Primary source: https://www.businessinsider.com/anthropic-mythos-latest-ai-model-too-powerful-to-be-released-2026-4?utm_source=chatgpt.com
Resolution criteria
This market resolves to YES if:
Anthropic releases a model explicitly named "Claude Mythos" (or simply "Mythos") to the public. Version numbers do not matter. (So "Claude Mythos 5.0" will still count)
Anthropic releases a new model, previously referred to as a "Mythos-class" model, that is officially branded and released to the public under the name "Mythos".
This market resolves to NO if neither condition is met by Jan 1, 2028, or if Anthropic permanently shutters the project without such a release.
Official resolution will be determined by public announcements via the official Anthropic News page or their official corporate communications.
Background
In April 2026, reports emerged that Anthropic had developed a highly capable AI model internally referred to as "Mythos," which was deemed too powerful for public release at that time. Anthropic has indicated that this specific iteration will not be released to the public. However, the company has suggested that future "Mythos-class" models—models possessing similar architectural or performance characteristics—may be developed and released openly. This market tracks whether the "Mythos" branding is eventually applied to a publicly available release, either through the original model or a successor.
This description was generated by AI. Review and verify everything here yourself. You can edit, replace, or delete any part of this description, including the resolution criteria. You do not need to trust the AI output.
Update 2026-06-09 (PST): This market now asks if another model named Mythos is publicly released before 2028.
1,000People are also trading
https://www.anthropic.com/news/claude-fable-5-mythos-5 - public gets Fable. Mythos is for "a small group of cyberdefenders and infrastructure providers" and therefore is not public.
@MaxA there is still 1.5 years remaining for them to make Mythos public for this market to resolve YES
@Mochi Sure, but there is no reason for them to change the name of the public version of that class of model from Fable to Mythos.
@Mochi This market asks for a "Mythos-class" model, not a hypothetical version of Mythos released to public, so Favle IS what this market is thinking of.
@NayutaIto how can this market resolve to NO already when the description literally says it resolves to NO by 2028? “This market resolves to NO if neither condition is met by Jan 1, 2028, or if Anthropic permanently shutters the project without such a release.”
@NayutaIto how does it only represent a partial scenario? The description is incredibly straightforward and non ambiguous.
@Mochi ah... Fair point. I will unresolved and you are going to wait another 1.5 years for Mythos public release.
@NayutaIto thanks, it’s entirely possible they release the Mythos named model in the future to public once they deem the safety issue no longer a concern or mitigated