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Claude Opus 4.6

Claude Opus 4.6 is an AI model from Anthropic.

Publisher
Anthropic
Family
Claude
Context
1M
Input
Output
License
proprietary
Released
5 Feb 2026

Cite

Notes

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Attribution

Attribution policy →
Context
1M
Weights
Closed
API only
Input
$5
/1M tok
Output
$25
/1M tok
Blended
$10
#480/ 499/1M · 3:1
Speed
0
#103/ 498tok/s
Cache read
$0.50
0.10x input
Cache write
$6.25
1.25x input

Price & speed via Artificial Analysis · ranked across tracked models · caching via OpenRouter

Reasoning effortIndexSpeed
max31.90 t/s
Non-reasoning, high26.40 t/s

Intelligence Index per reasoning-effort setting, via Artificial Analysis · pricing identical across tiers

Reported on 39 evals across 15 domains - best 92.1% on τ²-bench (Tau²-bench) · #44 of 321

Reported eval scores

39
MRCRV293
Codenames2.1
AutomationBench56.1
Infraresolutionbench84.9
KellyBench88771
AIME202599.8
Autonomous Skill Evolution1.5
Skillsbench44.5
Thematic Generalization Benchmark80.6
LiveBench - Reasoning88.7
LiveBench - Language83.3
Terminal-Bench (Hard)46.2
LiveBench - Coding78.2
SWE-bench Multilingual72
LiveBench - Math89.3
LiveBench - Data Analysis69.9
IFBench53.1
LiveBench - Instruction Following63.3
LiveBench78.8
Humanity's Last Exam (HLE)39.9

Head-to-heads

29

benchmark comparisons against other models

vs GPT-5.433 shared evalsvs Gemini 3.1 Pro Preview31 shared evalsvs Kimi K2.531 shared evalsvs GPT-5.230 shared evalsvs Claude Opus 4.729 shared evalsvs Claude Sonnet 4.528 shared evalsvs GPT-5 Mini28 shared evalsvs GPT-5.528 shared evalsvs Claude Opus 4.828 shared evalsvs Claude Opus 4.528 shared evalsvs Claude Sonnet 4.628 shared evalsvs GLM 5.127 shared evalsvs Claude Fable 526 shared evalsvs DeepSeek V3.226 shared evalsvs Grok 4.1 Fast25 shared evalsvs GPT-5.4 Mini25 shared evalsvs Qwen3.6 Plus24 shared evalsvs GPT-5 Nano23 shared evalsvs Claude 4 Sonnet22 shared evalsvs Gemini 2.5 Pro21 shared evalsvs GLM 4.721 shared evalsvs GPT-519 shared evalsvs gpt-oss-120b19 shared evalsvs GPT-4o15 shared evalsvs GPT-4.1 Mini13 shared evalsvs GPT-4.113 shared evalsvs GPT-6 Astra13 shared evalsvs GPT-4o-mini12 shared evalsvs GPT-4.1 Nano12 shared evals