Claude 2.1
Hosted Claude release with 200K context, beta tool use, system prompts and lower measured hallucination rates.
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Why this model scores 47.4
Long context and beta tools materially expanded useful task capability, while improved accuracy, hosted access and provider safeguards kept misuse and control difficulty moderate.
News tied to Claude 2.1
The model score of 47.4 rates this model's risk profile. The overall Doom Index of 66.8 measures the complete temporally weighted evidence record. These values answer different questions.
Each article's current Doom Index contribution is divided equally among the exact models named on that article. This prevents multi-model evidence from being claimed in full on several model pages. Model risk scores use a bounded temporal offset around their technical profile, but never feed back into the overall index.
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.
- Full item contribution
- +0.10
- Claude 2.1 equal share
- +0.10
Model score history
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R4
Doom Score 47.4
Source-backed model availability audit using the model's existing primary or authoritative catalogue evidence. Exact-version evidence chronology replayed under temporal-monthly-pressure-v4.
12 Aug 2026 -
R3
Doom Score 47.4
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-142416 under temporal-monthly-pressure-v4.
12 Aug 2026 -
R2
Doom Score 49.0
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-132112 under fixed-sensitivity-v3.
12 Aug 2026 -
R1
Doom Score 52.0
New exact Claude 2.1 profile.
12 Aug 2026