Claude 4.5 Sonnet
Released · 55 days after Claude 4.1 Opus
Key info
Context window
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Max output
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Input price
$3.00 /1M
Output price
$15.00 /1M
Prices are the median across providers tracked by Artificial Analysis, not Opper billing.
Benchmarks
Independent benchmark scores: the Intelligence Index and the individual evaluations behind it, grouped by skill.
Intelligence Index (previous version)20.7
Agentic7.0
Coding
Terminal-Bench 4.0
0%
SciCode
46%
LiveCodeBench
71%
Agentic & knowledge work
AutomationBench
14%
GDPval
21%
GDP.pdf
5%
Briefcase (Elo)714
Terminal-Bench Hard
36%
τ²-Bench Telecom
78%
Science & reasoning
Humanity's Last Exam
18%
GPQA Diamond
83%
Long-context reasoning
72%
Knowledge
MMMU-Pro
69%
MMLU-Pro
88%
Math & instruction following
AIME 2025
88%
IFBench
57%
See full leaderboard →Benchmarks via Artificial Analysis · View on AA
Available routes
No routes currently available — Claude 4.5 Sonnet isn't routed through the Opper gateway right now. It's tracked here for its release history.
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