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icon for Next Mythos-Class Model released by…?

Next Mythos-Class Model released by…?

icon for Next Mythos-Class Model released by…?

Next Mythos-Class Model released by…?

$1,610,904 Vol.

Sep 4, 2026
Polymarket

$1,610,904 Vol.

Polymarket

July 31

$42,074 Vol.

No

August 31

$380,204 Vol.

No

September 1

$430,301 Vol.

Yes

September 2

$124,191 Vol.

Yes

September 4

$84,396 Vol.

Yes

September 3

$28,737 Vol.

Yes

September 7

$34,516 Vol.

Yes

September 9

$119,643 Vol.

Yes

September 15

$96,677 Vol.

Yes

September 30

$221,404 Vol.

Yes

October 31

$48,762 Vol.

Yes

On June 9, 2026, Anthropic released the Mythos-class model Claude Fable 5. This market will resolve to "Yes" if Anthropic releases the next Mythos-class model and makes it available to the general public by the listed date (ET). Otherwise, this market will resolve to "No." Any model whose official name includes “Mythos,” or that Anthropic officially describes as a “Mythos-class” model or similar, will qualify for this market’s resolution. For this market to resolve to "Yes," the qualifying model (as defined above) must be launched and publicly accessible, including via open beta or open rolling waitlist signups. A closed beta or any form of private access will not suffice. The release must be clearly defined and publicly announced by Anthropic as being accessible to the general public. If a qualifying model is made publicly accessible and labeled with the relevant version name within the company’s official website, this will qualify as “publicly announced”. Labeling errors, placeholder text, or version names displayed on the website that do not correspond to a model that is actually accessible to the general public under the rules will not qualify. The primary resolution source for this market will be official information from Anthropic; however, a consensus of credible reporting will also be used.Anthropic’s September 1 announcement of Claude Mythos 5.1, an incremental update to the Mythos-class large language model with targeted gains in cybersecurity and biology benchmarks, is the dominant factor shaping trader consensus on the next release. This follows the June 2026 launch of Claude Mythos 5 (restricted via Project Glasswing) and the more widely available Fable 5 variant, which established the current capability baseline after earlier preview access. Regulatory approvals that restored limited U.S. partner access in July, combined with Anthropic’s roughly 12-week frontier cadence and ongoing emphasis on safety guardrails, underpin strong implied probability for near-term resolution. Key swing factors include potential expansions of trusted-access programs, any redefinition of “general public” availability, or competitive pressure from other labs’ model updates.

On June 9, 2026, Anthropic released the Mythos-class model Claude Fable 5.

This market will resolve to "Yes" if Anthropic releases the next Mythos-class model and makes it available to the general public by the listed date (ET). Otherwise, this market will resolve to "No."

Any model whose official name includes “Mythos,” or that Anthropic officially describes as a “Mythos-class” model or similar, will qualify for this market’s resolution.

For this market to resolve to "Yes," the qualifying model (as defined above) must be launched and publicly accessible, including via open beta or open rolling waitlist signups. A closed beta or any form of private access will not suffice. The release must be clearly defined and publicly announced by Anthropic as being accessible to the general public.

If a qualifying model is made publicly accessible and labeled with the relevant version name within the company’s official website, this will qualify as “publicly announced”. Labeling errors, placeholder text, or version names displayed on the website that do not correspond to a model that is actually accessible to the general public under the rules will not qualify.

The primary resolution source for this market will be official information from Anthropic; however, a consensus of credible reporting will also be used.
Volume
$1,610,904
End Date
Sep 30, 2026
Market Opened
Aug 28, 2026, 4:18 AM ET
On June 9, 2026, Anthropic released the Mythos-class model Claude Fable 5. This market will resolve to "Yes" if Anthropic releases the next Mythos-class model and makes it available to the general public by the listed date (ET). Otherwise, this market will resolve to "No." Any model whose official name includes “Mythos,” or that Anthropic officially describes as a “Mythos-class” model or similar, will qualify for this market’s resolution. For this market to resolve to "Yes," the qualifying model (as defined above) must be launched and publicly accessible, including via open beta or open rolling waitlist signups. A closed beta or any form of private access will not suffice. The release must be clearly defined and publicly announced by Anthropic as being accessible to the general public. If a qualifying model is made publicly accessible and labeled with the relevant version name within the company’s official website, this will qualify as “publicly announced”. Labeling errors, placeholder text, or version names displayed on the website that do not correspond to a model that is actually accessible to the general public under the rules will not qualify. The primary resolution source for this market will be official information from Anthropic; however, a consensus of credible reporting will also be used.

