Question 1

What is the cost of Claude Sonnet 4.5 by GitHub Copilot?

Accepted Answer

Claude Sonnet 4.5 by GitHub Copilot costs Free per 1M input tokens and Free per 1M output tokens.

Question 2

What is the context window of Claude Sonnet 4.5 by GitHub Copilot?

Accepted Answer

Claude Sonnet 4.5 by GitHub Copilot has a context window of 144K tokens. It supports up to 128K input tokens and can generate up to 32K output tokens.

Question 3

What are the capabilities of Claude Sonnet 4.5 by GitHub Copilot?

Accepted Answer

Claude Sonnet 4.5 by GitHub Copilot supports advanced reasoning, tool calling/function calling, adjustable temperature, file attachments. It has closed weights.

Question 4

What input and output types does Claude Sonnet 4.5 support?

Accepted Answer

Claude Sonnet 4.5 by GitHub Copilot accepts text, image as input and can generate text as output.

Question 5

Does Claude Sonnet 4.5 by GitHub Copilot support reasoning?

Accepted Answer

Yes, Claude Sonnet 4.5 by GitHub Copilot supports advanced reasoning capabilities.

Question 6

Is Claude Sonnet 4.5 by GitHub Copilot open source?

Accepted Answer

No, Claude Sonnet 4.5 by GitHub Copilot has closed weights. The model is only available through the GitHub Copilot API.

Question 7

Does Claude Sonnet 4.5 support function calling?

Accepted Answer

Yes, Claude Sonnet 4.5 by GitHub Copilot supports tool calling (also known as function calling), allowing it to interact with external tools and APIs during conversations.

Question 8

What is the knowledge cutoff date for Claude Sonnet 4.5?

Accepted Answer

Claude Sonnet 4.5 by GitHub Copilot has a knowledge cutoff date of 2025-03-31. This means the model was trained on data available up until that date.

Claude Sonnet 4.5 API

Input Modalities

Output Modalities

Standard (per 1M tokens)

Claude Sonnet 4.5 API

Input Modalities

Output Modalities

Standard (per 1M tokens)