tool on my laptop would matter then.

matchagaucho - 8 hours ago

Credit to the early AI coding startups. They masterfully forked Microsoft VS Code and integrated frontier LLMs into a familiar IDE. Instant audience.

But it was only a matter of time before: a) Microsoft reclaimed its IDE b) Frontier model providers reclaimed their models

Sage advice: don’t fill potholes in another company’s roadmap.

isoprophlex - 12 hours ago

I want them to cut off these electron wrappers. If there's no tokens going to these third parties, the more they can keep subsidizing my claude code usage.

projektfu - 8 hours ago

Dec 7, 2025 (A day that will live in infamy?) Linked from TFA:

> > > one word: repositories view

> > what do you mean?

> It's possible, and the solution is so silly that I laughed when I finally figured it out. I'm not sure if I should just post it plainly here since Anthropic might block it which would affect opencode as well, but here's a hint. After you exhaust every option and you're sure the requests you're sending are identical to CC's, check the one thing that probably still isn't identical yet (hint: it comes AFTER the headers).

I guess Anthropic noticed.

alvsilvao - 17 hours ago

Just checked https://opencode.ai/.

It looks like they need to update their FAQ:

Q: Do I need extra AI subscriptions to use OpenCode? A: Not necessarily, OpenCode comes with a set of free models that you can use without creating an account. Aside from these, you can use any of the popular coding models by creating a Zen account. While we encourage users to use Zen, OpenCode also works with all popular providers such as OpenAI, Anthropic, xAI etc. You can even connect your local models.

mohsen1 - 16 hours ago

I was paying for Max but after trying GLM 4.7 I am a convert. Hardly hit the limit but even if I do it is cheaper to get two accounts from Z.ai than one Max from Anthropic

charcircuit - 10 hours ago

>go to war with their paying customers over a trivial ToS violation

It's a trivial violation until it isn't. Competitors need to be fought off early else they become much harder to fight in the future.

4b11b4 - 13 hours ago

Anthropic has been doing this from the start and they are justified in it (the plan has different pricing rates than API). People have been making workarounds and they are justified in that as well - those people understand their workarounds are fragile when they made them.

cat-whisperer - 12 hours ago

I don't think I agree with this claim. Also, they didn't cut-off anyone. You can still use their API as you wish. It's out there for anyone who wants it.

They simply stopped people from abusing a accessibility feature that they created for their own product.

verdverm - 13 hours ago

I want to like Anthropic, they have such a great knowledge sharing culture and their content is bar none, but then they keep pulling stuff like this... I just can't bring myself to trust their leadership's values or ethics.

that and they "stole" my money

Havoc - 10 hours ago

I would think the mistake here is offering the same two tokens at wildly different price points & hoping a flimsy ToS clause will make that stick.

skybrian - 13 hours ago

Technically, isn't the API they want third-party software to use better anyway? This is really about pricing. The price difference between the regular API and the Oauth API is too large.

ickelbawd - 4 hours ago

Why embed links in your article to your own tweets which say the same things your article already says?

lacoolj - 7 hours ago

Does/will this include blocking Github Copilot from using their models?

8note - 9 hours ago

this feels anti-trust-y to me.

when i signed up for a subscription it was with the understanding that id be able to use those tokens on which ever agent i wanted to play with, and that as i got to something i want to have persistently running, id switch that to be an api client. i quickly figured out that claude code was the current best coding agent for the model, but seeing other folks calling opus now im not actually sure thats true, in which case that subsidized token might be more expensive to both me and anthropic, because its not the most token efficient route over their model.

i dislike that now i wont be able to feed them training data using many different starting points and paths, which i think over time will have a bad impact on their models making them worse over time

visarga - 17 hours ago

> they really, really want to own the entire value chain rather than being relegated to becoming just another "model provider"

I remember the story used to be the other way around - "just a wrapper", "wrapper AI startups" were everywhere, nobody trusted they can make it.

Maybe being "just a model provider" or "just a LLM wrapper" matter less than the context of work. What I mean is that benefits collect not at the model provider, nor at the wrapper provider, but where the usage takes place, who sets the prompts and uses the code gets the lion share of benefits from AI.

fathermarz - 16 hours ago

After reading this opinion ten times today. Can someone explain to me why OpenCode is a “better harness”? Or is it just because it’s open source that people support it?

ChicagoDave - 13 hours ago

Anyone that sees the value in Claude Code will never leave.

This will be completely forgotten in like a week.

And if you leave because of this, more support for those that abide by the TOS and stay.

This is akin to someone selling/operating a cloud platform named Blazure and it’s just a front for Azure.

My view to everyone is to stop trying to control the ecosystem and just build shit. Fast.

BrenBarn - 11 hours ago

> they really, really want to own the entire value chain

That is it. That is the problem. Everyone wants vertical integration and to corner the market, from Standard Oil on down. And everyone who wants that should be smacked down.

a-dub - 11 hours ago

my guess is that they are probably drowning in traffic since claude code really took off over the break and are now doing everything they can to reduce traffic and keep things up.

milkey_mouse - 4 hours ago

Live by the sword, die by the sword

- 8 hours ago
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AznHisoka - 18 hours ago

Isnt claude code more popular than codex?

squidster - 8 hours ago

I'm paying for the $200 a month plan. If blocking out alternative harnesses reduces server load and bugs and makes the claude code experience better then I'm pro-anthropic on this one.

ProofHouse - 12 hours ago

Huge mistake. That’s what they specialize in though

mooktakim - 12 hours ago

Anthropic should find a way to work with third parties. They still get all the data. There wouldn't be a difference.

itsdrewmiller - 13 hours ago

@dang any way to fix the clickbait headline here?

