Compare Models

Claude Opus 4.5 (Nonthinking)

Claude Opus 4.5 (Nonthinking) is a model from Anthropic, released November 24, 2025. Its best result is #38 of 107 on MedCode.

Release Date: Nov 24, 2025

Developer Anthropic  🇺🇸
Context Window 200k
Max Output Tokens 64k
Token Costs (in/out) $5.00/25.00
Weights Private
Input Modalities

Accuracy

66.15 %

Avg. Cost (In/Out)

$ 5.00 / $ 25.00

Latency

451 min 5 s

Vals Index
BenchmarksAccuracyRankings
Vals RSI Index

14.82%

24/25
MedCode

45.17%

±1.89
38/107
MedScribe

83.25%

±1.93
47/109
MortgageTax

68.68%

±0.91
14/98
SAGE

45.00%

±3.35
42/91
TaxEval v2

74.33%

±0.85
38/145
GPQA Diamond

79.55%

±2.46
71/138
LiveCodeBench

75.03%

±1.12
81/143
LegalBench

82.84%

±0.43
65/151
MMLU Pro

85.59%

±0.37
57/138
MMMU Pro

81.10%

±0.94
42/93
Terminal-Bench 2.0

58.43%

±5.25
10/67
Proprietary BenchmarksAcademic BenchmarksIndustry Partners
Vals
Default Provider : Anthropic
Temperature: 1
Top P: Default
Top K: Default
Max Output Tokens: 64,000
Compute Effort: high