Proprietary
- Params
- —
- Context
- —
- Released
- Apr 2026
Anthropic's frontier model, gated to ~50 partners under Project Glasswing..
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// COMPARISON
Claude Mythos Preview
A head-to-head benchmark comparison of Claude Mythos Preview across 2 evaluations.
The models
Benchmark comparison
| Benchmark | Claude Mythos Preview |
|---|---|
| code | |
| SWE-bench Pro | 69.8% |
| cybersecurity | |
| CWE-Bench-Java | 71.5% |
Best result per row highlighted in cyan. Each benchmark links to its definition and sources; each model links to its full scorecard.
Frequently asked questions
Which of these models is best for coding? ▶
Claude Mythos Preview has the strongest result on SWE-bench Pro among the models compared here. See the code-category rows in the table for the full picture.
How many benchmarks are compared? ▶
This comparison covers 2 benchmarks on which at least one of the selected models has a published score.
Where do the benchmark scores come from? ▶
Scores are aggregated from official model cards, technical reports and standard public evaluations, and link back to each benchmark's source. They are updated as new results are published.
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