Claude Fable 5.2 Description

Claude Fable 5.2 is a frontier artificial intelligence model developed by Anthropic for advanced reasoning, autonomous software development, scientific discovery, and complex professional workflows. The model improves on Claude Fable 5.1 with stronger performance in programming, visual analysis, mathematical problem-solving, and agent-driven task execution. Its software engineering capabilities support large-scale codebase analysis, feature implementation, debugging, performance optimization, automated testing, and complex software migrations. Claude Fable 5.2 can coordinate multiple AI agents to complete long-running engineering projects and delegate simpler operations to smaller language models. The model also supports scientific research, hardware design, robotics-related reasoning, data analysis, and technical investigations that require iterative experimentation and evaluation. Configurable reasoning effort allows developers to balance computational cost, response time, and problem-solving depth according to task requirements. Anthropic reports a 49.1% score on FrontierCode 2.0, 69.9% on FrontierSWE v2, and 74.2% on Humanity's Last Exam with tools. Claude Fable 5.2 generates output up to 30% faster than its predecessor and offers an optional fast mode with up to 2.5 times faster generation, alongside safeguards for high-risk cybersecurity and biological research. The model is available through Claude applications, Claude Code, Anthropic's API, Amazon Web Services, Google Cloud, and Microsoft Azure, with standard API pricing of $8 per million input tokens and $40 per million output tokens.

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Pricing

Pricing Starts At:
$8 per 1M tokens (input)
Pricing Information:
$8 per million input tokens and $40 per million output tokens

Integrations

API:
Yes, Claude Fable 5.2 has an API
View Integrations

Reviews - 1 Verified Review

Total 5 out of 5 stars
ease 5 out of 5 stars
features 5 out of 5 stars
See More Reviews for Claude Fable 5.2 Write a Review

Company Details

Company:
Anthropic
Year Founded:
2021
Headquarters:
United States
Website:
claude.ai

Media

Claude Fable 5.2 Screenshot 1
Claude Fable 5.2 Screenshot 1
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Product Details

Platforms
Web-Based
Types of Training
Training Docs
Customer Support
Online Support

Claude Fable 5.2 Features and Options

Claude Fable 5.2 User Reviews

Write a Review
  • Name: Anonymous (Verified)
    Job Title: AI Developer
    Length of product use: Less than 6 months
    Used How Often?: Daily
    Role: User, Deployment
    Organization Size: 100 - 499
    Features 5 out of 5 stars
    Ease 5 out of 5 stars
    Pricing 4 out of 5 stars
    Likelihood to Recommend to Others 9 out of 10

    The frontier of the frontier

    5 out of 5 stars Date: Nov 09 2026

    Summary: Overall, Claude Fable 5.2 feels less like a normal assistant and more like a senior technical problem-solver. For difficult coding, deep research, long autonomous workflows, and projects where I care more about getting the right result than minimizing compute, it is one of the strongest models I have used.

    Positive: Fable 5.2 feels like the model I reach for when I have something genuinely difficult and do not want to babysit it the whole way through. The biggest upgrade for me is how well it handles ambiguous, long-running work. I can give it a messy engineering task or a loose idea and it does a much better job figuring out the path, delegating pieces, correcting itself, and actually getting to the finish line.

    Negative: My only complaint is that this is still a model I would save for the hard stuff. Anthropic itself recommends starting with Opus 5.5 for normal coding and knowledge work, then stepping up to Fable when the task really justifies it.

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