Claude 4 Sonnet Thinking

Anthropic's Claude 4 Sonnet with the ability to show its thinking process step by step.

Reasoning
Vision
Native PDF input
Tool Calling
Structured Output

Added Feb 24, 2025

Pricing

Auto routing · per 1M tokens

Input: $3.00
Output: $15.00
Cache read: $0.30

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Specifications

Context window: 1M
Max output: 64K

Benchmarks

Artificial Analysis

LMArena

Vectara

Design Arena

Sourced from Artificial Analysis.

Intelligence Index

18.9

Better than 63% of models compared

Coding Index

37.6

Better than 44% of models compared

Agentic work

T²-Bench Telecom (legacy)

Legacy fallback · Conversational AI agents in dual-control scenarios

64.6%

Better than 59% of models compared

GDPval-AA v2

Economically valuable tasks (Elo)

680 Elo

Better than 32% of models compared

Document reasoning

AA-LCR v1.1

Long context reasoning with updated grading

70.3%

Better than 64% of models compared

Reasoning

HLE

Humanity's Last Exam

10.7%

Better than 52% of models compared

IFBench

Instruction-following benchmark

54.7%

Better than 66% of models compared

Coding

Terminal-Bench Hard (legacy)

Legacy fallback · Agentic coding and terminal use

31.1%

Better than 73% of models compared

LiveCodeBench

Contamination-free coding benchmark

65.5%

Better than 73% of models compared

Math

AIME 2025

American Invitational Mathematics Examination 2025

74.3%

Better than 70% of models compared

AIME

American Invitational Mathematics Examination

77.3%

Better than 87% of models compared

Math-500

Diverse mathematical problem solving benchmark

99.1%

Better than 98% of models compared

Knowledge

MMLU-Pro

Professional and academic subject knowledge

84.2%

Better than 88% of models compared

Legacy benchmarks

GPQA Diamond (legacy)

Graduate-level scientific reasoning

77.7%

Better than 63% of models compared

AA-LCR (unversioned / legacy)

Long context reasoning evaluation