Anthropic’s June 30 release of Claude Sonnet 5, positioned as its most agentic mid-tier model with improved tool use, autonomous browser and terminal operation, and coding benchmarks approaching Opus 4.8 at lower cost, has set expectations for the next Sonnet iteration. Prediction markets currently imply a mid-October 2026 release window, reflecting Anthropic’s recent cadence of major updates every three to four months amid competition in large language model agentic performance. Recent September launches of Fable 5.1 and Mythos 5.1 underscore ongoing development momentum, while traders monitor API availability, pricing tiers, and capability demonstrations that typically precede new Sonnet versions. No official timeline has been announced, leaving room for shifts based on internal progress or competitive responses.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$15,383 Vol.
Sep 30, 2026
September 30
22%
October 31
90%
December 31
97%
$15,383 Vol.
September 30
$935 Vol.
22%
October 31
$6,953 Vol.
90%
December 31
$3,757 Vol.
97%
This market will resolve to "Yes" if Anthropic's next Claude Sonnet model is made available to the general public by the specified date (ET). Otherwise, this market will resolve to "No."
Claude Sonnet refers to a model by Anthropic explicitly named Sonnet. Qualifying models include Claude Sonnet 5.1, Claude Sonnet 5.5, Sonnet 6, or any other Sonnet variants. Models under any other name, such as Opus, Haiku, Fable, or Mythos, will not qualify, unless the model is explicitly and officially named Sonnet by Anthropic.
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 be either clearly defined and publicly announced by Anthropic as being accessible to the general public or otherwise made publicly accessible and explicitly labeled within 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.Anthropic’s June 30 release of Claude Sonnet 5, positioned as its most agentic mid-tier model with improved tool use, autonomous browser and terminal operation, and coding benchmarks approaching Opus 4.8 at lower cost, has set expectations for the next Sonnet iteration. Prediction markets currently imply a mid-October 2026 release window, reflecting Anthropic’s recent cadence of major updates every three to four months amid competition in large language model agentic performance. Recent September launches of Fable 5.1 and Mythos 5.1 underscore ongoing development momentum, while traders monitor API availability, pricing tiers, and capability demonstrations that typically precede new Sonnet versions. No official timeline has been announced, leaving room for shifts based on internal progress or competitive responses.
This market will resolve to "Yes" if Anthropic's next Claude Sonnet model is made available to the general public by the specified date (ET). Otherwise, this market will resolve to "No."
Claude Sonnet refers to a model by Anthropic explicitly named Sonnet. Qualifying models include Claude Sonnet 5.1, Claude Sonnet 5.5, Sonnet 6, or any other Sonnet variants. Models under any other name, such as Opus, Haiku, Fable, or Mythos, will not qualify, unless the model is explicitly and officially named Sonnet by Anthropic.
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 be either clearly defined and publicly announced by Anthropic as being accessible to the general public or otherwise made publicly accessible and explicitly labeled within 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.
Claude Sonnet refers to a model by Anthropic explicitly named Sonnet. Qualifying models include Claude Sonnet 5.1, Claude Sonnet 5.5, Sonnet 6, or any other Sonnet variants. Models under any other name, such as Opus, Haiku, Fable, or Mythos, will not qualify, unless the model is explicitly and officially named Sonnet by Anthropic.
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 be either clearly defined and publicly announced by Anthropic as being accessible to the general public or otherwise made publicly accessible and explicitly labeled within 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: Sep 3, 2026, 9:06 AM ET
Volume
$15,383End Date
Jan 1, 2027Market Opened
Sep 3, 2026, 9:06 AM ETResolver
0x65070BE91...This market will resolve to "Yes" if Anthropic's next Claude Sonnet model is made available to the general public by the specified date (ET). Otherwise, this market will resolve to "No."
Claude Sonnet refers to a model by Anthropic explicitly named Sonnet. Qualifying models include Claude Sonnet 5.1, Claude Sonnet 5.5, Sonnet 6, or any other Sonnet variants. Models under any other name, such as Opus, Haiku, Fable, or Mythos, will not qualify, unless the model is explicitly and officially named Sonnet by Anthropic.
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 be either clearly defined and publicly announced by Anthropic as being accessible to the general public or otherwise made publicly accessible and explicitly labeled within 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.Anthropic’s June 30 release of Claude Sonnet 5, positioned as its most agentic mid-tier model with improved tool use, autonomous browser and terminal operation, and coding benchmarks approaching Opus 4.8 at lower cost, has set expectations for the next Sonnet iteration. Prediction markets currently imply a mid-October 2026 release window, reflecting Anthropic’s recent cadence of major updates every three to four months amid competition in large language model agentic performance. Recent September launches of Fable 5.1 and Mythos 5.1 underscore ongoing development momentum, while traders monitor API availability, pricing tiers, and capability demonstrations that typically precede new Sonnet versions. No official timeline has been announced, leaving room for shifts based on internal progress or competitive responses.
This market will resolve to "Yes" if Anthropic's next Claude Sonnet model is made available to the general public by the specified date (ET). Otherwise, this market will resolve to "No."
Claude Sonnet refers to a model by Anthropic explicitly named Sonnet. Qualifying models include Claude Sonnet 5.1, Claude Sonnet 5.5, Sonnet 6, or any other Sonnet variants. Models under any other name, such as Opus, Haiku, Fable, or Mythos, will not qualify, unless the model is explicitly and officially named Sonnet by Anthropic.
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 be either clearly defined and publicly announced by Anthropic as being accessible to the general public or otherwise made publicly accessible and explicitly labeled within 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.
Claude Sonnet refers to a model by Anthropic explicitly named Sonnet. Qualifying models include Claude Sonnet 5.1, Claude Sonnet 5.5, Sonnet 6, or any other Sonnet variants. Models under any other name, such as Opus, Haiku, Fable, or Mythos, will not qualify, unless the model is explicitly and officially named Sonnet by Anthropic.
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 be either clearly defined and publicly announced by Anthropic as being accessible to the general public or otherwise made publicly accessible and explicitly labeled within 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.
Volume
$15,383End Date
Jan 1, 2027Market Opened
Sep 3, 2026, 9:06 AM ETResolver
0x65070BE91...Anthropic’s June 30 release of Claude Sonnet 5, positioned as its most agentic mid-tier model with improved tool use, autonomous browser and terminal operation, and coding benchmarks approaching Opus 4.8 at lower cost, has set expectations for the next Sonnet iteration. Prediction markets currently imply a mid-October 2026 release window, reflecting Anthropic’s recent cadence of major updates every three to four months amid competition in large language model agentic performance. Recent September launches of Fable 5.1 and Mythos 5.1 underscore ongoing development momentum, while traders monitor API availability, pricing tiers, and capability demonstrations that typically precede new Sonnet versions. No official timeline has been announced, leaving room for shifts based on internal progress or competitive responses.
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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