Anthropic Claude 4.5 Series

The Claude 4.5 models are governed by a proprietary license and are accessible via Anthropic's API and through major cloud platforms. The pricing is structured per million tokens (MTok). For Claude Opus 4.5, the rate is $5.00 per MTok for input and $25.00 per MTok for output. For Claude Sonnet 4.5, the pricing for its standard 200K context window is $3.00 per MTok for input and $15.00 per MTok for output. When using the extended 1M context window, the rates for Sonnet 4.5 increase to $6.00 per