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Anthropic · No such model
Claude Opus 5.2 (2026): there is no such model — you probably mean Opus 5.5 or Fable 5.2
As of November 13, 2026, Anthropic has no model called Claude Opus 5.2: its model list has Claude Opus 5.5 (released September 22, 2026, $4 / $20 per million tokens) and Claude Fable 5.2 (released November 9, 2026, $8 / $40), and the name most likely mixes up those two.
- Maker
- Anthropic
- Type
- Text
- Released
- No such model
- OpenRouter id
- None
Rumours, not confirmed
What people are saying about Claude Opus 5.2
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.
- UnconfirmedBefore Opus 5.5 launched, developers reported a backend route named “Opus 5.2” in Claude Code that felt faster and more persistent than Opus 5; CometAPI itself said the model “remains unannounced”. Anthropic then released Opus 5.5 on September 22, and no Opus 5.2.Developers on X (one post linked to notjazii), reported by CometAPI · said 2026-09-15 · cometapi.com · checked 2026-11-13
Checked
Claude Opus 5.2: confirmed so far
- Anthropic’s model overview has no Claude Opus 5.2. Its latest models are Claude Fable 5.2, Claude Opus 5.5, Claude Sonnet 5.5 and Claude Haiku 5.5; the Opus models listed are Opus 5.5, Opus 5 and earlier 4.x versions.Source: platform.claude.com · checked 2026-11-13
- Anthropic’s prices: Claude Opus 5.5 $4 / $20 and Claude Fable 5.2 $8 / $40 per million input / output tokens.Source: platform.claude.com · checked 2026-11-13
- Anthropic says to start most work with Claude Opus 5.5 and calls Fable 5.2 “a step above Opus 5.5 in almost all the capabilities we evaluated”.Source: anthropic.com · checked 2026-11-13
- OpenRouter’s model list has no claude-opus-5.2 (checked November 13, 2026).Source: openrouter.ai · checked 2026-11-13
Nearest available
The models you probably mean by Claude Opus 5.2
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
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
Use it now
Chat
This chat starts with Claude Opus 5.5, not Claude Opus 5.2.
FAQ
Claude Opus 5.2 FAQ
Is there a Claude Opus 5.2?
Confirmed: no. Anthropic’s model overview lists Opus 5.5, Opus 5 and older Opus 4.x models, and no Opus 5.2. Rumoured: in mid-September developers reported an “Opus 5.2” route in Claude Code; Anthropic released Opus 5.5 instead.
Which one do I mean: Opus 5.5 or Fable 5.2?
Opus 5.5 is Anthropic’s recommended starting model, $4 / $20 per million tokens. Fable 5.2 is its higher tier for demanding reasoning and long agent tasks, $8 / $40. Anthropic suggests moving to Fable 5.2 when Opus 5.5 at higher effort still falls short. See the side-by-side: Claude Fable 5.2 vs Claude Opus 5.5.
What about Claude Mythos 5.2?
Confirmed: Anthropic says Fable 5.2 and Mythos 5.2 are the same model; Fable blocks high-risk cybersecurity and biology requests, and Mythos is limited to verified organisations.
Will there be an Opus 5.2 later?
Confirmed: Anthropic has announced nothing by that name. Rumoured: we found no current source expecting one; the September “Opus 5.2” reports came before Opus 5.5 shipped.
Can I try Opus 5.5 and Fable 5.2 here?
Yes, when the chat is open: each card above opens the chat with that model. Fable 5.2 replies cost more credits and use purchased credits only.
Is this an Anthropic page?
No. This page is unofficial and not affiliated with or endorsed by Anthropic.