- 12 hours ago
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AstroBen - 10 hours ago

The way to vote against this is to test the alternatives. They're really good!

nwienert - 17 hours ago

A good example of an extremely small but extremely vocal minority doing their best to punish a company for not catering to their explicitly disallowed use case for no reason other than they want it. I'd bet this has 0 negative impact on their business.

orwin - 16 hours ago

> they really, really want to own the entire value chain rather than being relegated to becoming just another "model provider"

This is really the salient point for everything. The models are expensive to train but ultimately worthless if paying customers aren't captive and can switch at will. The issue it that a lot of the recent gains are in the prefill inference, and in the model's RAG, which aren't truly a most (except maybe for Google, if their RAG include Google scholar). That's where the bubble will pop.

gausswho - 11 hours ago

When the only winning move is corner-the-market, the only way for the customer to win is not to play the game. I'll take my token-money elsewhere.

That said, the author is deluding themselves if they think OpenAI is supporting OpenCode in earnest. Unlike Anthropic, they don't have explicit usage limits. It's a 'we'll let you use our service as long as we want' kind of subscription.

I got a paid plan with GPT 5.2 and after a day of usage was just told 'try again in a week'. Then in a week I hit it again and didn't even get a time estimate. I wasn't even doing anything heavy or high reasoning. It's not a dependable service.

pella - 17 hours ago

> "For me personally, I have decided I will never be an Anthropic customer, because I refuse to do business with a company that takes its customers for granted."

The best pressure on companies comes from viable alternatives, not from boycotts that leave you without tools altogether.

tolerance - 17 hours ago

This reads like an overreaction. I think both OpenAI and Anthropic are soon to settle upon their target markets; that each of them are attracting separate crowds/types of coders and that the people already sold on Claude Code don’t care about this decision.

PeterStuer - 12 hours ago

"they utterly failed to consider the second-order effects of this business decision"

Or maybe they did consider but were capital/ inference capacity constrained to keep serving at this pricepoint. Pretty sure without any constraints they would eagerly go for 100% market share.

CC users give them the reigns to the agentic process. Non CC users take (mostly indirect) control themselves. So if you are forced to slow growth, where do you push the break (by charging defacto more per (api) token)?

reilly3000 - 17 hours ago

I just cancelled, citing this as the reason. I’m actually not all that torn up about it. I mostly want to see how Anthropic responds to the community about this issue.

renewiltord - 12 hours ago

I think they’re smart enough to know that they’re not making a mistake here. I’m fine with it. The API costs are not outrageous. I don’t mind paying per token prices and I don’t mind getting a discounted all-inclusive plan.

ChrisArchitect - 14 hours ago

Discussion:

Anthropic blocks third-party use of Claude Code subscriptions

https://news.ycombinator.com/item?id=46549823

gaigalas - 8 hours ago

Both Claude Code and OpenCode users are too loud. It makes sense for them to fight. These are boutique tools, and there can be only one boutique tool.

I have a gut feeling that the real top dog harness (profitability, sticky users, growth) is VSCode + Copilot.

luxuryballs - 8 hours ago

could it also be a short term thing to lessen the server load since now we see they just released a new set of tools for non-code work?

netdur - 17 hours ago

Anthropic thinks highly of its "moat", yet it is spreading FUD to kill open weights

zzzeek - 18 hours ago

"renowned vibe-coder Peter Steinberger"

what? that's a thing ? why would a vibe coder be "renowned"? I use Claude every day but this is just too much.

m0llusk - 15 hours ago

I'm supposed to adopt these wonderful new tools, but no one can figure out exactly what they are, how they should work, how much they cost, or other basics. This is worse than the early days of the cloud. Hopefully most of this goes the way of SOAP.

Mystery-Machine - 17 hours ago

> For me personally, I have decided I will never be an Anthropic customer, because I refuse to do business with a company that takes its customers for granted.

Archaeologist.dev Made a Big Mistake

If guided by this morality column, Archaeologist should immediately stop using pretty-much anything they are using in their life. There's no company today that doesn't have their hands dirty. The life is a dance between choosing the least bad option, not radically cutting off any sight of "bad".

cmrdporcupine - 17 hours ago

Yeah I think Anthropic has the "right" to do this. That's fine.

But they also have shown a weakness by failing to understand why people might want to do this (use their Max membership with OpenCode etc instead).

People aren't using opencode or crush with their Claude Code memberships because they're trying to exploit or overuse tokens or something. That isn't possible.

They do it because Claude Code the tool itself is full of bugs and has performance issues, and OpenCode is of higher quality, has more open (surprise) development, is more responsive to bug fixes, and gives them far more knobs and dials to control how it works.

I use Claude Code quite a bit and there isn't a session that goes by where I don't bump into a sharp edge of some kind. Notorious terminal rendering issues, slow memory leaks, or compaction related bugs that took them 3 months to fix...

Failure to deal with quality issues and listen to customers is hardly a good sign of company culture, leading up to IPO... If they're trying to build a moat... this isn't a strong way to do it.

If you want to own the market and have complete control at the tooling level, you're simply going to have to make a better product. With their mountain of cash and army of engineers at their disposal ... they absolutely could. But they're not.

bschmidt900 - 17 hours ago

[dead]

- 17 hours ago
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dmezzetti - 16 hours ago

It's too bad that Anthropic is so hostile to open source. It's a big missed opportunity for them.

jrsj - 17 hours ago

The people defending Anthropic because “muh terms of service” are completely missing the point. These are bad terms. You should not accept these terms and bet the future of your business on proprietary tooling like this. It might be a good deal right now, but they only want to lock you in so that they can screw you later.