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.
Added Sep 29, 2025
Context Window
200.0K
Max Output
64.0K
Avg output tokens (7d)
516 tokens
Input Price (Auto)
$3.00/1M
Output Price (Auto)
$15.00/1M
Cache Read (Auto)
$0.30/1M
Capabilities
Benchmarks
Benchmarks
Performance metrics and benchmarks
Sourced from Artificial Analysis.
Intelligence Index
16.6
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 42% of models compared
Reasoning
HLE
Humanity's Last Exam
4.3%
Better than 19% 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
44.0%
Better than 42% of models compared
Last updated Sep 11, 2026
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