Capability gains

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.

CURRENT ASSESSMENT · REVISION 1
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

  1. R1
    Toward 51 · confidence 97

    New November 2023 exact hosted-model release.

    12 Aug 2026