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Claude Sonnet 4.6

Claude Sonnet 4.6 is an AI model from Anthropic.

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

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Notes

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Attribution

Attribution policy →
Context
1M
Weights
Closed
API only
Input
$3
/1M tok
Output
$15
/1M tok
Blended
$6
#466/ 499/1M · 3:1
Speed
0
#103/ 498tok/s
Cache read
$0.30
0.10x input
Cache write
$3.75
1.25x input

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

Reasoning effortIndexSpeed
max30.10 t/s
Non-reasoning, high24.70 t/s
Non-reasoning, low23.30 t/s

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

Reported on 35 evals across 14 domains - best 92.2% on Infraresolutionbench · #1 of 35

Reported eval scores

35
Infraresolutionbench92.2
AutomationBench47.6
Ar Credit Release V147.2
Codenames1.4
MMMLU89.3
Terminal-Bench (Hard)53
LiveBench - Coding80
LiveBench - Reasoning86.4
LiveBench - Language77.7
LiveBench - Data Analysis76.1
LiveBench - Math86.5
IFBench56.6
LiveBench - Instruction Following63.9
TaxEval v277.1
CorpFin v265.3
MortgageTax67.7
Finance Agent (v2)51
LiveBench78.4
Humanity's Last Exam (HLE)33.6
Vals Index50.6

Head-to-heads

29

benchmark comparisons against other models

vs Gemini 3.1 Pro Preview32 shared evalsvs GPT-5.530 shared evalsvs Claude Opus 4.829 shared evalsvs Claude Opus 4.729 shared evalsvs Claude Fable 528 shared evalsvs Claude Opus 4.628 shared evalsvs GPT-5.428 shared evalsvs GPT-5.4 Mini28 shared evalsvs Kimi K2.527 shared evalsvs Qwen3.6 Plus26 shared evalsvs GLM 5.125 shared evalsvs Claude Sonnet 4.524 shared evalsvs GPT-5.224 shared evalsvs GPT-5 Mini23 shared evalsvs Claude Opus 4.523 shared evalsvs DeepSeek V3.223 shared evalsvs Grok 4.1 Fast22 shared evalsvs GPT-5 Nano20 shared evalsvs Claude 4 Sonnet20 shared evalsvs Gemini 2.5 Pro19 shared evalsvs GLM 4.719 shared evalsvs gpt-oss-120b18 shared evalsvs GPT-516 shared evalsvs GPT-4o14 shared evalsvs GPT-6 Astra13 shared evalsvs GPT-4.1 Mini12 shared evalsvs GPT-4.112 shared evalsvs GPT-4o-mini12 shared evalsvs GPT-4.1 Nano12 shared evals