Next Mythos-Class Model release date

The deadline hierarchy suggests that Anthropic’s access policy has become the market’s timing signal for another Mythos-class release. The key inference is that regulatory approval and controlled partner deployment could produce a qualifying announcement during August or September, while the existing model’s restricted status makes an immediate follow-on release difficult to establish.

The curve concentrates the release window in August

July 31 trades at 0.9%, compared with 43% for August 31 and 72.5% for September 30. Assuming these binaries are interpreted cumulatively, the 42.1-point jump into August identifies that month as the first meaningful window. September contributes another 29.5 points, while the remaining 27.5 points represent scenarios in which no qualifying release occurs by the final deadline.

This distribution fits a staged process: access restrictions ease, trusted organizations test the system, and Anthropic then announces either a successor or a newly available Mythos-class product. That sequence is a market inference. Anthropic has disclosed partner expansion and access changes, though it has not supplied a release schedule for another model in the provided record.

The June launch makes model definition the hidden variable

Anthropic publicly launched Claude Fable 5 on June 9, describing it as a Mythos-class model made safe for general use. It also said Claude Mythos 5 uses the same underlying model, with cyber safeguards lifted, and initially limited Mythos 5 to vetted partners. Those facts establish Anthropic’s ownership of the category while complicating what constitutes the “next” release.

The resolution criteria explicitly cite the June 9 Fable 5 release. The deadline prices therefore rely on an implicit assumption that settlement requires a subsequent event. The supplied rules do not specify whether expanded access, a renamed configuration, or a new underlying model would qualify. A formal resolution clarification could change the entire curve because every listed deadline falls after the cited launch.

Restrictions separate rollout timing from model creation

On June 12, Anthropic said a U.S. government directive required it to suspend Fable 5 and Mythos 5 access for foreign nationals, leading the company to disable access for all customers. Anthropic later said Mythos 5 export controls were lifted on July 1 and access was restored for a set of U.S. organizations.

This sequence supports the late-window thesis by showing that distribution can change within weeks of a policy decision. Broader authorization could create the conditions for a public product announcement. It does not establish that a separate model is ready. Regulatory progress therefore confirms the access component of the thesis while providing limited evidence about a successor’s development schedule.

Specific announcements would define the August-September thesis

The strongest hypothetical repricing catalysts would resolve either timing or definition:

• An Anthropic announcement explicitly describing a new system as Mythos-class and providing a release date.
• A new transparency-hub entry with a distinct model name, system documentation, or knowledge cutoff.
• A broader government authorization followed by availability outside the current trusted-access group.
• Resolver guidance stating whether partner access expansions qualify as releases.

The opposite evidence would include renewed government restrictions, Anthropic continuing to identify Fable 5 and Mythos 5 as its only Mythos-class offerings, or a rules clarification requiring a genuinely new underlying model. Each would weaken the inferred link between access restoration and a near-term qualifying release.

Anthropic’s own taxonomy provides the strongest counter-signal

Anthropic says Fable 5 and Mythos 5 are the same underlying model. Its transparency hub gives Mythos 5 a January 2026 knowledge cutoff and describes availability as limited to selected partners for defensive cybersecurity and biological purposes. This supports a slower interpretation: Fable and Mythos may represent safeguard and access configurations within one generation, leaving another qualifying release dependent on a genuinely new model.

Project Glasswing’s expansion to roughly 150 organizations across more than fifteen countries before the June launch shows an established partner pipeline. It can support further deployment announcements, though deployment alone may fail the market’s release test. With $80.56K in volume, $25.57K in open interest, and $14.16K in liquidity, a definitive Anthropic statement or resolution ruling could produce a substantial adjustment relative to available liquidity.

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