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Claude Fable 5

Model family: Claude
Claude Fable 5 is Anthropic’s most capable generally available Claude model as of its 09-06-2026 launch. It uses the same underlying model as Claude Mythos 5, but includes conservative safeguards that route some cybersecurity, biology, chemistry, or model-distillation requests to Claude Opus 4.8 instead. Anthropic positions Fable 5 as state-of-the-art across software engineering, knowledge work, vision, scientific research, memory, and long-context autonomous tasks, with its largest advantage appearing on longer and more complex workflows. It is intended for broad professional use where high-end reasoning, coding, document analysis, visual understanding, and agentic task execution are needed.
New Multimodal Gen 3
Released: June 9, 2026

Overview

Claude Fable 5 is Anthropic’s generally available Mythos-class Claude model for frontier reasoning, software engineering, knowledge work, vision, long-horizon tasks, and scientific research, with added safeguards for high-risk domains.

Pricing

Compare Claude Fable 5 with other models listed in the same vendor pricing tiers and context lengths.

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About Anthropic

Anthropic is a technology company specializing in artificial intelligence and machine learning solutions.

Industry: Artificial Intelligence
Company Size: 3673
Location: San Francisco, California, US
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Tools using Claude Fable 5

Last updated: June 9, 2026
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