Today, we'll resume charging for requests our safeguards block before Claude…
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- ClaudeDevs
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Today, we'll resume charging for requests our safeguards block before Claude responds. This only applies in categories with low false positive rates: biology, distillation attacks, and frontier LLM development. We've seen some coordinated attacks on our systems in recent weeks, and this is one layer of defense. In recent testing, 99.7% of accounts using Claude Code, Claude.ai, or Cowork did not hit any of these newly "billable blocks." The classifiers behind the blocks we’re resuming charging for today are tuned to have a <0.1% false positive rate. We know that's not 0%, and we're going to keep improving them so they interrupt your work less often. If you think a request has been blocked incorrectly, please report it with /feedback in Claude Code. https://t.co/uX6JhvN6He
- Anthropic is again charging for requests its safeguards block before Claude responds, but only in three categories it says have low false-positive rates: biology, attacks, and frontier development.
- Anthropic ties the change to coordinated attacks on its systems in recent weeks and describes billing these blocked requests as one layer of defense.
- In Anthropic's testing, 99.7% of accounts using Claude Code, Claude.ai or Cowork hit none of these billable blocks, and the classifiers are tuned for a false-positive rate under 0.1%; Anthropic says it will keep working to lower it.
- distillation — Training a small, cheap model to imitate a big one's outputs, keeping much of the capability at a fraction of the cost.
- LLM — A large language model — the neural network behind tools like Claude and ChatGPT, trained on huge amounts of text to predict what comes next.
Claude Code, claude.ai, and Cowork users working in biology, model-distillation-adjacent, or frontier-LLM-development areas should expect occasional billed pre-response blocks and know how to report false positives via /feedback.
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