Claude Mythos PreviewvsClaude Fable 5.1
Claude Mythos Preview leads the overall Podium Score by 9.0 points (97.4 vs 88.4).Category wins: Claude Mythos Preview 3 — 1 Claude Fable 5.1. Claude Fable 5.1 is faster (85 t/s vs 80 t/s).
Claude Mythos PreviewDrag slider or hover to compareClaude Fable 5.1
Quick VerdictAggregated 2026 Benchmark Analysis
Claude Mythos Preview is rated higher overall with a Podium Score of 97.4 (vs 88.4 for Claude Fable 5.1). In head-to-head domain evaluations, Claude Mythos Preview outperforms in 3 of 7 benchmark categories.
Coding & Engineering
Claude Fable 5.1 (95.5)
Inference Speed
Claude Fable 5.1 (85 t/s)
Cost Efficiency
Comparable
API Price / 1M (in · out)
Claude Mythos $3/M · $15/M — Claude Fable 5.1 $3/M · $15/M
Choose Claude Mythos Preview for knowledge and factual QA, and Claude Fable 5.1 for coding and software engineering.
| Metric | Claude Mythos Preview | Claude Fable 5.1 |
|---|---|---|
| Podium Score | 97.4 ▲ | 88.4 |
| Arena Elo | — | — |
| Intelligence Index | — | — |
| Coding | 80.9 | 95.5 ▲ |
| Math | 100.0 | — |
| Reasoning | 98.8 ▲ | 92.0 |
| Agentic | — | — |
| Knowledge | 100.0 ▲ | 58.0 |
| Multimodal | 100.0 ▲ | 62.0 |
| Long-context | — | — |
| Output speed | 80 t/s | 85 t/s ▲ |
| Output price | $15/M | $15/M |
| Context window | 1000K ▲ | 500K |
Scores aggregated from five independent leaderboards. See Methodology. More head-to-heads: Claude Mythos vs Claude 5.5 Sonnet · Claude Mythos vs Kimi K3.1 Pro · Claude Mythos vs Eleven Multilingual v3 · Claude Mythos vs FLUX.2 Pro