Claude Opus 5.5 vs Claude Sonnet 5.5
Every finance benchmark where both have a score (Anthropic and Anthropic). Data refreshed 2 Nov 2026.
- Shared benchmarks
- 4
- Claude Opus 5.5 only
- 1
- Claude Sonnet 5.5 only
- 0
Shared benchmarks, side by side
Each benchmark is drawn on its own scale. Bars are not comparable across rows.
- Claude Opus 5.5
- Claude Sonnet 5.5
Excel Modeling Benchmark (EMB) accuracy %, higher is better
Claude Opus 5.5:75.8Claude Sonnet 5.5:75.9 (better)Finance Agent Benchmark Partial Credit accuracy %, higher is better
Claude Opus 5.5:67.8 (better)Claude Sonnet 5.5:67.3Vals Finance Index index accuracy %, higher is better
Claude Opus 5.5:65.6 (better)Claude Sonnet 5.5:64.5Tax Agent Bench accuracy % (all-pass x citation factor), higher is better
Claude Opus 5.5:45.6 (better)Claude Sonnet 5.5:42.0
Benchmark
Claude Opus 5.5
Claude Sonnet 5.5
5 benchmarks, 4 scored for both. Bold marks the better score where both have one.
Excel Modeling Benchmark (EMB)accuracy %, higher is better
Finance Agent BenchmarkPartial Credit accuracy %, higher is better
Vals Finance Indexindex accuracy %, higher is better
Tax Agent Benchaccuracy % (all-pass x citation factor), higher is better
FinanceBench% correct, no filing given (150-question sample), higher is better
Not scored
Scores from different benchmarks use different scales and are not added up. Settings can differ between sources; see each leaderboard for details.