Will the next Claude Opus model be released by September 30, 2026?

ResolutionResolved YES

YES payout100¢

NO payout0¢

VenuePolymarket

Realized · held to resolution+82%$100 paper stake

Polymarket55¢ → 100¢

Our position · YES55¢ → 100¢

Signal endedSep 22

Forecast updated

Sep 2 forecast

Anthropic’s rapid recent Opus cadence leaves room for another launch, so the next Claude Opus becoming publicly available by September 30 is likely.

Current visible evidence does not yet resemble an imminent launch: official documentation still lists Claude Opus 5, Anthropic has confirmed no successor or release date, and its September 1 launches used other model names. A September release is nevertheless likely because Anthropic shipped successive Opus versions at short intervals this year, pre-release evaluations have resumed, and almost the entire month remains. Rumored early-access identifiers provide weak corroboration but are not central to the outlook.

Points to YES

Anthropic’s recent Opus releases establish a rapid update cadence that can accommodate another version during September.
By July 24, 2026, Anthropic had released Claude Opus 4.7, Opus 4.8, and Opus 5 within roughly three months.
Resumed internal and external cyber evaluations remove one potential bottleneck for a pre-release model.
On August 31, 2026, Anthropic reported that internal and external cyber evaluations had resumed under new containment, monitoring, and operating practices.
Circulating early-access identifiers offer limited evidence that an unannounced model may be in testing.
By August 31, 2026, developer communities had circulated two alleged early-access identifiers, although Anthropic had not confirmed either one.

Points to NO

Anthropic’s official documentation shows no public staging page for an Opus successor.
As of August 30, 2026, Anthropic’s documentation still listed Claude Opus 5 as current and contained no Opus 5.1 model page.
Anthropic’s latest model launch focused on Fable and Mythos rather than extending the Opus line.
On September 1, 2026, Anthropic announced Claude Fable 5.1 and Claude Mythos 5.1 without announcing a new Opus model.

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