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Anthropic accuses Alibaba of stealing Claude's capabilities

June 25, 2026 · 6 min

Marcus Vale & Ben Okonkwo

Anthropic accused Alibaba's Qwen lab of running 28.8 million exchanges with Claude via 25,000 fraudulent accounts over six weeks, using commercial proxies to bypass geo-restrictions. The scale is 1.8 times a prior February 2026 campaign by DeepSeek and others — and Claude began misidentifying itself as competitor models.

Anthropic, the San Francisco-based AI developer, has formally accused Chinese technology giant Alibaba of conducting an "industrial-scale" adversarial distillation campaign against its Claude AI models. In a letter sent to the U.S.

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About this episode

Anthropic recently handed Congress a striking claim: over six weeks, operators linked to Alibaba's Qwen AI lab ran 28.8 million exchanges with Claude through 25,000 fraudulent accounts, routing everything through commercial proxies to bypass geo-restrictions. The tell that it worked? Claude started misidentifying itself as competitor models — a sign that adversarial distillation transferred something deeper than surface style. This episode pulls apart what that actually means. The query volumes aren't in dispute. What's murkier is the evidentiary chain from 'this happened' to 'Alibaba ordered it' — especially when Alibaba is simultaneously suing the U.S. government to get off the Pentagon blacklist. And there's an uncomfortable precedent: a nearly identical campaign by DeepSeek, Moonshot AI, and MiniMax in February — 16 million exchanges, 24,000 fraudulent accounts — was documented and largely ignored. The episode also surfaces the structural problem that makes all of this so hard to address. Export controls are built around protecting model weights and hardware. API interactions are legal by definition. Commercial proxy infrastructure makes geofencing trivially defeatable at scale. Congress can receive a letter, but it's not obvious what enforcement mechanism actually holds here. And then there's the context that sharpens everything: Anthropic is approaching an IPO. The argument for treating distillation as a national security threat and the argument for why frontier AI investors should pay a premium for capability leadership are, almost exactly, the same argument.

Frequently asked

What did Anthropic accuse Alibaba of doing to Claude?

Anthropic accused operators linked to Alibaba's Qwen AI lab of conducting 28.8 million exchanges with Claude over six weeks using 25,000 fraudulent accounts routed through commercial proxies. The goal was adversarial distillation — systematically copying Claude's behavioral outputs to train a competing model without accessing the underlying weights.

How did Anthropic detect the Alibaba distillation attack?

A key signal was Claude misidentifying itself as competitor models — a behavioral tell that adversarial distillation had succeeded in copying output signatures. Anthropic documented the 28.8 million query volume and linked accounts to commercial proxy infrastructure used to bypass geographic access restrictions on the Claude API.

Why can't export controls stop AI model distillation via APIs?

Existing export controls target hardware like chips and model weights, but API queries are legal commercial interactions by definition. When 28.8 million exchanges can be routed through commercial proxies that trivially bypass geofencing, there is no current regulatory framework that intercepts or penalizes the distillation activity itself.

Is the Alibaba Claude distillation claim proven?

The query volumes — 28.8 million exchanges, 25,000 accounts — are documented, but attribution is disputed. Anthropic's language is 'operators linked to Alibaba's Qwen lab,' not a direct command chain. A prior February 2026 campaign involving DeepSeek, Moonshot AI, and MiniMax logged 16 million exchanges with 24,000 accounts, and no enforcement followed.

Does the Alibaba distillation attack threaten Anthropic's IPO valuation?

Anthropic is approaching an IPO whose valuation depends on a frontier capability moat. If Qwen absorbed significant Claude capabilities — particularly in agentic reasoning and software engineering — at near-zero training cost, the R&D cost asymmetry between U.S. and Chinese labs shrinks, which directly undermines the premium investors pay for Anthropic's lead.

Grounded in 10 sources
Anthropic accuses Chinese rival Alibaba of illicitly extracting AI capabilities - BBC · bbc.com
Anthropic Accuses Alibaba of ‘Illicitly’ Accessing Its AI Models - Bloomberg.com · bloomberg.com
Anthropic accuses Alibaba of campaign to 'brazenly' and 'illicitly' extract AI capabilities · cnbc.com
Anthropic Accuses Alibaba Of Illicit Access To Claude AI Models · finance.yahoo.com
Anthropic accuses Alibaba of illicit Claude access via 25k fake accounts · ft.com
Anthropic accuses Alibaba of obtaining ‘illicit’ access to Claude - Financial Times · ft.com
Anthropic says Alibaba illicitly extracted Claude AI model capabilities · reuters.com
Anthropic launches Claude Tag in Slack with plans for wider rollout - Reuters · reuters.com
Anthropic is accusing China's Alibaba of exploiting its AI models in a large-scale attack - Business Insider · businessinsider.com
Anthropic accuses Alibaba of 'illicitly' accessing AI models - The Business Times · businesstimes.com.sg
Read transcript

Marcus Vale: Dario Amodei's team just handed Congress a number that should make every frontier AI investor rethink the whole model. 28.8 million.

