AI model · Agent
Claude | Fable 5.1
Claude Fable 5.1, released in September 2026, improves on Claude Fable 5 across the board.
Anthropic
Claude | Fable 5.1
AgentHavincy- Provider
- Anthropic
- Type
- Agent
- Cost
- From 45 credits
Overview
What is Claude | Fable 5.1?
Claude Fable 5.1, released in September 2026, improves on Claude Fable 5 across the board. According to Anthropic, the biggest gains are in long-running autonomous tasks, analysis work (finance, research) and visual code generation. It is also more concise than Fable 5 in its plans and summaries.
In Havincy, pick Fable 5.1 for heavy requests: auditing a whole account, producing a complete editorial plan, summarizing several documents or writing a consistent series of posts in one go. It reads text, images and files, with a one-million-token context.
Specs
Claude | Fable 5.1: specifications
- Publisher
- Anthropic
- Accepted inputs
- text, images, and files (PDF…)
- Context window
- 1,000,000 tokens
- Max response
- 128,000 tokens
- Available since
- September 01, 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 5.1
Content audit
Share your last 30 posts and their stats: Fable 5.1 finds the topics, formats and times that perform.
Quarterly editorial plan
A quarter of multi-network posts, with content pillars, cadence and visual ideas, in a single request.
Document synthesis
Market studies, customer feedback or agency briefs turned into concrete decisions for your content.
Consistent series
Write a full series (10 carousels, a month of newsletters) with the same thread and tone throughout.
Prompt examples
Prompts to try with Claude | Fable 5.1
Paste an example into Havincy, then adapt the subject, style and format to your project.
Here are our last 30 posts with their stats. Tell me what works, what doesn’t, and plan next month.
From these three attached studies, sum up what our customers expect in 5 points and turn them into content ideas.
Write a series of 10 LinkedIn carousels about our method, one per step, with title, slides and caption.
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 5.1
What’s the difference between Claude Fable 5.1 and Fable 5?
Fable 5.1 improves everywhere, especially on long tasks, analysis and visual code, and it is more concise in its plans and summaries. Anthropic recommends it as a drop-in replacement for Fable 5.
How much does Claude Fable 5.1 cost in Havincy?
A typical exchange (about 12,000 tokens read and 4,000 written) costs roughly 45 credits. The publisher price through OpenRouter is $10 per million input tokens and $50 per million output tokens, so keep it for requests that deserve it.
Claude Fable 5.1 or GPT 6 Astra?
Both target long, demanding work. Fable 5.1 stands out on analysis and concise summaries, GPT 6 Astra on end-to-end tasks involving research and document creation. Try both on your brief: the Chat’s picker lets you switch at any time.
Do I need a Claude subscription to use it?
No. In Havincy, Fable 5.1 is available from the Chat’s model picker and uses your Havincy credits, with no API key.
More models to discover
A starting point for your next creation.
Ready to create with Claude | Fable 5.1?
Describe your idea in Havincy, then refine the result in the conversation.