AI Models RadarAnthropic · 01 Sept 2026
Claude Fable 5.1
Anthropic’s updated Fable tier for sustained frontier coding and demanding knowledge work.
High-signal launch with broad capability, access or platform-level implications.
Release is backed by first-party product or API change documentation.
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Where Claude Fable 5.1 sits.
Model lifecycle
Know whether it is ready—and when it is leaving.
Radar tracks the model’s current access stage separately from its original announcement, including official retirement dates and recommended replacements when the lab publishes them.
Available through a public product or API channel.
- Status since
- 01 Sept 2026
Change Lens
What actually changed.
Normalized from the release note so different labs can be compared by the same fields, not just by launch copy.
General · Coding · Multimodal
Evidence is first-party; comparison labels are normalized by Radar.
Release is backed by first-party product or API change documentation.
Strong source · 1 receiptSource receipts
Evidence behind the brief.
The Radar keeps claims traceable: first-party sources, normalized fields, unknowns and the latest verification marker used for this page.
Pricing, Context are not clearly specified in the indexed source note.
Replaces the original Fable 5 entry with the current first-party model version.
This brief links back to the first-party announcement or documentation used by the radar.
Open original source