AI Models Radarby Mahdi Taghizadeh
Compare releases Verified 25 Sept 2026
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Field
LifecycleGenerally available since 09 Jun 2026Generally available since 01 Sept 2026
ImpactMajorMajor
Change typeCapability expansionModel update
Capability shiftGeneral · Coding · MultimodalFable 5.1 is listed as the current Fable release in first-party Claude release notes and model documentation.
AvailabilityAPI + ClaudeAvailable through Claude and Anthropic platform surfaces according to first-party Claude documentation.
Access statusStatus: Tracked · Channel: API · Weights: Closed · Pricing: Known · Docs: SourceStatus: GA · Channel: API · Weights: Closed · Pricing: Unclear · Docs: Linked
Pricing signal$10 / $50 per 1MNo pricing change found in the indexed note.
Context signalNo context-window change found in the indexed note.No context-window change found in the indexed note.
ConfidenceInferredConfirmed
Capability expansionInferred

Claude Fable 5

ImpactMajor
LifecycleGA
Since 09 Jun 2026
ContextunknownAccessAPIWeightsclosedPrice$10 / $50 per 1MCheckInferred
Availability
StatusTrackedChannelAPIWeightsClosedPricingKnownDocsSource
Source qualityLaunch announcementFirst-party source · 1 receipt

Introduces a capability tier above Opus for complex, days-long and asynchronous tasks.

Open radar briefSource
Model updateConfirmed

Claude Fable 5.1

ImpactMajor
LifecycleGA
Since 01 Sept 2026
ContextunknownAccessAPIWeightsclosedPriceunknownCheckConfirmed
Availability
StatusGAChannelAPIWeightsClosedPricingUnclearDocsLinked
Source qualityProduct changelogStrong source · 3 receipts

Updates the tracked Claude frontier tier with canonical release-note and model-doc evidence instead of relying on the older Fable 5 entry.

Open radar briefSource