Claude 4 Sonnet

Claude 4 Sonnet by Anthropic. A new generation model with improved capabilities, especially on programming and development. NOTE: Inputs > 200k tokens are charged at 2x input, 1.5x output rate.

Vision
Native PDF input
Tool Calling
Structured Output

Added Sep 29, 2025

Pricing

Auto routing · per 1M tokens

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

Compare provider prices

Specifications

Context window: 200K
Max output: 64K
Avg output (7d): 438 tokens; Longer than 38% of models

Benchmarks

Artificial Analysis

LMArena

Vectara

Sourced from Artificial Analysis.

Intelligence Index

16.6

Better than 59% of models compared

Agentic work

T²-Bench Telecom (legacy)

Legacy fallback · Conversational AI agents in dual-control scenarios

52.3%

Better than 53% of models compared

Document reasoning

AA-LCR v1.1

Long context reasoning with updated grading

44.0%

Better than 40% of models compared

Reasoning

HLE

Humanity's Last Exam

4.3%

Better than 18% of models compared

IFBench

Instruction-following benchmark

45.4%

Better than 52% of models compared

Coding

Terminal-Bench Hard (legacy)

Legacy fallback · Agentic coding and terminal use

27.3%

Better than 69% of models compared

LiveCodeBench

Contamination-free coding benchmark

44.9%

Better than 52% of models compared

Math

AIME 2025

American Invitational Mathematics Examination 2025

38.0%

Better than 39% of models compared

AIME

American Invitational Mathematics Examination

40.7%

Better than 64% of models compared

Math-500

Diverse mathematical problem solving benchmark

93.4%

Better than 74% of models compared

Knowledge

MMLU-Pro

Professional and academic subject knowledge

83.7%

Better than 86% of models compared

Legacy benchmarks

GPQA Diamond (legacy)

Graduate-level scientific reasoning

68.3%

Better than 45% of models compared

AA-LCR (unversioned / legacy)

Long context reasoning evaluation