Anthropic released Claude Sonnet 5 on June 30, 2026, as its most agentic Sonnet-class model to date, with strong benchmarks in tool use, coding, reasoning, and autonomous task completion that approach Opus 4.8 performance at lower cost. The model became the default across Free and Pro plans immediately upon launch and rolled out to API users with introductory pricing through August. This timing and focus on agentic workflows align directly with Text Arena’s text-based game environments and TrueSkill evaluations, where recent Claude variants have competed. Traders are watching for rapid leaderboard submission, as Anthropic has prioritized quick deployment of capable models in competitive benchmarks amid rivalry with OpenAI’s GPT family and Google’s offerings. No major delays or safety holds have been reported.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$24,971 Vol.
Dec 31, 2026
1470+
No
1480+
No
1490+
No
1500+
No
$24,971 Vol.
1470+
$10,076 Vol.
No
1480+
$6,784 Vol.
No
1490+
$2,632 Vol.
No
1500+
$5,479 Vol.
No
This market will resolve to "Yes" if the next Claude Sonnet 5 model added to the Arena.AI Leaderboard (https://arena.ai/leaderboard/text/overall-no-style-control) has at least the specified score at 12:00 PM ET on the calendar date following the date on which it first appears on the leaderboard. Otherwise, this market will resolve to "No".
Any Claude model newly added to the leaderboard and labeled as "Sonnet 5" may qualify (e.g., claude-sonnet-5, claude-sonnet-5.0-thinking, claude-sonnet-5.1-preview, or similar). Claude models labeled only as Opus, Haiku, or another non-Sonnet 5 variant will not qualify.
Results from the "Score" column under the "Text Arena | Overall" Leaderboard tab at https://arena.ai/leaderboard/text/overall-no-style-control with style control off will be used to resolve this market. This market will resolve solely based on the specified score in the Score column of the leaderboard, regardless of any underlying granular or unrounded data presented elsewhere.
If multiple models are added to the leaderboard on the same calendar date (ET), the highest-scoring model will be used for resolution. Models added to the leaderboard on the calendar date following the initial qualifying model’s first appearance will not be considered.
A qualifying model must be newly added to the Arena.AI Leaderboard. Whether the model was previously released, publicly accessible, in beta, or otherwise available before appearing on the leaderboard is irrelevant for this market.
The resolution source for this market is the Chatbot Arena LLM Leaderboard found at arena.ai/leaderboard/text. If this resolution source is unavailable at 12:00 PM ET on the calendar date following the date on which the qualifying model first appears on the leaderboard, this market will resolve based on the first subsequent instance at which such a score becomes available on the leaderboard. If it remains unavailable through the end of the seventh day after the qualifying model first appears on the leaderboard or if no qualifying model release occurs by December 31, 2026, 11:59 PM ET, this market will resolve to "No".Anthropic released Claude Sonnet 5 on June 30, 2026, as its most agentic Sonnet-class model to date, with strong benchmarks in tool use, coding, reasoning, and autonomous task completion that approach Opus 4.8 performance at lower cost. The model became the default across Free and Pro plans immediately upon launch and rolled out to API users with introductory pricing through August. This timing and focus on agentic workflows align directly with Text Arena’s text-based game environments and TrueSkill evaluations, where recent Claude variants have competed. Traders are watching for rapid leaderboard submission, as Anthropic has prioritized quick deployment of capable models in competitive benchmarks amid rivalry with OpenAI’s GPT family and Google’s offerings. No major delays or safety holds have been reported.
This market will resolve to "Yes" if the next Claude Sonnet 5 model added to the Arena.AI Leaderboard (https://arena.ai/leaderboard/text/overall-no-style-control) has at least the specified score at 12:00 PM ET on the calendar date following the date on which it first appears on the leaderboard. Otherwise, this market will resolve to "No".
Any Claude model newly added to the leaderboard and labeled as "Sonnet 5" may qualify (e.g., claude-sonnet-5, claude-sonnet-5.0-thinking, claude-sonnet-5.1-preview, or similar). Claude models labeled only as Opus, Haiku, or another non-Sonnet 5 variant will not qualify.
Results from the "Score" column under the "Text Arena | Overall" Leaderboard tab at https://arena.ai/leaderboard/text/overall-no-style-control with style control off will be used to resolve this market. This market will resolve solely based on the specified score in the Score column of the leaderboard, regardless of any underlying granular or unrounded data presented elsewhere.
If multiple models are added to the leaderboard on the same calendar date (ET), the highest-scoring model will be used for resolution. Models added to the leaderboard on the calendar date following the initial qualifying model’s first appearance will not be considered.
