Claude Fable 5.1vsGPT-6 Astra
Claude Fable 5.1 leads the overall Podium Score by 2.2 points (88.4 vs 86.2).Category wins: Claude Fable 5.1 2 — 2 GPT-6 Astra.Claude Fable 5.1 is the cheaper pick ($15/M vs $50/M per 1M output tokens). Claude Fable 5.1 is faster (85 t/s vs 82 t/s).
Key VerdictAggregated 2026 Benchmark Analysis
Claude Fable 5.1 is rated higher overall with a Podium Score of 88.4 (vs 86.2 for GPT-6 Astra). Both models show closely matched capabilities across domain benchmarks.
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 | GPT-6 Astra |
|---|---|---|
| Podium Score | 88.4 ▲ | 86.2 |
| Arena Elo | — | 1498 |
| Intelligence Index | — | 61.0 |
| Coding | 95.5 ▲ | 67.2 |
| Math | — | 97.6 |
| Reasoning | 92.0 | 96.0 ▲ |
| Agentic | — | 72.6 |
| Knowledge | 58.0 ▲ | 31.5 |
| Multimodal | 62.0 | 98.2 ▲ |
| Long-context | — | 100.0 |
| Output speed | 85 t/s ▲ | 82 t/s |
| Output price | $15/M ▲ | $50/M |
| Context window | 500K | 1100K ▲ |
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 Kimi K3 · Claude Fable 5.1 vs Claude Opus 5