Claude 2
A 100,000-token frontier conversational model with improved coding, mathematics and reasoning, available through API and public web beta.
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Why this model scores 45.7
Long context and stronger general performance raised capability and agent usefulness. Hosted access, safety training and geographic limits retained meaningful centralized control.
News tied to Claude 2
The model score of 45.7 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 finds long contexts enable many-shot jailbreaking
Anthropic showed that hundreds of in-prompt demonstrations could override safety training across several large language models, disclosed the weakness to peers and deployed prompt-classification mitigations that reduced one measured attack rate from 61 percent to 2 percent.
- Full item contribution
- +0.13
- Claude 2 equal share
- +0.13
Anthropic launches Claude 2 through API and public web access
Anthropic released Claude 2 with improved reasoning and coding, a 100,000-token context window, API access and a public beta website in the United States and United Kingdom.
- Full item contribution
- +0.10
- Claude 2 equal share
- +0.10
Model score history
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R5
Doom Score 45.7
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 -
R4
Doom Score 45.7
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-142416 under temporal-monthly-pressure-v4.
12 Aug 2026 -
R3
Doom Score 49.2
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-132112 under fixed-sensitivity-v3.
12 Aug 2026 -
R2
Doom Score 54.5
Full-corpus evidence recalculated after run intensive-backfill-20260812-033703-april-2024-incremental under bounded-corpus-v2.
12 Aug 2026 -
R1
Doom Score 50.6
New exact Claude 2 model profile from dated launch evidence.
12 Aug 2026