# Claude Fable 5

Claude Fable 5 is an Anthropic language model released Jun 9, 2026; Anthropic's newest language model in our dataset is Claude Haiku 5.5. Proprietary, API access only. Anthropic's most capable model open to all customers when it launched on Jun 9, 2026, alongside the access-limited Claude Mythos 5; succeeded by Claude Fable 5.1. Verified against vendor sources on Oct 26, 2026.

Last verified: 2026-10-26 · Evidence: Reported · Canonical: https://theagenticweekly.com/models/claude-fable-5 · JSON: https://theagenticweekly.com/api/models/claude-fable-5

## Key facts

| Fact | Value | Source |
|---|---|---|
| Vendor | Anthropic |  |
| Released | Jun 9, 2026 | https://platform.claude.com/docs/en/release-notes/overview |
| API id | `claude-fable-5` | https://platform.claude.com/docs/en/release-notes/overview |
| Context window | 1,000,000 tokens (1M) | https://platform.claude.com/docs/en/release-notes/overview |
| Max output | 128,000 tokens | https://platform.claude.com/docs/en/release-notes/overview |
| Licence | Proprietary (API) | https://platform.claude.com/docs/en/about-claude/models/overview |
| Pricing | $10 in / $50 out per 1M tokens | https://platform.claude.com/docs/en/release-notes/overview |

## What we tested

Nothing yet. We have not run Claude Fable 5 ourselves, so every fact here is Reported from the sources below.

## Not verified, left out

- Input and output modalities were not captured from the release notes for this model.
- The price is stated in the release notes of its successor (Fable 5.1, "$10 / $50 ... the same as Claude Fable 5").

## Sources

- [Claude Platform release notes](https://platform.claude.com/docs/en/release-notes/overview)
- [Anthropic models overview](https://platform.claude.com/docs/en/about-claude/models/overview)

Data licence: CC BY 4.0. Data: Agentic Weekly (https://theagenticweekly.com), CC BY 4.0.