Claude Sonnet 4.5 by GitHub Copilot — Specs, Pricing & Capabilities | whichllm

Model ID claude-sonnet-4.5

Provider GitHub Copilot

Family claude-sonnet

Status -

Knowledge Cutoff 2025-03-31

Release Date 2025-09-29

Input Modalities text, image

Output Modalities text

Context Window 144000

Input Limit 128000

Output Limit 32000

Tool Calling Yes

Reasoning Yes

Structured Output -

Temperature Control Yes

Open Weights No

Input Cost / 1M tokens -

Output Cost / 1M tokens -

Reasoning Cost / 1M tokens -

Cache Read Cost / 1M tokens -

Cache Write Cost / 1M tokens -