Today, we'll resume charging for requests our safeguards block before Claude…
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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
Context
Anthropic said it would resume charging for requests its safeguards block before Claude responds. It says this applies only in categories with low false-positive rates: biology, attacks, and frontier development. Anthropic cites coordinated attacks on its systems in recent weeks and calls the billing one layer of defense. It reports that in recent testing 99.7% of accounts using Claude Code, Claude.ai, or Cowork did not hit any of these billable blocks, and says the classifiers are tuned to a false-positive rate below 0.1%, which it acknowledges is not zero. Anyone who thinks a request was blocked incorrectly is asked to report it with /feedback in Claude Code. Both rates are Anthropic's own figures.
- 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.
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