AnthropicClaude Mythos Preview
As of 6 Nov 2026, Claude Mythos Preview by Anthropic is not yet ranked on the BenchLeader Index, which needs at least five independent results across two categories. Released 7 Apr 2026.
Key facts (as of 6 Nov 2026)
- Claude Mythos Preview was released on 7 Apr 2026 (Anthropic).
In detail. Claude Mythos Preview is an Anthropic model, released 7 Apr 2026. It is not yet ranked: no independent benchmark results so far, only pricing and metadata.
- Blended price
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- Output speed
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- First answer
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- Context
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- Full answer
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- Cost per task
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- Tokens per task
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- Released
- 7 Apr 2026
Benchmark results
See all LLM benchmarks. One column per reasoning effort. Rank is among every configuration of every model on that benchmark. Hover a score for the run it came from.
Agents & tools
| Benchmark | not stated | Source |
|---|---|---|
| ExploitBenchnot in index | 73.8%#1 | Epoch AI Benchmarking Hub |
| METR Time Horizonsnot in index | 85.2%#1 | METR |
More from Anthropic
See also
Questions people ask
- Why does Claude Mythos Preview have no BenchLeader Index score?
- The index needs at least five independent results across at least two categories, and as of 6 Nov 2026 Claude Mythos Preview does not have them yet. Launch-post scores are never used, so it is ranked once independent publishers have measured it.
- When was Claude Mythos Preview released?
- Anthropic released Claude Mythos Preview on 7 Apr 2026.
Data as of 6 Nov 2026. Compare with another model.
Cite as: BenchLeader, “Claude Mythos Preview: benchmarks, pricing, speed and rank”, data as of 6 Nov 2026, https://www.benchleader.com/models/claude-mythos-early.