Claude Fable 5.1 (XHigh)vsClaude 5.5 Haiku
Claude Fable 5.1 (XHigh) leads the overall Podium Score by 1.5 points (89.0 vs 87.5).Category wins: Claude Fable 5.1 (XHigh) 1 — 3 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 78 t/s).
Claude Fable 5.1 (XHigh)Drag slider or hover to compareClaude 5.5 Haiku
Quick VerdictAggregated 2026 Benchmark Analysis
Claude Fable 5.1 (XHigh) is rated higher overall with a Podium Score of 89.0 (vs 87.5 for Claude 5.5 Haiku). In head-to-head domain evaluations, Claude 5.5 Haiku outperforms in 3 of 7 benchmark categories.
Coding & Engineering
Claude Fable 5.1 (XHigh) (88.0)
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 (XHigh) $3/M · $15/M — Claude 5.5 Haiku $0.8/M · $4/M
Choose Claude Fable 5.1 (XHigh) for coding and software engineering, and Claude 5.5 Haiku for complex reasoning and analysis.
| Metric | Claude Fable 5.1 (XHigh) | Claude 5.5 Haiku |
|---|---|---|
| Podium Score | 89.0 ▲ | 87.5 |
| Arena Elo | — | 1410 |
| Intelligence Index | — | 88.0 |
| Coding | 88.0 ▲ | 84.0 |
| Math | — | 86.5 |
| Reasoning | 85.0 | 88.0 ▲ |
| Agentic | — | 78.5 |
| Knowledge | 45.0 | 81.0 ▲ |
| Multimodal | 30.0 | 88.0 ▲ |
| Long-context | — | 91.0 |
| Output speed | 78 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 (XHigh) vs Claude Mythos · Claude Fable 5.1 (XHigh) vs Claude 5.5 Sonnet · Claude Fable 5.1 (XHigh) vs Kimi K3.1 Pro · Claude Fable 5.1 (XHigh) vs Eleven Multilingual v3