Claude 4.5 Sonnet

The latest Claude 4.5 Sonnet model from Anthropic with a 1M token context window.

Model Specifications

Context window 1,000,000 tokens
Max output 200,000 tokens
Knowledge cutoff July 2025
Multipart messages No
Vision capabilities Yes

Default Parameters

Temperature 0.3
Top P 1.0
Frequency penalty 0.0
Presence penalty 0.0

Supported Parameters

Temperature

Supported

Controls randomness: Lower values make output more deterministic, higher values more creative.

Range: 0.0 - 1.0 Default: 0.3

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