Claude Sonnet 4.6

Name: Claude Sonnet 4.6
Author: Anthropic

Closed

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

Benchmark scores: frontiermathAA LiveBench osworld-org prime-hub OpenReward Vals AI EQ-Bench Lech Mazur

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Context

Input

/1M tok

Output

$15

/1M tok

Blended

#430/ 461/1M · 3:1

Speed

#93/ 461tok/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 effort	Index	Speed
Reasoning, max	48.4	0 t/s
Non-reasoning, high	36.8	0 t/s
Non-reasoning, low	35.1	49 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

Infraresolutionbench92.2

AutomationBench47.6

Ar Credit Release V147.2

Codenames1.4

MMMLU89.3

TaxEval v277.1

CorpFin v265.3

MortgageTax67.7

Finance Agent (v2)51

LiveBench - Coding80

Terminal-Bench (Hard)42.4

LiveBench - Reasoning86.4

LiveBench - Language77.7

LiveBench - Data Analysis76.1

LiveBench - Math86.5

IFBench42.4

LiveBench - Instruction Following63.9

LiveBench78.4

Humanity's Last Exam (HLE)11.2

Vals Index50.6