Claude Fable 5.1vsClaude 5.5 Haiku
Claude Fable 5.1 leads the overall Podium Score by 0.9 points (88.4 vs 87.5).Category wins: Claude Fable 5.1 2 — 2 Claude 5.5 Haiku.Claude 5.5 Haiku is the cheaper pick ($4/M vs $15/M per 1M output tokens). Claude 5.5 Haiku is faster (145 t/s vs 85 t/s).
Claude Fable 5.1Drag slider or hover to compareClaude 5.5 Haiku
Quick VerdictAggregated 2026 Benchmark Analysis
Claude Fable 5.1 is rated higher overall with a Podium Score of 88.4 (vs 87.5 for Claude 5.5 Haiku). Both models show closely matched capabilities across domain benchmarks.
Coding & Engineering
Claude Fable 5.1 (95.5)
Inference Speed
Claude 5.5 Haiku (145 t/s)
Cost Efficiency
Claude 5.5 Haiku ($4/M)
API Price / 1M (in · out)
Claude Fable 5.1 $3/M · $15/M — Claude 5.5 Haiku $0.8/M · $4/M
Choose Claude Fable 5.1 for coding and software engineering, and Claude 5.5 Haiku for vision and multimodal apps.
| Metric | Claude Fable 5.1 | Claude 5.5 Haiku |
|---|---|---|
| Podium Score | 88.4 ▲ | 87.5 |
| Arena Elo | — | 1410 |
| Intelligence Index | — | 88.0 |
| Coding | 95.5 ▲ | 84.0 |
| Math | — | 86.5 |
| Reasoning | 92.0 ▲ | 88.0 |
| Agentic | — | 78.5 |
| Knowledge | 58.0 | 81.0 ▲ |
| Multimodal | 62.0 | 88.0 ▲ |
| Long-context | — | 91.0 |
| Output speed | 85 t/s | 145 t/s ▲ |
| Output price | $15/M | $4/M ▲ |
| Context window | 500K | 500K |
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 5.5 Sonnet · Claude Fable 5.1 vs Kimi K3.1 Pro · Claude Fable 5.1 vs Eleven Multilingual v3