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Claude Sonnet 4.5
Claude Sonnet 4.5
Anthropic · Frontier tier
Claude Sonnet 4.5
A
Anthropic
frontier
Release Date: Sep 29, 2025
1450
Arena Elo
83.4
GPQA
87
MATH
95
HumanEval
88.7
MMLU
55.8
SWE-bench
Try Claude Sonnet 4.5
Specifications
Context Window
200K tokens
Max Output
64K tokens
Input Price
$3 per million
Output Price
$15 per million
Release Date
September 29, 2025
Tier
Frontier
Capabilities
vision
tool-use
code
extended-thinking
Benchmarks
Arena Elo
1450
MMLU
88.7
GPQA
83.4
MATH
87
HumanEval
95
SWE-bench
55.8
Cost Estimate
Input Tokens
500K
Output Tokens
100K
Estimated Cost
$3.0000
Input: $1.5000
Output: $1.5000
Related Models
A
Claude Opus 4.6
Anthropic · Elo 1496
frontier
A
Claude Sonnet 4.6
Anthropic · Elo 1470
frontier
A
Claude Opus 4.5
Anthropic · Elo 1467
frontier
A
Claude Haiku 4.5
Anthropic · Elo 1404
mid
Compare With
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Claude Sonnet 4.5 vs Claude Sonnet 4.6