Fable 5.1 on Merge Gateway

Claude Fable 5.1, the latest in @AnthropicAI's Mythos model class, is now generally available in GitHub Copilot. In our testing it showed strong performance on ➡️ long-running coding tasks ➡️ deep codebase research ➡️ complex agentic workflows Try it out in the GitHub Copilot Show more

11:51 PM · Sep 1, 2026

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Xfable 5 1claude

Sep 2, 2026

Fable 5.1 in GitHub Copilot

Fable 5.1 in Copilot, the CLI, and VS Code. First-party from GitHub.

Pranit

@fazxes

Claude Fable 5.1 just dropped. It’s now available in fx.sh

7:34 PM · Sep 1, 2026

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Xfable 5 1claude

Sep 2, 2026

Fable 5.1 on fx.sh

Fable 5.1 on fx.sh the day it dropped. First-party from the builder.

Matthew Jörke

@mjoerke

I built thimble, an open source Claude Code plugin that makes it easy to understand what agents did. It adds explainers and interactive visualizations in your terminal. If Claude Code is for building, thimble is for understanding. Install thimble here! github.com/safety-researc…

4:22 PM · Nov 10, 2026

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Xclaudedeveloper tools

Nov 10, 2026

Thimble

Open source Claude Code plugin that explains what an agent did, with visualizations in the terminal.

ClaudeDevs

@ClaudeDevs

Fable 5.2 is now available in the Claude Platform and Claude Code. It’s up to 30% faster than Fable 5.1, and costs $8/$40 per 1M tokens, down from $10/$50.

Claude

@claudeai

Introducing Claude Fable 5.2 and Claude Mythos 5.2, designed to tackle the most daunting technical challenges. They’re capable collaborators on ambitious projects in many fields, and show improvements in areas like coding, reasoning, and vision.

7:04 PM · Nov 9, 2026

11.1K

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Xfable 5 2claude

Nov 9, 2026

Fable 5.2 in Claude Code

Fable 5.2 in the Claude Platform and Claude Code. Faster than Fable 5.1, at a lower token price.