Question 1

What is the cost of Claude Fable 5.1 by GitHub Copilot?

Accepted Answer

Claude Fable 5.1 by GitHub Copilot costs $10.00 per 1M input tokens and $50.00 per 1M output tokens. Cached reads cost $0.25 per 1M tokens. Cache writes cost $12.50 per 1M tokens.

Question 2

What is the context window of Claude Fable 5.1 by GitHub Copilot?

Accepted Answer

Claude Fable 5.1 by GitHub Copilot has a context window of 1.0M tokens. It supports up to 1.0M input tokens and can generate up to 128K output tokens.

Question 3

What are the capabilities of Claude Fable 5.1 by GitHub Copilot?

Accepted Answer

Claude Fable 5.1 by GitHub Copilot supports advanced reasoning, tool calling/function calling, file attachments. It has closed weights.

Question 4

What input and output types does Claude Fable 5.1 support?

Accepted Answer

Claude Fable 5.1 by GitHub Copilot accepts text, image, pdf as input and can generate text as output.

Question 5

Does Claude Fable 5.1 by GitHub Copilot support reasoning?

Accepted Answer

Yes, Claude Fable 5.1 by GitHub Copilot supports advanced reasoning capabilities.

Question 6

Is Claude Fable 5.1 by GitHub Copilot open source?

Accepted Answer

No, Claude Fable 5.1 by GitHub Copilot has closed weights. The model is only available through the GitHub Copilot API.

Question 7

Does Claude Fable 5.1 support function calling?

Accepted Answer

Yes, Claude Fable 5.1 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 Fable 5.1?

Accepted Answer

Claude Fable 5.1 by GitHub Copilot has a knowledge cutoff date of 2026-06. This means the model was trained on data available up until that date.

Claude Fable 5.1 API

Input Modalities

Output Modalities

Standard (per 1M tokens)

Caching (per 1M tokens)