Claude Sonnet 4.5

anthropic

Claude Sonnet 4.5 is the newest model in the Sonnet series, offering improvements and updates over Sonnet 4.

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Capabilities

Tool Use

File Input

Extended Thinking

Image Input

Technical Specifications

Context Window

200,000 tokens

Max Output

64,000 tokens

Input Cost

$3 per 1M tokens

Output Cost

$15 per 1M tokens

File Input Limit

20 files

Files in Assistant Messages

Yes

Availability

Pro

Minimum plan required

$100 per month

Also available in these plans

Super
$200/mo