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Chat model · Anthropic

Claude Fable 5.1New

Included in Pro · came out August 2026

For long projects you want to get right, from start to finish

Claude Fable 5.1 is newer than Claude Fable 5, from the Fable tier that sits above Opus in Anthropic's Claude family. It suits projects that take real effort, where a careful answer matters more than a fast one.

Chat with Claude Fable 5.1 See how it compares

Claude Fable 5.1 in numbers

What it knows about

Up to June 2026

It learned from information up to June 2026. For anything newer it can search the web and show you where it found it.

What you can give it

  • Your wordsYes
  • PhotosYes
  • PDFs and filesYes
  • The webYes

Real answers

See how Claude Fable 5.1 answers

We asked it the same everyday questions as every other model in chatmodel, one try each. This is exactly what came back.

My neighbour watered my plants for two weeks while I was away. Write a short, warm thank-you note I can leave with a small gift. Keep it under 80 words.

Dear [Name],

Thank you so much for looking after my plants while I was away. I came home to find everything green and thriving—clearly in far better hands than my own! It's such a comfort to have a neighbour like you. Please enjoy this small token of my appreciation, and let me know if I can ever return the favour.

With warm thanks, [Your name]

Answered in about 6 seconds · 65 words

Ask it yourself

The Claude family in chatmodel

Claude Fable 5.1 is the newest one. Ordered by release date.

  1. February 2026Claude Sonnet 4.6
  2. April 2026Claude Opus 4.7
  3. May 2026Claude Opus 4.8
  4. June 2026Claude Sonnet 5
  5. July 2026Claude Fable 5
  6. July 2026Claude Opus 5
  7. August 2026NewestClaude Fable 5.1You're here

What it's good for

Try it with one of these

Press “Try this” and chatmodel opens with Claude Fable 5.1 selected and the message already written. Change any word you like.

Plan a family cookbook

“I want to make a family cookbook with recipes from my mother, my aunts and my own. Help me plan the chapters, what to include with each recipe, and how to collect stories from the family.”

Try this

Checklist for care home visits

“My mother, 88, may need to move into a care home. Search for what experts suggest looking for, then give me a checklist for visits and the questions to ask the staff.”

Try this

Write a firm complaint

“I'll upload the receipts, emails and photos about a new sofa that arrived damaged and was never replaced. Write a firm, polite complaint with a clear timeline and what I want them to do by when.”

Try this

Plan a 40th anniversary party

“Help me plan a surprise 40th wedding anniversary party for my parents, about 50 guests, in a village hall. Give me a timeline for the next two months, a budget checklist and a short speech idea.”

Try this

In plain words

Claude Fable 5.1 is a chat assistant from Anthropic. It’s newer than Claude Fable 5, and Fable sits a step above Opus among the Claude models in chatmodel.

It thinks before it answers, reads PDFs, understands photos and can search the web. People tend to reach for it when a project has many parts and they want a helper that keeps them all straight.

How to get the most out of it

  1. Start with a plan. Ask it to break the project into steps, then tackle one step per message.
  2. Keep one chat per project. It remembers what you said earlier in the same chat.
  3. Share the evidence. For complaints and claims, upload every receipt and email, not just a summary.
  4. Tell it your deadline so the plan works backwards from the date that matters.

How it compares with its siblings

Claude Fable 5 is the version before it. Claude Opus 5 is careful too and often enough for most jobs. For everyday tasks, Claude Sonnet 5 is quicker.

When to pick another model

For quick writing help, open Help me write. For long documents, try the PDF chat tool. For a trip, the plan a trip guide has ready messages. To compare with ChatGPT, read ChatGPT vs Claude.

How it compares

Claude Fable 5.1 vs Claude Opus 5: which Claude should you use? Claude Fable 5.1 or Claude Opus 5? We gave both the same 8 everyday tasks. See the real answers side by side, the winner of each round and which to use. GPT 6 Astra vs Claude Fable 5.1: OpenAI and Anthropic, head to head OpenAI's GPT 6 Astra against Anthropic's Claude Fable 5.1 on the same 8 everyday tasks. See both real answers, the winner of each round and which to pick.

Other models worth a look

Claude Fable 5

Anthropic

Read the guide

Claude Opus 5

Anthropic

Read the guide

Claude Sonnet 5

Anthropic

Read the guide

Frequently asked questions

Claude Fable 5.1 or Claude Fable 5?

Fable 5.1 is the newer version. If you're unsure, start with 5.1. You can always try the same message on both.

Can it search the web?

Yes. It can look things up when your question needs recent information. Open the sources for anything important.

Can it read PDFs and photos?

Yes. You can upload documents and photos and ask questions about them.

Is it slower than other Claude models?

It can be, because it's one of the most thorough. That's why it suits big jobs more than quick questions.

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