Private AI
Frontier‑level coding and agentic performance. Claude Sonnet 4.5 leads on real‑world coding tasks and shows substantial gains in computer use, reasoning, and math. Designed for long‑horizon, multi‑step work across IDE + terminal workflows, large codebases, and complex agents — a drop‑in upgrade over previous Sonnet versions.
Added Sep 29, 2025
Context Window
1.0M
Max Output
64.0K
Avg output tokens (7d)
1.3K tokens
Input Price (Auto)
$3.00/1M
Output Price (Auto)
$15.00/1M
Cache Read (Auto)
$0.30/1M
Capabilities
Performance metrics and benchmarks
Sourced from Artificial Analysis.
Intelligence Index
29.3
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GPQA Diamond
Graduate-level scientific reasoning
72.7%
Better than 57% of models compared
HLE
Humanity's Last Exam
7.1%
Better than 51% of models compared
IFBench
Instruction-following benchmark
42.7%
Better than 45% of models compared
T²-Bench Telecom
Conversational AI agents in dual-control scenarios
70.5%
Better than 63% of models compared
AA-LCR
Long context reasoning evaluation
51.3%
Better than 58% of models compared
SciCode
Python programming for scientific computing
42.8%
Better than 80% of models compared
Terminal-Bench Hard
Agentic coding and terminal use
28.8%
AIME 2025
American Invitational Mathematics Examination 2025
37.0%
Better than 38% of models compared
MMLU-Pro
Professional and academic subject knowledge
86.0%
Better than 94% of models compared
Last updated Aug 4, 2026
Artificial AnalysisBetter than 71% of models compared
LiveCodeBench
Contamination-free coding benchmark
59.0%
Better than 65% of models compared
