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Anthropic · Not released
Claude Fable 5.5 (2026): not released — the leaks, and the Fable 5.2 that did ship
As of November 13, 2026, Anthropic has not officially released Claude Fable 5.5: the name comes from October leaks (an Azure catalog screenshot and a LiteLLM entry that was removed a day later), while the model Anthropic actually released on November 9, 2026 is Claude Fable 5.2 at $8 / $40 per million tokens.
- Maker
- Anthropic
- Type
- Text
- Released
- Not released
- OpenRouter id
- None
Claude Fable 5.5 release date
Confirmed: Anthropic has given none. Rumoured: in mid-October a leaker expected it “next week”; instead Fable 5.2 was released on November 9, 2026.
Rumours, not confirmed
What people are saying about Claude Fable 5.5
Each item is what someone said, with who said it, where and when. None of it is confirmed by the maker; claims we found no source for are left out.
- UnconfirmedUsers on X said some Opus 5.5 requests were being routed to a new model; Chetaslua wrote “Claude Opus 5.5 is routing to a new model” and suggested it could be Fable 5.5 or a new Opus.Chetaslua (X), reported by Decrypt · said 2026-10-11 · decrypt.co · checked 2026-11-13
- UnconfirmedAn automated update to the LiteLLM model catalog added “azure_ai/claude-fable-5-5”, with price and limits copied from Fable 5.1; it was removed about a day later because Azure did not list the model.LiteLLM pull requests #46201 and #46332, reported by Kingy AI · said 2026-10-13 · kingy.ai · checked 2026-11-13
- UnconfirmedLyra posted “Partners got access to the upcoming Claude Fable 5.5” and expected a release the next week.Lyra (X), reported by TestingCatalog · said 2026-10-15 · testingcatalog.com · checked 2026-11-13
- UnconfirmedAlex Getman shared a screenshot of Fable 5.5 in Azure’s East US 2 catalog marked “Generally available”, with $10 / $50 per million tokens — the same values as Fable 5.1, which TestingCatalog says looked copied.Alex Getman (X), reported by TestingCatalog · said 2026-10-17 · testingcatalog.com · checked 2026-11-13
- UnconfirmedKim Isenberg (“Chubby”) said “Mythos 5.5 is already listed” in the HTML of Anthropic’s site, from an anonymous emailed tip; a live check reported by Decrypt showed only Mythos 5.1.Kim Isenberg (X), reported by Decrypt · said 2026-11-01 · decrypt.co · checked 2026-11-13
Checked
Claude Fable 5.5: confirmed so far
- Anthropic’s model overview has no Claude Fable 5.5 or Mythos 5.5; the newest Fable model it lists is Claude Fable 5.2.Source: platform.claude.com · checked 2026-11-13
- Anthropic released Claude Fable 5.2 on November 9, 2026 ($8 / $40 per million tokens); its announcement names Fable 5.2 and Mythos 5.2 and does not mention a 5.5.Source: anthropic.com · checked 2026-11-13
- OpenRouter’s model list has no claude-fable-5.5 (checked November 13, 2026).Source: openrouter.ai · checked 2026-11-13
Nearest available
Models you can use now instead of Claude Fable 5.5
Claude Fable 5.2
Anthropic$8 / $40 (per million tokens)
- Released on November 9, 2026 (Anthropic’s model page marks it "Latest").Source: platform.claude.com · checked 2026-11-13
- Anthropic describes it as "for demanding reasoning and long-horizon agentic work": hours-long agent tasks, multi-step deep research, and finished documents, spreadsheets and presentations.Source: platform.claude.com · checked 2026-11-13
- Context window 1M tokens; maximum output 128K tokens; text and image input, text output.Source: platform.claude.com · checked 2026-11-13
Claude Opus 5.5
Anthropic$4 / $20 (per million tokens)
- Released on September 22, 2026.Source: anthropic.com · checked 2026-11-13
- Anthropic’s overview: "for long-running agentic coding and knowledge work".Source: platform.claude.com · checked 2026-11-13
- Listed on OpenRouter as anthropic/claude-opus-5.5 since September 22, 2026, at $4 / $20 per million tokens.Source: openrouter.ai · checked 2026-11-13
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Chat
This chat starts with Claude Fable 5.2, not Claude Fable 5.5.
FAQ
Claude Fable 5.5 FAQ
Is Claude Fable 5.5 out?
Confirmed: no. Anthropic’s model overview lists Claude Fable 5.2 as its newest Fable model. Rumoured: in October users said partners had access and that Opus 5.5 requests were routed to a new model.
Is Fable 5.2 the same as Fable 5.5?
Confirmed: Anthropic has not said. Its November 9 announcement names Fable 5.2 and never mentions 5.5. Rumoured: several leak trackers treated “Fable 5.5” as a working label for the next Fable model; Kingy AI found no official statement of a rename.
When is the Claude Fable 5.5 release date?
Confirmed: Anthropic has given none. Rumoured: in mid-October a leaker expected it “next week”; instead Fable 5.2 was released on November 9, 2026.
How much would Claude Fable 5.5 cost?
Confirmed: no price. Rumoured: an Azure screenshot showed $10 / $50 per million tokens, the same values as Fable 5.1, so it was likely copied. Fable 5.2 costs $8 / $40.
What about Claude Mythos 5.5?
Confirmed: Anthropic lists Mythos 5.2 (the same model as Fable 5.2, limited to verified organisations), not 5.5. Rumoured: a claim that “Mythos 5.5” appeared in Anthropic’s site code was not borne out by a live check.
What can I use now instead?
Claude Fable 5.2, Anthropic’s newest Fable model, or Claude Opus 5.5 at half the price; each card above opens the chat with that model. Compare the two: Claude Fable 5.2 vs Claude Opus 5.5.
Is this an Anthropic page?
No. This page is unofficial and not affiliated with or endorsed by Anthropic.