Benchmark scores
Higher is better for all benchmark scores (SWE-bench, GPQA, HLE, Terminal-Bench, etc.). Green marks the model with the higher score.
LLM Comparison
Claude Fable 5.1 vs Claude Sonnet 5.5: benchmark scores, pricing & comparison.
Side-by-side Claude Fable 5.1 vs Claude Sonnet 5.5 comparison across SWE-bench, GPQA, HLE, Terminal-Bench, coding agent scores, token pricing, context window, and AskClash RWT. Green marks the winner on each benchmark.
Verdict: Claude Fable 5.1 ranks higher (#1 vs #6) and wins 5 of 7 shared benchmarks; Claude Sonnet 5.5 costs less ($2.00/$10.0 vs $10.0/$50.0 per 1M tokens).
Rank #1 vs #6AskClash overall scores 80.8 vs 73.3.
Pricing $10.0/$50.0 vs $2.00/$10.0Input and output token prices per 1M tokens when published.
Proprietary vs ProprietaryAnthropic vs Anthropic.
Claude Fable 5.1 vs Claude Sonnet 5.5 benchmark comparison
Green cells highlight the winning model for each metric. Scores are cached from the AskClash LLM leaderboard snapshot.
| Metric | Claude Fable 5.1 | Claude Sonnet 5.5 |
|---|---|---|
| Overall Score | 80.8 | 73.3 |
| Leaderboard Rank | #1 | #6 |
| ACB | 79.2 | 75.3 |
| RWT | 9.0 | — |
| Coding Agent Index | 62.2 | — |
| HLE | 65.0 | 64.5 |
| GPQA | 93.7 | — |
| SWE-Pro | 81.2 | 81.3 |
| SWE-Atlas | 64.8 | — |
| Terminal-Bench | 91.4 | 83.2 |
| DeepSWE | 67.4 | 71.0 |
| GDPval-AA | 1853.0 | 1844.2 |
| Finance Agent | 58.9 | 58.1 |
| MMMU-Pro | 90.6 | — |
| ARC-AGI 2 | 90.0 | — |
| Input Price (per 1M tokens) | $10.0 | $2.00 |
| Output Price (per 1M tokens) | $50.0 | $10.0 |
| Context Window | 1M | 1M |
| Benchmarks Published | 15 | 10 |
Claude Fable 5.1 vs Claude Sonnet 5.5 head-to-head charts
Claude Fable 5.1 leads 6 and Claude Sonnet 5.5 leads 2 of 8 shared benchmarks. Claude Sonnet 5.5 is cheaper on a defined 1M-input / 200K-output workload. Charts show only benchmarks both models publish.
Claude Fable 5.1Claude Sonnet 5.5
Overall
ACB
HLE
SWE-Pro
Terminal-Bench
DeepSWE
GDPval-AA
Finance Agent
Claude Fable 5.1
Input$10.0
Output$50.0
Workload$20
Context1M
Claude Sonnet 5.5
Input$2.00
Output$10.0
Workload$4.00
Context1M
Workload = published cost of 1M input + 200K output tokens. Open the live leaderboard for interactive compare charts.
More Claude Fable 5.1 and Claude Sonnet 5.5 comparisons
Explore how Claude Fable 5.1 and Claude Sonnet 5.5 stack up against other top-ranked LLMs.
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How to read this comparison
Token pricing
Lower is better for input and output prices. Green marks the cheaper model per 1M tokens.
Coverage matters
Models with fewer disclosed benchmark cells may have inflated percentile scores. Check the benchmark cell count for context.
This comparison page is generated from the AskClash LLM leaderboard cache. Open the live leaderboard for real-time scores and interactive filtering.