Claude Opus 5 vs GPT-5.5 in finance

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

Shared benchmarks
2
Claude Opus 5 only
2
GPT-5.5 only
2

Shared benchmarks, side by side

Each benchmark is drawn on its own scale. Bars are not comparable across rows.

  • Claude Opus 5
  • GPT-5.5

  • τ³-Banking pass^1 %, higher is better

    Claude Opus 5:48.7 (better)
    GPT-5.5:44.6

  • CorpFin v2 accuracy %, higher is better

    Claude Opus 5:73.2 (better)
    GPT-5.5:68.4
Benchmark
Claude Opus 5
GPT-5.5

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

τ³-Bankingpass^1 %, higher is better
48.7
τ-bench leaderboard (Sierra) (Official board, 4 Aug 2026)
44.6
τ-bench leaderboard (Sierra) (Official board, 5 May 2026)
CorpFin v2accuracy %, higher is better
73.2
Vals.ai leaderboard (archived) (Official board, 12 Aug 2026)
68.4
Vals.ai leaderboard (archived) (Official board, 12 Aug 2026)
BlueFincriteria-weighted score % (overall), higher is better
Not scored
49.6
Paper Table 2 (Reported by the authors, May 2026)
KTD-Fintotal return %, higher is better
Not scored
61.3
Paper Table 4 (Reported by the authors, 27 May 2026)
MortgageTaxaccuracy %, higher is better
72.1
Vals.ai MortgageTax leaderboard (Official board, 1 Sept 2026)
Not scored
Tax Agent Benchaccuracy % (all-pass x citation factor), higher is better
45.5
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.