Anthropic’s next Mythos-class model faces a fragmented release window because the lab continues to prioritize additional safety classifiers and U.S. government approvals after the June 9 launch of Claude Mythos 5 and the safer Fable 5 variant. Recent limited expansions, including August integration of Mythos 5 into Claude Security tools for partner code scanning, signal accelerating internal readiness without full public clearance. Traders weigh this against competitive pressure from OpenAI’s restricted GPT-5.6 cybersecurity models and Chinese labs nearing similar agentic and cyber capabilities, which could force faster timelines. The near-even odds on early-to-mid September dates reflect uncertainty over final validation milestones rather than doubt about an imminent release, with historical three-to-five-month cadence from prior frontier launches providing the main anchor.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedSeptember 22 70%
September 7 51%
September 8 47%
September 9 47%
$10,644 Vol.
$10,644 Vol.
August 29
7%
August 30
<1%
August 31
15%
September 1
20%
September 2
25%
September 3
5%
September 4
20%
September 5
1%
September 6
-
September 7
51%
September 8
47%
September 9
47%
September 10
35%
September 11
24%
September 12
1%
September 13
4%
September 14
21%
September 15
45%
September 16
4%
September 17
3%
September 18
17%
September 19
4%
September 20
3%
September 21
8%
September 22
70%
September 23
13%
September 24
22%
September 25
20%
September 26
46%
September 27
4%
September 28
4%
September 29
12%
September 30
4%
No release by September 30
8%
September 22 70%
September 7 51%
September 8 47%
September 9 47%
$10,644 Vol.
$10,644 Vol.
August 29
7%
August 30
<1%
August 31
15%
September 1
20%
September 2
25%
September 3
5%
September 4
20%
September 5
1%
September 6
-
September 7
51%
September 8
47%
September 9
47%
September 10
35%
September 11
24%
September 12
1%
September 13
4%
September 14
21%
September 15
45%
September 16
4%
September 17
3%
September 18
17%
September 19
4%
September 20
3%
September 21
8%
September 22
70%
September 23
13%
September 24
22%
September 25
20%
September 26
46%
September 27
4%
September 28
4%
September 29
12%
September 30
4%
No release by September 30
8%
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.
A qualifying model 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 either be clearly defined and publicly announced by Anthropic as accessible to the general public, or otherwise be made publicly accessible and explicitly labeled on the company's official website. 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 will not qualify.
The primary resolution source for this market will be official information from Anthropic, with additional verification from a consensus of credible reporting.
Market Opened: Aug 24, 2026, 7:14 PM ET
Resolver
0x69c47De9D...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.
A qualifying model 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 either be clearly defined and publicly announced by Anthropic as accessible to the general public, or otherwise be made publicly accessible and explicitly labeled on the company's official website. 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 will not qualify.
The primary resolution source for this market will be official information from Anthropic, with additional verification from a consensus of credible reporting.
Resolver
0x69c47De9D...Anthropic’s next Mythos-class model faces a fragmented release window because the lab continues to prioritize additional safety classifiers and U.S. government approvals after the June 9 launch of Claude Mythos 5 and the safer Fable 5 variant. Recent limited expansions, including August integration of Mythos 5 into Claude Security tools for partner code scanning, signal accelerating internal readiness without full public clearance. Traders weigh this against competitive pressure from OpenAI’s restricted GPT-5.6 cybersecurity models and Chinese labs nearing similar agentic and cyber capabilities, which could force faster timelines. The near-even odds on early-to-mid September dates reflect uncertainty over final validation milestones rather than doubt about an imminent release, with historical three-to-five-month cadence from prior frontier launches providing the main anchor.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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