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Anthropic

Claude Fable 5

Claude Fable 5 is a Anthropic model with 1M context, $10 in / $50 out per million tokens, last verified October 1, 2026. Open weights: no. Status: Superseded since September 1, 2026; the current pick is Claude Fable 5.1. Public-board scores are linked to the publisher; vendor-only figures stay in the watch-out, not on the board.

Claude Fable 5 is Anthropic's June 2026 long-running-agent model, now 'Active (legacy)' behind Fable 5.1 at the same $10/$50 price.

Recorded profile verification October 1, 2026Individual provider fields may change

AI model specification details
SpecificationClaude Fable 5
ProviderAnthropic
TierFrontier
Context window1M
Max output128K
Input / 1M tokens$10
Output / 1M tokens$50
WeightsClosed
ParametersNot verifiedUnverified
Reasoning levelslow, medium, high, xhigh, max
Modalitiestext, image
API model idclaude-fable-5
ReleasedJune 9, 2026

Pricing tiers: Standard $10/$50 per MTok with no long-context surcharge. Cache reads $1; 5-minute writes $12.50 and 1-hour writes $20. Batch $5/$25. US-only inference adds 10% where supported. Adaptive thinking is always on, default effort high. Reliable knowledge cutoff Jan 2026; retirement not sooner than June 9, 2027. Access was suspended June 12 and restored July 1, 2026.

Best for

  • Long-running agents
  • Frontier reasoning
  • Enterprise work

Watch out

Superseded: Fable 5.1 has the same base input/output prices and lower cache-read pricing ($0.25 vs $1 per million tokens). Savings depend on eligible cached requests; evaluate the successor against your pinned workloads.

History

Claude Fable 5 timeline

Release and status events for this model that passed two-source verification — dated, sourced, and linked.

Source receipts

Catalog figures for this model were checked against the following sources.

Common questions

Claude Fable 5

Answered from the verified figures on this page rather than general guidance.

How much does Claude Fable 5 cost per million tokens?
Claude Fable 5 lists base rates of $10 per million input tokens and $50 per million output tokens. Estimate both input and output token volume and any additional charges for your workload. Standard $10/$50 per MTok with no long-context surcharge. Cache reads $1; 5-minute writes $12.50 and 1-hour writes $20. Batch $5/$25. US-only inference adds 10% where supported. Adaptive thinking is always on, default effort high. Reliable knowledge cutoff Jan 2026; retirement not sooner than June 9, 2027. Access was suspended June 12 and restored July 1, 2026.
What is Claude Fable 5's context window?
Claude Fable 5 accepts about 1M tokens of context. That only matters if you routinely send very long documents, large codebases, or multi-turn histories that approach that limit.
What is Claude Fable 5 best for?
Claude Fable 5 is a frontier tier from Anthropic. It suits long-running agents, frontier reasoning, enterprise work. Superseded: Fable 5.1 has the same base input/output prices and lower cache-read pricing ($0.25 vs $1 per million tokens). Savings depend on eligible cached requests; evaluate the successor against your pinned workloads.
Model comparison catalogBenchmark library