Outcome proposed: Yes

No dispute

Final outcome: Yes

On June 9, 2026, Anthropic released the Mythos-class model Claude Fable 5. This market will resolve to "Yes" if Anthropic releases the next Mythos-class model and makes it available to the general public by the listed date (ET). Otherwise, this market will resolve to "No." Any model whose official name includes “Mythos,” or that Anthropic officially describes as a “Mythos-class” model or similar, will qualify for this market’s resolution. For this market to resolve to "Yes," the qualifying model (as defined above) must be launched and publicly accessible, including via open beta or open rolling waitlist signups. A closed beta or any form of private access will not suffice. The release must be clearly defined and publicly announced by Anthropic as being accessible to the general public. If a qualifying model is made publicly accessible and labeled with the relevant version name within the company’s official website, this will qualify as “publicly announced”. Labeling errors, placeholder text, or version names displayed on the website that do not correspond to a model that is actually accessible to the general public under the rules will not qualify. The primary resolution source for this market will be official information from Anthropic; however, a consensus of credible reporting will also be used.Anthropic’s September 1 announcement of Claude Mythos 5.1, an incremental update to the Mythos-class large language model with targeted gains in cybersecurity and biology benchmarks, is the dominant factor shaping trader consensus on the next release. This follows the June 2026 launch of Claude Mythos 5 (restricted via Project Glasswing) and the more widely available Fable 5 variant, which established the current capability baseline after earlier preview access. Regulatory approvals that restored limited U.S. partner access in July, combined with Anthropic’s roughly 12-week frontier cadence and ongoing emphasis on safety guardrails, underpin strong implied probability for near-term resolution. Key swing factors include potential expansions of trusted-access programs, any redefinition of “general public” availability, or competitive pressure from other labs’ model updates.

On June 9, 2026, Anthropic released the Mythos-class model Claude Fable 5.

This market will resolve to "Yes" if Anthropic releases the next Mythos-class model and makes it available to the general public by the listed date (ET). Otherwise, this market will resolve to "No."

Any model whose official name includes “Mythos,” or that Anthropic officially describes as a “Mythos-class” model or similar, will qualify for this market’s resolution.

For this market to resolve to "Yes," the qualifying model (as defined above) must be launched and publicly accessible, including via open beta or open rolling waitlist signups. A closed beta or any form of private access will not suffice. The release must be clearly defined and publicly announced by Anthropic as being accessible to the general public.

If a qualifying model is made publicly accessible and labeled with the relevant version name within the company’s official website, this will qualify as “publicly announced”. Labeling errors, placeholder text, or version names displayed on the website that do not correspond to a model that is actually accessible to the general public under the rules will not qualify.

The primary resolution source for this market will be official information from Anthropic; however, a consensus of credible reporting will also be used.
Volume
$1,610,904
End Date
Sep 30, 2026
Market Opened
Aug 28, 2026, 4:18 AM ET
On June 9, 2026, Anthropic released the Mythos-class model Claude Fable 5. This market will resolve to "Yes" if Anthropic releases the next Mythos-class model and makes it available to the general public by the listed date (ET). Otherwise, this market will resolve to "No." Any model whose official name includes “Mythos,” or that Anthropic officially describes as a “Mythos-class” model or similar, will qualify for this market’s resolution. For this market to resolve to "Yes," the qualifying model (as defined above) must be launched and publicly accessible, including via open beta or open rolling waitlist signups. A closed beta or any form of private access will not suffice. The release must be clearly defined and publicly announced by Anthropic as being accessible to the general public. If a qualifying model is made publicly accessible and labeled with the relevant version name within the company’s official website, this will qualify as “publicly announced”. Labeling errors, placeholder text, or version names displayed on the website that do not correspond to a model that is actually accessible to the general public under the rules will not qualify. The primary resolution source for this market will be official information from Anthropic; however, a consensus of credible reporting will also be used.

Outcome proposed: Yes

No dispute

Final outcome: Yes

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Frequently Asked Questions

"Next Mythos-Class Model released by…?" is a prediction market on Polymarket with 11 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "September 1" at 100%, followed by "September 2" at 100%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 100¢ implies that the market collectively assigns a 100% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

As of today, "Next Mythos-Class Model released by…?" has generated $1.6 million in total trading volume since the market launched on Jun 10, 2026. This level of trading activity reflects strong engagement from the Polymarket community and helps ensure that the current odds are informed by a deep pool of market participants. You can track live price movements and trade on any outcome directly on this page.

To trade on "Next Mythos-Class Model released by…?," browse the 11 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "Next Mythos-Class Model released by…?" is "September 1" at 100%, meaning the market assigns a 100% chance to that outcome. The next closest outcome is "September 2" at 100%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "Next Mythos-Class Model released by…?" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.