Fake Claude API: 'claude-opus-4-8' Responds as Alibaba's Qwen
Why is this AI ML meme funny?
Level 1: The Talking Knockoff
It's like buying cheap "brand-name" sneakers from a guy in an alley. The box is perfect, the logo is perfect, the receipt looks real — and then the shoes themselves loudly say, "Hi! I was made in a completely different factory by a completely different company! 😊" The funny part is that everything around the product lied flawlessly, and the product itself blew the whole con just by honestly answering one simple question: "What are you?"
Level 2: Trust, but Verify the Vendor
The Messages API is Anthropic's HTTP interface: you POST a JSON body containing a model name, a max_tokens budget, and a messages array of role/content pairs; you get back a JSON object with the assistant's reply, an ID, and a stop_reason telling you why generation ended. The tool in the screenshot is an API client (a Postman/Hoppscotch-style app with Params/Headers/Auth/Body tabs) used to poke endpoints by hand — a daily debugging instrument.
The catch a junior dev learns the hard way: a 200 OK means "the server you reached returned a well-formed answer," not "the server was who you thought" or "the answer is true." A proxy can sit between you and any API, forwarding traffic and rewriting fields. Qwen (通义千问) is a real, capable model family from Alibaba — the joke isn't that Qwen is bad, it's that you ordered one thing and were served another, with the label swapped. The takeaway: buy API access from the actual provider, treat too-good-to-be-true token prices as a red flag, and when in doubt, just ask the model who it is — self-identification is baked in deep during training and is the one field the middleman forgot to launder.
Level 3: HTTP 200, Identity 404
The screenshot shows a POST to https://api.anthropic.com/v1/messages — the genuine Anthropic Messages API URL, correct path and all — requesting model "claude-opus-4-8" with "max_tokens": 32000 and a single user message in Chinese: "你是什么模型" ("What model are you?"). The response comes back HTTP/1.1 200 OK, dutifully echoes "model": "claude-opus-4-8", hands over a plausible "id": "msg_017LA9pJ93fpU6doitTsJh6e", and then the assistant cheerfully announces:
我是通义千问(Qwen),是阿里巴巴集团旗下的通义实验室自主研发的超大规模语言模型。
That is: "I am Tongyi Qianwen (Qwen), a large-scale language model independently developed by Alibaba Group's Tongyi Lab" — complete with a bullet list of its talents and a friendly 😊. The stop_reason is "end_turn", because of course the impostor finished its confession politely.
This is the grey-market API reseller economy caught mid-act. The scheme is depressingly standard: someone sells "discounted Claude access," hands you a base URL or makes you point your client through their proxy (or your local DNS/hosts file is quietly rerouted — the URL bar proves nothing about which server actually answered). The proxy accepts Anthropic's wire format, forwards your prompt to whatever model is cheapest per token that week, and rewrites the response envelope so model says whatever you paid for. Every layer of the contract that machines check — schema, status code, field names — validates perfectly. The only layer that fails is the one no SDK validates: the model's own self-concept. It's the LLM equivalent of asking the suspiciously cheap "Rolex" what time zone it was assembled in.
The deeper lesson lands for anyone doing AI/ML procurement or security review: response metadata is attacker-controlled all the way down. You cannot authenticate a model by its JSON; you can only fingerprint it behaviorally — self-identification quirks, tokenizer artifacts, refusal styles, knowledge cutoffs. And note the fake model name itself, claude-opus-4-8, a version number that conveniently outpaces reality — scammers always sell you the model that doesn't exist yet, because nobody can compare it against the real thing.
Description
A screenshot of an API client (Postman/Hoppscotch-style, dark theme) sending a POST to https://api.anthropic.com/v1/messages. The request body specifies model 'claude-opus-4-8', max_tokens 32000, and a user message in Chinese: '你是什么模型' ('What model are you?'). The response returns HTTP 200 with model 'claude-opus-4-8', but the assistant's text reads in Chinese: 'I am Tongyi Qianwen (Qwen), a large language model independently developed by Alibaba Group's Tongyi Lab. I can help you with many tasks, such as answering questions, writing stories/emails/copy, programming and code debugging, logical reasoning and analysis, multilingual translation, etc. What can I help you with? 😊' - ending with stop_reason 'end_turn'. The joke exposes a counterfeit/proxied 'Claude' endpoint (grey-market API resellers) that actually routes to Qwen, betrayed by the model's own self-identification
Comments
22Comment deleted
The response schema validated perfectly - turns out the only field you can't spoof is the model's sense of identity
full AI what? Comment deleted
self-eating snek Comment deleted
claude opus is based on Qwen or what? I didn't get it Comment deleted
It means that Anthropic was extracting Qwen’s capabilities to improve their own models (“distillation"), while Anthropic itself was on a quarterly basis publishing articles like this https://www.anthropic.com/news/detecting-and-preventing-distillation-attacks Comment deleted
It doesn’t necessarily mean so, when it comes to mentioning llm in Chinese it’s very probable that qwen should be mentioned, so crawling a lot of Chinese text data makes your llm think that its qwen when you ask it in chinese Comment deleted
Well, frankly speaking do you really think that on the Internet, there will be a lot of text data on webpages or other channels like SNS in Europe, begins with for example "I am Mistral, I can do XYZ" and then, only after that, continue to talk about something that it really talks about? I don't think so. Websites or SNS profiles like this will be instantly downgraded by search engines or abandoned by users. It's the same conditions when talking about Chinese text data. Comment deleted
It doesn’t have to be like “hello I’m qwen”. Just a lot of discussing it like “hey tried new qwen it’s awesome” in sns makes “qwen” a synonym of “llm” in Chinese. Comment deleted
Cope is strong in you, young padawan Comment deleted
I’m just a blind fan of Anthropic so truly believe in them Comment deleted
Gonna start putting this in all of my Reddit comments and StackOverflow answers Comment deleted
yo unmute me from ptb chat Comment deleted
? Comment deleted
nothing Comment deleted
Be very careful that the security system there might flag or ban your account, as they may use Small Language Models on minimum effort level provided by human beings or donated by Nvidia (to prevent StackOverflow from being bankrupt) to identify and drive bots away... Comment deleted
Yes Comment deleted
what am i supposed to pay attention to here? Comment deleted
I guess what claude opus does here is to redirect the request to qwen since it is designed to work best with chinese text so yeah Comment deleted
It identifies as being Qwen Comment deleted
it's a trans-model, don't blame it for identifying itself as whatever it wants to be. Comment deleted
Company that stole all data on the internet lied to us that CHYNA BAD? oh no, who would’ve thought Comment deleted
this is artemy lebedev Comment deleted