claude-opus-4-1-20250805_27K: benchmark scores, price and ranking
claude-opus-4-1-20250805_27K from Anthropic ranks #171 of 743 LLMs on the LLMs Tiger aggregate benchmark score (50.7), based on 2 benchmark results captured up to 2026-10-13.
- Organisation
- Anthropic
- Type
- Frontier model
- Open weights
- No
- Released
- 2025-08-05 (source: name)
- Aggregate rank
- #171 of 743 (score 50.7)
Across the 2 benchmarks where at least ten models are scored, claude-opus-4-1-20250805_27K is in the top 10% on 0 and in the top half on 2.
claude-opus-4-1-20250805_27K benchmark results
| Benchmark | Score | Rank | Source | Captured |
|---|---|---|---|---|
| OTIS Mock AIME | 68.9% | #80 of 189 | Epoch AI Benchmarking Hub | 2026-10-13 |
| GPQA Diamond | 76.8% | #118 of 275 | Epoch AI Benchmarking Hub | 2026-10-13 |
About claude-opus-4-1-20250805_27K
claude-opus-4-1-20250805_27K is a frontier model from Anthropic. It was released on 2025-08-05, according to the model's own name. No API price is listed for it yet. We hold 2 benchmark results for it across 1 area, and none is in the top tenth of its board.
Where claude-opus-4-1-20250805_27K stands
On our aggregate score, claude-opus-4-1-20250805_27K is #171 of 743 ranked models, in the top quarter. Its score is 50.7; the scale is centred on 50, so it sits 0.7 points above the typical model. That beats 77% of the ranked field. Among the 70 ranked Anthropic models it is #28. The next one up is claude-3-5-haiku-20241022 at 50.8. The next one down is Claude Sonnet 4.5 (59k thinking) at 50.6.
claude-opus-4-1-20250805_27K, benchmark by benchmark
OTIS Mock AIME puts claude-opus-4-1-20250805_27K at 68.9%, #80 of 189. That beats 58% of the models tested, but 31.1 points short of Claude Fable 5.1 (max) (100.0%). The results either side are qwen3-30b-a3b-thinking-2507 (70.3%) and claude-sonnet-4-20250514_59K (68.9%). It covers competition maths (AIME 2024-25 style). The board median is 57.8%, so claude-opus-4-1-20250805_27K is 11.1 points above it. Source: Epoch AI Benchmarking Hub, captured 2026-10-13.
On GPQA Diamond, claude-opus-4-1-20250805_27K reaches 76.8%. It ranks #118 of 275, ahead of 57% of the field, and 19.0 points behind GPT-6 Astra (max) at 95.8%. The results either side are o3-mini (high) (77.0%) and o1 (high) (76.8%). It covers expert-level science questions. The board median is 71.7%, so claude-opus-4-1-20250805_27K is 5.1 points above it. Source: Epoch AI Benchmarking Hub, captured 2026-10-13.
Strengths and weaknesses
Reasoning, maths and science: solid, ahead of 57% of the field on average across 2 benchmarks. Its best board here is OTIS Mock AIME (#80 of 189) and its weakest is GPQA Diamond (#118 of 275).
Release history
The Anthropic model released before it was claude-opus-4-1-20250805_16K on 2025-08-05, which scores 49.5. The next one was claude-opus-4-1-20250805_32K on 2025-08-05, at 46.0.
Reading these numbers
The 2 scores on this page come from 1 source: Epoch AI Benchmarking Hub (2). No official leaderboard supplied any of them, so treat them as third-party measurements. With 2 results the aggregate rank can move a lot when one new score arrives.
Models ranked nearby
- #168 claude-3-5-haiku-20241022 (50.8)
- #169 DeepSeek V3 0324 (50.8)
- #170 o3-mini_1.0 (50.7)
- #172 GPT-5.1 Codex (50.7)
- #173 Kimi K2.5 (50.7)
- #174 openrouter/qwen/qwen-2.5-coder-32b-instruct (50.7)
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