Claude Mythos Preview (Early): benchmark scores, price and ranking
Claude Mythos Preview (Early) from Anthropic ranks #47 of 743 LLMs on the LLMs Tiger aggregate benchmark score (53.0), based on 2 benchmark results captured up to 2026-10-13.
- Organisation
- Anthropic
- Type
- Preview release
- Open weights
- No
- Cheapest API price
- $10.00 in / $50.00 out per million tokens (via anthropic, observed 2026-10-13T20:47Z)
- Aggregate rank
- #47 of 743 (score 53.0)
Across the 1 benchmark where at least ten models are scored, Claude Mythos Preview (Early) is in the top 10% on 1 and in the top half on 1.
Its cheapest listed input price, $10.00 per million tokens, is lower than that of 4% of the 427 models with a listed price.
Claude Mythos Preview (Early) benchmark results
| Benchmark | Score | Rank | Source | Captured |
|---|---|---|---|---|
| METR time horizon | 1,045 min | #1 of 31 | Epoch AI Benchmarking Hub | 2026-10-13 |
| ExploitBench | 73.8% | #1 of 4 | Epoch AI Benchmarking Hub | 2026-10-13 |
About Claude Mythos Preview (Early)
Claude Mythos Preview (Early) is a preview release from Anthropic. The cheapest API listing we track charges $10.00 per million input tokens and $50.00 per million output tokens, through anthropic. We hold 2 benchmark results for it across 1 area, and 1 is in the top tenth of its board.
Where Claude Mythos Preview (Early) stands
On our aggregate score, Claude Mythos Preview (Early) is #47 of 743 ranked models, in the top fifty. Its score is 53.0; the scale is centred on 50, so it sits 3.0 points above the typical model. That beats 94% of the ranked field. Among the 70 ranked Anthropic models it is #11. The next one up is Claude Opus 4.7 (max) at 53.7. The next one down is CodeAct v2.1 (claude-3-5-sonnet-20241022) at 52.8.
Claude Mythos Preview (Early), benchmark by benchmark
METR time horizon is where Claude Mythos Preview (Early) does best: 1,045 min, first of 31. The next result is GPT-5.4 (xhigh) at 342 min, 703 minutes behind. It covers length of task (minutes) done at 50% success. The board median is 23 min, so Claude Mythos Preview (Early) is 1022 minutes above it. Source: Epoch AI Benchmarking Hub, captured 2026-10-13.
The full table above also lists the other 1 result, including boards with fewer than ten models, where a rank says little.
Strengths and weaknesses
Claude Mythos Preview (Early) has too few results on boards with ten or more models to say where it is strong or weak. Treat any single score as a data point, not a verdict.
Price and value
The median input price across the 427 priced models is $0.500 per million tokens, so Claude Mythos Preview (Early) costs more than the typical listing. Models that score within 1.5 points or better and cost less: DeepSeek V4 Flash 0731 (max) ($0.016, 53.1), GLM-5.2 (high) ($0.060, 51.6), Qwen3-Coder-30B-A3B-Instruct ($0.070, 52.7). Similar scores cost more on o1-2024-12-17 ($15.00) and GPT-4 (0806) ($30.00).
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
- #44 NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16 (53.1)
- #45 Claude Code + Sonnet 5.5 (53.0)
- #46 Qwen3.5-122B-A10B (53.0)
- #48 Gemini 2.5 Pro Preview 05-06 (53.0)
- #49 Solar-Open2-250B (52.9)
- #50 Kimi K2.5 (Fireworks) (52.8)
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