A qualifying model must be newly added to the Arena.AI Leaderboard. Whether the model was previously released, publicly accessible, in beta, or otherwise available before appearing on the leaderboard is irrelevant for this market.
The resolution source for this market is the Chatbot Arena LLM Leaderboard found at arena.ai/leaderboard/text. If this resolution source is unavailable at 12:00 PM ET on the calendar date following the date on which the qualifying model first appears on the leaderboard, this market will resolve based on the first subsequent instance at which such a score becomes available on the leaderboard. If it remains unavailable through the end of the seventh day after the qualifying model first appears on the leaderboard or if no qualifying model release occurs by December 31, 2026, 11:59 PM ET, this market will resolve to "No".
Any Claude model newly added to the leaderboard and labeled as "Sonnet 5" may qualify (e.g., claude-sonnet-5, claude-sonnet-5.0-thinking, claude-sonnet-5.1-preview, or similar). Claude models labeled only as Opus, Haiku, or another non-Sonnet 5 variant will not qualify.
Results from the "Score" column under the "Text Arena | Overall" Leaderboard tab at https://arena.ai/leaderboard/text/overall-no-style-control with style control off will be used to resolve this market. This market will resolve solely based on the specified score in the Score column of the leaderboard, regardless of any underlying granular or unrounded data presented elsewhere.
If multiple models are added to the leaderboard on the same calendar date (ET), the highest-scoring model will be used for resolution. Models added to the leaderboard on the calendar date following the initial qualifying model’s first appearance will not be considered.
A qualifying model must be newly added to the Arena.AI Leaderboard. Whether the model was previously released, publicly accessible, in beta, or otherwise available before appearing on the leaderboard is irrelevant for this market.
The resolution source for this market is the Chatbot Arena LLM Leaderboard found at arena.ai/leaderboard/text. If this resolution source is unavailable at 12:00 PM ET on the calendar date following the date on which the qualifying model first appears on the leaderboard, this market will resolve based on the first subsequent instance at which such a score becomes available on the leaderboard. If it remains unavailable through the end of the seventh day after the qualifying model first appears on the leaderboard or if no qualifying model release occurs by December 31, 2026, 11:59 PM ET, this market will resolve to "No".
Market Opened: Jun 30, 2026, 4:10 PM ET
Volume
$24,971End Date
Dec 31, 2026Market Opened
Jun 30, 2026, 4:10 PM ETResolver
0x65070BE91...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to "Yes" if the next Claude Sonnet 5 model added to the Arena.AI Leaderboard (https://arena.ai/leaderboard/text/overall-no-style-control) has at least the specified score at 12:00 PM ET on the calendar date following the date on which it first appears on the leaderboard. Otherwise, this market will resolve to "No".
Any Claude model newly added to the leaderboard and labeled as "Sonnet 5" may qualify (e.g., claude-sonnet-5, claude-sonnet-5.0-thinking, claude-sonnet-5.1-preview, or similar). Claude models labeled only as Opus, Haiku, or another non-Sonnet 5 variant will not qualify.
Results from the "Score" column under the "Text Arena | Overall" Leaderboard tab at https://arena.ai/leaderboard/text/overall-no-style-control with style control off will be used to resolve this market. This market will resolve solely based on the specified score in the Score column of the leaderboard, regardless of any underlying granular or unrounded data presented elsewhere.
If multiple models are added to the leaderboard on the same calendar date (ET), the highest-scoring model will be used for resolution. Models added to the leaderboard on the calendar date following the initial qualifying model’s first appearance will not be considered.
A qualifying model must be newly added to the Arena.AI Leaderboard. Whether the model was previously released, publicly accessible, in beta, or otherwise available before appearing on the leaderboard is irrelevant for this market.
The resolution source for this market is the Chatbot Arena LLM Leaderboard found at arena.ai/leaderboard/text. If this resolution source is unavailable at 12:00 PM ET on the calendar date following the date on which the qualifying model first appears on the leaderboard, this market will resolve based on the first subsequent instance at which such a score becomes available on the leaderboard. If it remains unavailable through the end of the seventh day after the qualifying model first appears on the leaderboard or if no qualifying model release occurs by December 31, 2026, 11:59 PM ET, this market will resolve to "No".Anthropic released Claude Sonnet 5 on June 30, 2026, as its most agentic Sonnet-class model to date, with strong benchmarks in tool use, coding, reasoning, and autonomous task completion that approach Opus 4.8 performance at lower cost. The model became the default across Free and Pro plans immediately upon launch and rolled out to API users with introductory pricing through August. This timing and focus on agentic workflows align directly with Text Arena’s text-based game environments and TrueSkill evaluations, where recent Claude variants have competed. Traders are watching for rapid leaderboard submission, as Anthropic has prioritized quick deployment of capable models in competitive benchmarks amid rivalry with OpenAI’s GPT family and Google’s offerings. No major delays or safety holds have been reported.
