Anthropic
Claude Fable
Current
5.2
shipped 3d · 7 Nov 2026
Anthropic Mythos-tier frontier model tuned for long-horizon autonomous workflows.
Specification
- Current
- 5.2
- Availability
- Listed; see source
Modalities: text, image, code, tool use
Claude Fable — 6-Axis Capability Radar
HEURISTIC ESTIMATEThese scores are rough estimates from category presets, catalog specs, and keywords in release notes. They are not measured benchmarks or test results. Catalog prices and context windows may refer to a different model variant.
Hover or tap an axis to inspect its estimate
Shipping Cadence & Next Drop Forecast
This is an uncalibrated estimate from limited catalog history. A ratio of 100% means one estimated interval has elapsed; it is not a probability. Next-release dates and versions remain unconfirmed.
76 days
±12d variance4 days
Shipped on 2026-11-074.8 drops/yr
2 observed intervals · limited history2027-01-22
Next version: UnannouncedOptional AI cadence commentary
Summarize the recorded history and its limitations. Future releases remain unconfirmed.
Model Version Capability Delta
AI-synthesized architectural jumps, parameter scaling, and capability shifts across releases.
Ready to analyze Claude Fable v5.1 vs v5.2
Click Synthesize Diff to analyze latent space adjustments, resolution leaps, parameter shifts, and migration caveats via Gemini 3.8 Flash.
Version history
3 releases tracked
5.2
minor7 Nov 2026 · 3dClaude Fable 5.2 is listed on OpenRouter.
- First listed 2026-11-07 as anthropic/claude-fable-5.2.
- Platform listing, not a lab announcement. See the source for availability and details.
First listedSpecific source link · unverified ↗5.1
minor4 Sept 2026 · 2moFable 5.1 expands multi-agent alignment and complex scientific theorem proving.
- Pinnacle intelligence tier exceeding Opus in sustained mathematical rigor.
- Strict safety evaluations and verified cyber-safeguards.
Recorded announcementGeneral link · release source needed ↗5
major9 Jun 2026 · 5moFable 5 ships as Anthropics premier Mythos-class intelligence engine.
- Designed specifically for multi-day uninterrupted agentic task planning.
- Introduced prior to the Opus 5 release window.
Recorded announcementGeneral link · release source needed ↗