Claude Sonnet 4.6 is Anthropic's most capable Sonnet yet — a full upgrade across coding, computer use, long-context reasoning, agent planning, and design. Supports up to a 1M-token context window at Sonnet pricing.
Added Feb 17, 2026
Context Window
1.0M
Max Output
128.0K
Avg output tokens (7d)
439 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
24.7
Agentic work
T²-Bench Telecom (legacy)
Legacy fallback · Conversational AI agents in dual-control scenarios
79.5%
Better than 69% of models compared
Document reasoning
AA-LCR v1.1
Long context reasoning with updated grading
68.3%
Better than 64% of models compared
Reasoning
HLE
Humanity's Last Exam
13.3%
Better than 62% of models compared
IFBench
Instruction-following benchmark
41.2%
Better than 41% of models compared
Coding
Terminal-Bench Hard (legacy)
Legacy fallback · Agentic coding and terminal use
46.2%
Better than 93% of models compared
Legacy benchmarks
GPQA Diamond (legacy)
Graduate-level scientific reasoning
79.9%
Better than 67% of models compared
AA-LCR (unversioned / legacy)
Long context reasoning evaluation
68.3%
Better than 64% of models compared
Last updated Sep 15, 2026
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