Claude Mythos PreviewvsClaude Opus 4.8
Claude Mythos Preview leads the overall Podium Score by 21.4 points (97.4 vs 76.0).Category wins: Claude Mythos Preview 5 — 0 Claude Opus 4.8.Claude Mythos Preview is the cheaper pick ($15/M vs $15/M per 1M output tokens). Claude Mythos Preview is faster (80 t/s vs 50 t/s).
| Metric | Claude Mythos Preview | Claude Opus 4.8 |
|---|---|---|
| Podium Score | 97.4 ▲ | 76.0 |
| Arena Elo | — | 1484 |
| Intelligence Index | — | 55.7 |
| Coding | 80.9 ▲ | 58.0 |
| Math | 100.0 ▲ | 58.7 |
| Reasoning | 98.8 ▲ | 82.8 |
| Agentic | — | 74.9 |
| Knowledge | 100.0 ▲ | 28.8 |
| Multimodal | 100.0 ▲ | 89.6 |
| Long-context | — | 99.2 |
| Output speed | 80 t/s ▲ | 50 t/s |
| Output price | $15/M | $15/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 Claude Opus 5 · Claude Mythos Preview vs GPT-5.6 Sol