This market will resolve to "Yes" if the next Claude Sonnet 5 model added to the Arena.AI Leaderboard (https://arena.ai/leaderboard/text/overall-no-style-control) has at least the specified score at 12:00 PM ET on the calendar date following the date on which it first appears on the leaderboard. Otherwise, this market will resolve to "No".
Any Claude model newly added to the leaderboard and labeled as "Sonnet 5" may qualify (e.g., claude-sonnet-5, claude-sonnet-5.0-thinking, claude-sonnet-5.1-preview, or similar). Claude models labeled only as Opus, Haiku, or another non-Sonnet 5 variant will not qualify.
Results from the "Score" column under the "Text Arena | Overall" Leaderboard tab at https://arena.ai/leaderboard/text/overall-no-style-control with style control off will be used to resolve this market. This market will resolve solely based on the specified score in the Score column of the leaderboard, regardless of any underlying granular or unrounded data presented elsewhere.
If multiple models are added to the leaderboard on the same calendar date (ET), the highest-scoring model will be used for resolution. Models added to the leaderboard on the calendar date following the initial qualifying model’s first appearance will not be considered.
A qualifying model must be newly added to the Arena.AI Leaderboard. Whether the model was previously released, publicly accessible, in beta, or otherwise available before appearing on the leaderboard is irrelevant for this market.
The resolution source for this market is the Chatbot Arena LLM Leaderboard found at arena.ai/leaderboard/text. If this resolution source is unavailable at 12:00 PM ET on the calendar date following the date on which the qualifying model first appears on the leaderboard, this market will resolve based on the first subsequent instance at which such a score becomes available on the leaderboard. If it remains unavailable through the end of the seventh day after the qualifying model first appears on the leaderboard or if no qualifying model release occurs by December 31, 2026, 11:59 PM ET, this market will resolve to "No".
Any Claude model newly added to the leaderboard and labeled as "Sonnet 5" may qualify (e.g., claude-sonnet-5, claude-sonnet-5.0-thinking, claude-sonnet-5.1-preview, or similar). Claude models labeled only as Opus, Haiku, or another non-Sonnet 5 variant will not qualify.
Results from the "Score" column under the "Text Arena | Overall" Leaderboard tab at https://arena.ai/leaderboard/text/overall-no-style-control with style control off will be used to resolve this market. This market will resolve solely based on the specified score in the Score column of the leaderboard, regardless of any underlying granular or unrounded data presented elsewhere.
If multiple models are added to the leaderboard on the same calendar date (ET), the highest-scoring model will be used for resolution. Models added to the leaderboard on the calendar date following the initial qualifying model’s first appearance will not be considered.
A qualifying model must be newly added to the Arena.AI Leaderboard. Whether the model was previously released, publicly accessible, in beta, or otherwise available before appearing on the leaderboard is irrelevant for this market.
The resolution source for this market is the Chatbot Arena LLM Leaderboard found at arena.ai/leaderboard/text. If this resolution source is unavailable at 12:00 PM ET on the calendar date following the date on which the qualifying model first appears on the leaderboard, this market will resolve based on the first subsequent instance at which such a score becomes available on the leaderboard. If it remains unavailable through the end of the seventh day after the qualifying model first appears on the leaderboard or if no qualifying model release occurs by December 31, 2026, 11:59 PM ET, this market will resolve to "No".
Volume
$24,971End Date
Dec 31, 2026Market Opened
Jun 30, 2026, 4:10 PM ETResolver
0x65070BE91...Outcome proposed: No
No dispute
Final outcome: No
Anthropic released Claude Sonnet 5 on June 30, 2026, as its most agentic Sonnet-class model to date, with strong benchmarks in tool use, coding, reasoning, and autonomous task completion that approach Opus 4.8 performance at lower cost. The model became the default across Free and Pro plans immediately upon launch and rolled out to API users with introductory pricing through August. This timing and focus on agentic workflows align directly with Text Arena’s text-based game environments and TrueSkill evaluations, where recent Claude variants have competed. Traders are watching for rapid leaderboard submission, as Anthropic has prioritized quick deployment of capable models in competitive benchmarks amid rivalry with OpenAI’s GPT family and Google’s offerings. No major delays or safety holds have been reported.
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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Frequently Asked Questions