Claude Opus 5.5 vs DeepSeek V4.1 Flash 1017

Every finance benchmark where both have a score (Anthropic and DeepSeek). Data refreshed 2 Nov 2026.

Shared benchmarks
2
Claude Opus 5.5 only
3
DeepSeek V4.1 Flash 1017 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
  • DeepSeek V4.1 Flash 1017

  • Vals Finance Index index accuracy %, higher is better

    Claude Opus 5.5:65.6 (better)
    DeepSeek V4.1 Flash 1017:60.9

  • Tax Agent Bench accuracy % (all-pass x citation factor), higher is better

    Claude Opus 5.5:45.6 (better)
    DeepSeek V4.1 Flash 1017:44.4
Benchmark
Claude Opus 5.5
DeepSeek V4.1 Flash 1017

5 benchmarks, 2 scored for both. Bold marks the better score where both have one.

Vals Finance Indexindex accuracy %, higher is better
65.6
Vals.ai leaderboard (Official board, 29 Oct 2026)
60.9
Vals.ai leaderboard (Official board, 29 Oct 2026)
Tax Agent Benchaccuracy % (all-pass x citation factor), higher is better
45.6
Vals.ai leaderboard (Official board, 29 Oct 2026)
44.4
Vals.ai leaderboard (Official board, 29 Oct 2026)
FinanceBench% correct, no filing given (150-question sample), higher is better
60.3
Moneda run, 2026-11-02 (Run by Moneda, 2 Nov 2026)
Not scored
Excel Modeling Benchmark (EMB)accuracy %, higher is better
75.8
Vals.ai leaderboard (Official board, 29 Oct 2026)
Not scored
Finance Agent BenchmarkPartial Credit accuracy %, higher is better
67.8
Vals.ai leaderboard (Official board, 29 Oct 2026)
Not scored

Scores from different benchmarks use different scales and are not added up. Settings can differ between sources; see each leaderboard for details.