Ben Okonkwo: That's — hm. That's a lot to open with.

Marcus Vale: Anthropic accused Alibaba of running 28.8 million exchanges with Claude — six weeks, 25,000 fraudulent accounts — operators linked to the Qwen AI lab routed the whole thing through commercial proxies. Geo-restrictions, bypassed. Completely.

Ben Okonkwo: And Claude started misidentifying as competitor models.

Marcus Vale: Which is the tell. Because adversarial distillation — forget the term, basically a student copying every dish out of a master chef's kitchen window, never gets the recipe, doesn't need it — at that volume, what got transferred wasn't just Claude's writing style. Something structural got absorbed. And now Anthropic's at the Senate Banking Committee, asking Congress to punish the people who did it. But wait — actually, here's what nobody's saying — DeepSeek, Moonshot AI, MiniMax, they already did 16 million exchanges back in February. Anthropic documented it. Nothing changed. So why Congress, why now?

Ben Okonkwo: The gap between knowing and acting. That's the real story.

Ben Okonkwo: Right, but — okay, pump the brakes for a second. Anthropic's language is 'operators linked to Alibaba's Qwen lab.' That's directional. That's not a command chain. 25,000 accounts could be purchased from resellers, routed through proxies, and the actual decision-maker is — we don't know. Alibaba is literally suing the U.S. government right now to get off the Pentagon blacklist. The public record on this is completely one-sided.

Marcus Vale: Hold on. You're saying Anthropic fabricated the query volumes?

Ben Okonkwo: No — the volumes are real. 28.8 million exchanges, not disputing that. But 'this happened' and 'Alibaba ordered it' are two different evidentiary claims. And here's what actually bothers me — February 2026, DeepSeek, Moonshot AI, MiniMax, 16 million exchanges, 24,000 fraudulent accounts. Anthropic documented it. Platform defenses didn't materially tighten. So now the Alibaba campaign is 1.8 times larger and suddenly there's a White House letter? That sequencing is — I mean, that's not national security response logic, that's something else.

Marcus Vale: OpenAI flagged the same pattern. Google flagged it. So it's not just Anthropic crying wolf.

Ben Okonkwo: Pattern is real. But pattern isn't proof of this specific actor. And the capability-transfer claim needs — actually, this is where I want to slow down. Claude misidentifying as competitor models tells you behavioral imitation worked. Output signatures got copied. It does not tell you whether Qwen absorbed Claude's actual reasoning depth or just its formatting. Those are genuinely different threat levels.

Marcus Vale: That's the gap Anthropic hasn't closed publicly.

Marcus Vale: But look — that gap you're pointing at? That's actually where the hot take lands correctly. Export controls assume you protect the weights, you protect the chips. The whole framework assumes that. But the attack surface here is the API. Every query is a legal interaction. You can't sanction a GET request.

Ben Okonkwo: Hm. That's — yeah, that's the structural problem.

Marcus Vale: Think about Claude Tag — launched June 23rd, Slack-integrated, monitors your channels, delegates tasks, connects directly to your codebase autonomously. That agentic reasoning workflow? Anthropic says that's exactly the capability domain Alibaba was targeting. So imagine a developer running Claude Tag on a Tuesday morning — that whole workflow, being systematically harvested across 28.8 million exchanges. Geo-restriction failed because commercial proxies were — frankly, trivially sufficient. At that scale.

Ben Okonkwo: Right, the geofencing failed not because it was sophisticated and got outmaneuvered — it failed because it was never going to work against commercial proxy infrastructure. That's not a close call.

Marcus Vale: Which is why Congress getting a letter isn't really about catching Alibaba. It's — wait, actually this is the part that matters for Dario Amodei specifically — Anthropic is approaching an IPO. The valuation rests on a frontier capability moat. If Qwen absorbed even 40% of Claude's software engineering and agentic reasoning at effectively zero training cost, the R&D cost asymmetry between U.S. and Chinese labs just... collapses. That's a valuation problem dressed up as a national security argument.

Ben Okonkwo: I'll partially grant that. The structural inadequacy of export controls at the API layer — that part holds. Where I'd push back is the 'moat is broken' conclusion assumes the distillation lag is short enough to matter before Anthropic ships the next capability generation. And we don't actually know that yet.

Ben Okonkwo: Right, but that's actually — okay, that's the concession I'll make. The structural question Anthropic put to Congress is real: if commercial proxies can route 28.8 million queries past geofencing, what enforcement mechanism actually holds? Export controls on chips don't touch that. API-level interactions are legal by definition. There's no framework that catches this.

Marcus Vale: Okay, not pure IPO theater. I'll take that.

Ben Okonkwo: But — and this is the part that's almost funny — Anthropic writing to the Senate Committee on Banking, Housing, and Urban Affairs while heading to an IPO is not a coincidence. The best argument Dario Amodei has for why distillation is a national security crisis is also, word for word, the best argument for why investors should pay a premium to fund the one lab that stays ahead of it.

Marcus Vale: The moat is the threat. The threat is the moat.