Claude Fable 5.1vsClaude Opus 4.8
Claude Fable 5.1 leads the overall Podium Score by 12.4 points (88.4 vs 76.0).Category wins: Claude Fable 5.1 3 — 1 Claude Opus 4.8.Claude Fable 5.1 is the cheaper pick ($15/M vs $15/M per 1M output tokens). Claude Fable 5.1 is faster (85 t/s vs 50 t/s).
Key VerdictAggregated 2026 Benchmark Analysis
Claude Fable 5.1 is rated higher overall with a Podium Score of 88.4 (vs 76.0 for Claude Opus 4.8). In head-to-head domain evaluations, Claude Fable 5.1 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
Claude Fable 5.1 ($15/M/M)
| Metric | Claude Fable 5.1 | Claude Opus 4.8 |
|---|---|---|
| Podium Score | 88.4 ▲ | 76.0 |
| Arena Elo | — | 1484 |
| Intelligence Index | — | 55.7 |
| Coding | 95.5 ▲ | 58.0 |
| Math | — | 58.7 |
| Reasoning | 92.0 ▲ | 82.8 |
| Agentic | — | 74.9 |
| Knowledge | 58.0 ▲ | 28.8 |
| Multimodal | 62.0 | 89.6 ▲ |
| Long-context | — | 99.2 |
| Output speed | 85 t/s ▲ | 50 t/s |
| Output price | $15/M | $15/M |
| Context window | 500K | 1000K ▲ |
Scores aggregated from five independent leaderboards. See Methodology. More head-to-heads: Claude Fable 5.1 vs Claude Mythos · Claude Fable 5.1 vs Claude Fable 5 · Claude Fable 5.1 vs GPT-6 Astra · Claude Fable 5.1 vs Kimi K3