claude-2.1: benchmark scores, price and ranking
claude-2.1 from Anthropic ranks #732 of 743 LLMs on the LLMs Tiger aggregate benchmark score (40.6), based on 5 benchmark results captured up to 2026-10-13.
- Organisation
- Anthropic
- Type
- Frontier model
- Open weights
- No
- Released
- 2023-11-21 (source: curated)
- Aggregate rank
- #732 of 743 (score 40.6)
Relative to other models, claude-2.1 is strongest on Epoch ECI (#131 of 204) and weakest on WeirdML (#106 of 109).
Across the 5 benchmarks where at least ten models are scored, claude-2.1 is in the top 10% on 0 and in the top half on 0.
claude-2.1 benchmark results
| Benchmark | Score | Rank | Source | Captured |
|---|---|---|---|---|
| Epoch ECI | 119 | #131 of 204 | Epoch AI Benchmarking Hub | 2026-10-13 |
| DTBench | 51.0% | #127 of 146 | Epoch AI Benchmarking Hub | 2026-10-13 |
| GPQA Diamond | 33.0% | #241 of 275 | Epoch AI Benchmarking Hub | 2026-10-13 |
| OTIS Mock AIME | 1.9% | #173 of 189 | Epoch AI Benchmarking Hub | 2026-10-13 |
| WeirdML | 7.1% | #106 of 109 | Epoch AI Benchmarking Hub | 2026-10-13 |
About claude-2.1
claude-2.1 is a frontier model from Anthropic. It was released on 2023-11-21, according to the developer's announcement. No API price is listed for it yet. We hold 5 benchmark results for it across 3 areas, and none is in the top tenth of its board.
Where claude-2.1 stands
On our aggregate score, claude-2.1 is #732 of 743 ranked models, in the lower half. Its score is 40.6; the scale is centred on 50, so it sits 9.4 points below the typical model. That beats 1% of the ranked field. Among the 70 ranked Anthropic models it is #69. The next one up is Claude 3.5 Haiku (Oct 2024) at 41.3. The next one down is claude-3-haiku-20240307 at 39.9.
claude-2.1, benchmark by benchmark
claude-2.1 lands below the middle on Epoch ECI: 119, #131 of 204, with 64% of the field scoring higher. Qwen 3.8 Max leads at 156; the closest result above is Command R+ at 119. It covers Epoch Capabilities Index: Epoch's own aggregate of ~40 benchmarks. The board median is 127, so claude-2.1 is 8 points below it. Source: Epoch AI Benchmarking Hub, captured 2026-10-13.
DTBench is a weak spot. claude-2.1 scores 51.0%, #127 of 146, behind 86% of the models measured. The leader, Claude Opus 5.5 (max), reaches 98.9%. It covers dynamic tool-use benchmark. The board median is 68.8%, so claude-2.1 is 17.8 points below it. Source: Epoch AI Benchmarking Hub, captured 2026-10-13.
GPQA Diamond is a weak spot. claude-2.1 scores 33.0%, #241 of 275, behind 87% of the models measured. The leader, GPT-6 Astra (max), reaches 95.8%. It covers expert-level science questions. The board median is 71.7%, so claude-2.1 is 38.8 points below it. Source: Epoch AI Benchmarking Hub, captured 2026-10-13.
OTIS Mock AIME is a weak spot. claude-2.1 scores 1.9%, #173 of 189, behind 91% of the models measured. The leader, Claude Fable 5.1 (max), reaches 100.0%. It covers competition maths (AIME 2024-25 style). The board median is 57.8%, so claude-2.1 is 55.8 points below it. Source: Epoch AI Benchmarking Hub, captured 2026-10-13.
WeirdML is a weak spot. claude-2.1 scores 7.1%, #106 of 109, behind 96% of the models measured. The leader, GPT-6 Astra (max), reaches 93.3%. It covers unusual machine-learning tasks. The board median is 41.2%, so claude-2.1 is 34.1 points below it. Source: Epoch AI Benchmarking Hub, captured 2026-10-13.
Strengths and weaknesses
Reasoning, maths and science: weak, ahead of 10% of the field on average across 2 benchmarks. Its best board here is GPQA Diamond (#241 of 275) and its weakest is OTIS Mock AIME (#173 of 189). General knowledge and chat: weak, ahead of 19% of the field on average across 2 benchmarks. Its best board here is Epoch ECI (#131 of 204) and its weakest is WeirdML (#106 of 109).
Release history
The Anthropic model released before it was claude-instant-1.2 on 2023-08-09, which scores 45.8. The next one was Claude 3 Opus on 2024-03-04, at 45.7.
Reading these numbers
The 5 scores on this page come from 1 source: Epoch AI Benchmarking Hub (5). No official leaderboard supplied any of them, so treat them as third-party measurements. With 5 results the aggregate rank can move a lot when one new score arrives.
Models ranked nearby
- #729 Llama-3.2-1B-Instruct (41.1)
- #730 open-mistral-7b (41.0)
- #731 Llama-3.3-70B-Instruct (40.7)
- #733 Llama-4-Scout-17B-16E-Instruct (40.1)
- #734 gemma-3-4b-it (39.9)
- #735 qwen2.5-7b-instruct (39.9)
More from Anthropic
- Claude Opus 5.5 (max) (#1, 64.3)
- Claude Fable 5.1 (max) (#3, 61.9)
- Claude Sonnet 5.5 (max) (#4, 60.8)
- Claude Opus 5 (max) (#8, 60.0)
- Claude Fable 5 (max) (#9, 59.9)
- claude-opus-4-8-xhigh-effort (#14, 56.6)
Compare it on the live leaderboard → · How the aggregate score works