Claude Mythos PreviewvsGPT-6 Astra
Claude Mythos Preview leads the overall Podium Score by 11.2 points (97.4 vs 86.2).Category wins: Claude Mythos Preview 5 — 0 GPT-6 Astra.Claude Mythos Preview is the cheaper pick ($15/M vs $50/M per 1M output tokens). GPT-6 Astra is faster (82 t/s vs 80 t/s).
Key VerdictAggregated 2026 Benchmark Analysis
Claude Mythos Preview is rated higher overall with a Podium Score of 97.4 (vs 86.2 for GPT-6 Astra). In head-to-head domain evaluations, Claude Mythos Preview outperforms in 5 of 7 benchmark categories.
Coding & Engineering
Claude Mythos Preview (80.9)
Inference Speed
GPT-6 Astra (82 t/s)
Cost Efficiency
Claude Mythos Preview ($15/M/M)
| Metric | Claude Mythos Preview | GPT-6 Astra |
|---|---|---|
| Podium Score | 97.4 ▲ | 86.2 |
| Arena Elo | — | 1498 |
| Intelligence Index | — | 61.0 |
| Coding | 80.9 ▲ | 67.2 |
| Math | 100.0 ▲ | 97.6 |
| Reasoning | 98.8 ▲ | 96.0 |
| Agentic | — | 72.6 |
| Knowledge | 100.0 ▲ | 31.5 |
| Multimodal | 100.0 ▲ | 98.2 |
| Long-context | — | 100.0 |
| Output speed | 80 t/s | 82 t/s ▲ |
| Output price | $15/M ▲ | $50/M |
| Context window | 1000K | 1100K ▲ |
Scores aggregated from five independent leaderboards. See Methodology. More head-to-heads: Claude Mythos vs Claude Fable 5 · Claude Mythos vs Claude Fable 5.1 · Claude Mythos vs Kimi K3 · Claude Mythos vs Claude Opus 5