Family · Anthropic
Claude Fable
Claude Fable is a model family from Anthropic. We track 2 versions: Claude Fable 5.1 and Claude Fable 5. Claude Fable 5.1 is the version we would evaluate first, and older versions stay listed so you can compare price and capability before deciding whether to move.
Comparing Claude Fable 5.1 with Claude Fable 5: Claude Fable 5.1 is listed at API: $10 in / $50 out per M tokens, while Claude Fable 5 is listed at API: $10 in / $50 out per M tokens. Newer versions usually improve reasoning, tool use and price, so unless you depend on the exact behavior of an older model, evaluate the newest version first and keep the older one only as a fallback.
Version comparison
| Version | Pricing | Free tier | Last reviewed | |
|---|---|---|---|---|
| Claude Fable 5.1 | API: $10 in / $50 out per M tokens | No | Sep 2026 | Read review → |
| Claude Fable 5 | API: $10 in / $50 out per M tokens | No | Sep 2026 | Read review → |
All Claude Fable versions
Claude Fable 5.1 is Anthropic's premium generally available model, priced above Opus and built for the hardest reasoning, coding and analysis tasks. Anthropic says the cheaper Opus 5.5 now matches it on most work, so Fable 5.1 makes most sense where the last f
Strength: Highest quality ceiling in the generally available Claude lineup Limit: $10 input and $50 output per million tokens
Claude Fable 5 is a premium-tier Claude model priced above Opus, aimed at the hardest professional and technical work. It has been followed by Claude Fable 5.1, which is the version most teams should evaluate today.
Strength: High ceiling on difficult, multi-step problems Limit: $50 per million output tokens is the top of the range
Frequently asked questions
Which Claude Fable version should I use?
Claude Fable 5.1 is the newest version we treat as current. Claude Fable 5.1 is Anthropic's premium generally available model, priced above Opus and built for the hardest reasoning, coding and analysis tasks.
Are older Claude Fable versions still available?
Many stay available through the vendor API or partner clouds for a while, but newer versions are usually cheaper or stronger. Each older version's page notes what replaced it.
How do Claude Fable versions differ on price?
Claude Fable 5.1: API: $10 in / $50 out per M tokens. Claude Fable 5: API: $10 in / $50 out per M tokens.