Anthropic releases Claude 2.1 with tools and 200K context
Anthropic released Claude 2.1 in its API and chat product with a 200K context window, beta tool use, system prompts and lower measured hallucination rates.
TOWARD DOOM51confidence 97/100
Why it moved the index
Much longer context and initial tool use expanded enterprise task capability and autonomy while measured accuracy gains and hosted controls limited the risk increase.
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AUDIT TRAIL
Assessment history
- R1Toward 51 · confidence 97
New November 2023 exact hosted-model release.
12 Aug 2026