model-extraction
Anthropic closed the hole distillers used to read Claude's thinking News
With Claude Fable 5.1, Anthropic blocked new API accounts from editing earlier turns of a conversation while keeping Claude's prior reasoning in the transcript -- shutting off a publicly documented technique for extracting a model's internal thinking at scale.
The paper being used to prove Kimi copied Claude says otherwise News
A study on stealing reasoning traces found that Kimi K3 responds unusually strongly to Claude's decoded reasoning, but the authors state plainly that their results cannot establish memorization or distillation, and that reproducing even 16 tokens verbatim would take about ten billion queries.
315,000 hidden reasoning blocks were sitting in public repos, and they can be read News
Researchers decoded 315,320 encrypted reasoning blocks scraped from public code repositories and recovered 367 pieces of personal data and 182 credentials, showing the hidden thinking that AI providers return to developers is neither private nor tamper-proof.
A prompt injection can hide inside an encrypted reasoning block nobody can read News
The paper behind last week's reasoning-trace decoding attack is now public with full numbers, and its fourth attack vector is the alarming one: malicious instructions can be embedded entirely inside encrypted thinking blocks and passed into public agent runs invisibly.
Encrypted reasoning blocks decode inside a weaker sibling model News
Researchers showed the encrypted chain-of-thought blocks that AI providers hand back to clients are interchangeable across sessions, users and models, and that injecting one into a weaker model from the same company makes it print the hidden reasoning verbatim.
Beijing says U.S. firms distilled Chinese models, and names none of them News
China's Ministry of Commerce said in a written statement on 27 July that many U.S. AI companies had distilled Chinese models during research and training, identifying no company, no model and no evidence, mirroring a U.S. accusation five days earlier that named two companies but published no logs either.
White House Says Moonshot Distilled Anthropic's Fable to Build Kimi K3 News
OSTP Director Michael Kratsios said the US government has information that Moonshot AI distilled Anthropic's Fable model to build Kimi K3, but no supporting evidence has been made public.