Claude Mythos PreviewvsClaude Opus 5
Claude Mythos Preview leads the overall Podium Score by 16.0 points (97.4 vs 81.4).Category wins: Claude Mythos Preview 3 — 0 Claude Opus 5.Claude Mythos Preview is the cheaper pick ($15/M vs $25/M per 1M output tokens). Claude Mythos Preview is faster (80 t/s vs 60 t/s).
| Metric | Claude Mythos Preview | Claude Opus 5 |
|---|---|---|
| Podium Score | 97.4 ▲ | 81.4 |
| Arena Elo | — | 1492 |
| Intelligence Index | — | 61.0 |
| Coding | 80.9 ▲ | 70.4 |
| Math | 100.0 | — |
| Reasoning | 98.8 ▲ | 82.3 |
| Agentic | — | — |
| Knowledge | 100.0 ▲ | 37.1 |
| Multimodal | 100.0 | — |
| Long-context | — | 99.2 |
| Output speed | 80 t/s ▲ | 60 t/s |
| Output price | $15/M ▲ | $25/M |
| Context window | — | 1000K |
Scores aggregated from five leaderboards on 2026-08-05. See Methodology. More head-to-heads: Claude Mythos Preview vs Claude Fable 5 · Claude Mythos Preview vs Kimi K3 · Claude Mythos Preview vs GPT-5.6 Sol · Claude Mythos Preview vs Qwen3.8 Max