Claude Fable 5
by Anthropic
Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning sup
Models
Claude Fable 5
Added 10 July 2026
Overview
Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning support and...
How to use / API access
Call via OpenRouter with model id `anthropic/claude-fable-5`.
- openrouter ·
anthropic/claude-fable-5Docs
OpenRouter id: anthropic/claude-fable-5
Benchmarks
- Intelligence Index (artificial-analysis): 49.6 index
- Coding Index (artificial-analysis): 76.5 index
- Agentic Index (artificial-analysis): 50.7 index
- Design Arena agenticgamedev (other): 1285 elo · #1
- Design Arena agentichtmlslides (other): 1254 elo · #1
- Design Arena agenticslides(html) (other): 1252 elo · #1
- Design Arena androidnative (other): 1297 elo · #2
Notes
Claude Fable 5 is listed in the EDNA Models directory from the OpenRouter catalogue.
In the AI Pulse
Recent daily briefs from the Enterprise DNA AI Pulse that mention this. The short daily read on what is actually happening in AI.
- AI Trends Pulse9 Sept 2026
GPT-6 Astra reshapes Agent Arena price frontier
- Frontier Labs Watch3 Sept 2026
Claude Fable 5.1 goes GA inside GitHub Copilot the same day Anthropic's infrastructure went down.
- Frontier Labs Watch2 Sept 2026
Anthropic's "cheaper" Fable 5.1 claim doesn't hold at real task-level cost
- Frontier Labs Watch22 Aug 2026
Anthropic's IPO chatter gets a date and a bigger number
- Frontier Labs Watch17 Aug 2026
Bank of America launches a standing Frontier AI Tracker.
- Frontier Labs Watch30 July 2026
A Silicon Valley backlash against Anthropic is building
- AI Trends Pulse27 July 2026
Moonshot AI ships Kimi K3, the largest open-weight model ever released
- Business Models & Winners27 July 2026
Anthropic forces Claude Fable 5 off included-usage onto metered credits, then delays the cutover twice
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