AI model · Agent
Claude | Fable 5
Claude Fable 5 is a Mythos-class model from Anthropic, released in June 2026 and built for autonomous work and coding.
Anthropic
Claude | Fable 5
AgentHavincy- Provider
- Anthropic
- Type
- Agent
- Cost
- From 45 credits
Overview
What is Claude | Fable 5?
Claude Fable 5 is a Mythos-class model from Anthropic, released in June 2026 and built for autonomous work and coding. It is designed for long, ambiguous or highly multi-step tasks that used to need frequent human check-ins. It checks its own work and self-corrects along the way.
In Havincy, Fable 5 suits large requests: building a full content strategy, rolling out a campaign across all your networks or processing a large batch of documents. It accepts text, images and files, with a one-million-token context. For most uses, its successor Fable 5.1 is more concise and more capable.
Specs
Claude | Fable 5: specifications
- Publisher
- Anthropic
- Accepted inputs
- text, images, and files (PDF…)
- Context window
- 1,000,000 tokens
- Max response
- 128,000 tokens
- Available since
- June 09, 2026
- Cost in Havincy
- From 45 credits
Specs taken from the publisher’s public model page. See the documentation on OpenRouter
Use cases
What you can create with Claude | Fable 5
Content strategy
Positioning, pillars, formats and calendar built step by step from your brand universe.
Multi-network rollout
One message adapted for Instagram, TikTok, LinkedIn and YouTube, with each format’s constraints.
Volume work
Rewrite a whole catalog of product pages or descriptions in a consistent tone.
Monitoring and synthesis
Gather notes, articles and screenshots to extract content ideas ranked by priority.
Prompt examples
Prompts to try with Claude | Fable 5
Paste an example into Havincy, then adapt the subject, style and format to your project.
Build our content strategy for the next 6 months: pillars, formats, frequency and KPIs to track.
Adapt this product announcement for Instagram, TikTok, LinkedIn and YouTube Shorts, with a video script for each.
Rewrite these 40 product descriptions in our brand voice, keeping the technical details exact.
How it works
How to create with this model
- Describe the desired result in a Havincy conversation.
- Add a reference when the style, product, or character needs to be preserved.
- Generate, then ask for a variation or improvement without starting over.
FAQ
Frequently asked questions about Claude | Fable 5
What is a “Mythos-class” model?
That’s how Anthropic introduces Fable 5: a model built for long-running autonomous work, able to carry out tasks that would take a person hours or days, while checking and correcting its own work.
Is Claude Fable 5 free?
No, it’s a premium model ($10 per million input tokens and $50 per million output tokens on OpenRouter). In Havincy, a typical exchange costs about 45 credits from your plan.
Fable 5 or Fable 5.1?
Fable 5.1 improves on Fable 5 across the board and answers more briefly. Keep Fable 5 if your workflow is already tuned to it; otherwise, go with 5.1.
Can it analyze images and PDFs?
Yes: text, images and files as input, a one-million-token context and answers of up to 128,000 tokens.
More models to discover
A starting point for your next creation.
Ready to create with Claude | Fable 5?
Describe your idea in Havincy, then refine the result in the conversation.