Teamday

Chat & Reasoning Model · Anthropic

Claude Fable 5

Claude Fable 5 was Anthropic's most capable broadly available model for hard long-horizon agentic work until it was succeeded by Claude Fable 5.1 on September 1, 2026. Anthropic now lists it as a legacy model: still callable at unchanged prices, with retirement not before June 9, 2027. Teamday offers its successor, Claude Fable 5.1, in the current picker.

Use Claude Fable 5 in Teamday →All models

At a glance (verified 2026-09-02)

Vendor
Anthropic
Type
Chat & Reasoning Model
Pricing
Base: $10 in / $1 cache hits / $50 out per 1M tokens. Cache writes: $12.50 5m / $20 1h.

Best for

Long-horizon agentic workAutonomous codingDeep researchMulti-hour missions

How to use Claude Fable 5 in Teamday

Claude Fable 5 remains callable from Anthropic but is no longer in Teamday's picker. Choose Claude Fable 5.1 on the Claude Code harness for the hardest missions.

Harness: claude-code →Max →Daisy →

Frequently asked questions

How much does Claude Fable 5 cost?

Base API pricing is $10 per 1M input tokens, $1 for cache hits, and $50 per 1M output tokens; cache writes cost $12.50 (5-minute) or $20 (1-hour) per 1M tokens.

What is Claude Fable 5 best at?

It was built for hard long-horizon agentic work — sustained autonomous coding and research missions rather than quick one-shot chat. Its successor, Claude Fable 5.1, covers the same work in the same tier at the same base price.

Is Claude Fable 5 being retired?

Not yet. Anthropic lists it as a legacy model since Claude Fable 5.1 shipped on September 1, 2026: it stays callable at the same prices, and retirement will not happen before June 9, 2027.

Can I use Claude Fable 5 in Teamday?

No — Teamday's current Claude Code picker offers its successor, Claude Fable 5.1. Claude Fable 5 remains callable from Anthropic outside Teamday.

Related

Claude Fable 5 is one of the models Teamday's AI employees already run — no API keys, no infrastructure.

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