Science and Technology Polymarket July 27, 2026 Crowd ahead of press
Anthropic's Claude Opus 5 arrives with cost-capability toggle
Next Claude Opus: Text Arena Debut?
Polymarket prices this 1470+ at 100%. The market is more confident than the current reporting.
Anthropic has unveiled Claude Opus 5, headlined by a toggle that lets users trade cost for capability — a feature Fortune reports positions the new frontier model as both a premium and budget-conscious offering. Decrypt notes the new everyday model undercuts Anthropic's own frontier product on cost while beating it almost everywhere that counts. The specific question at issue is whether the next Opus-class model to appear on the Arena.AI text leaderboard posts a score of 1470 or higher the day after its debut. Traders put that prospect at 100%, a notably bullish read that has shifted +23.5 pts over the past week.
Background
The Arena.AI leaderboard ranks large language models on head-to-head human preference votes across text tasks, and a score of 1470+ sits near the very top of the current field. Anthropic's Opus line — Claude's most capable tier, above Sonnet and Haiku — has been the company's flagship for complex reasoning. The market resolves December 31, 2026, giving roughly five months for a qualifying model to appear. Separately, Moonshot AI's Kimi K3, a 2.8-trillion-parameter Chinese model, recently topped the Frontend Code Arena, intensifying the U.S.-China competition that frames Opus 5's arrival.
The precedent
- OpenAI's GPT-4o and Anthropic's Claude 3.5 Sonnet have traded the top spot on the LMSYS Chatbot Arena (now Arena.AI) multiple times since mid-2024, with scores clustering in the 1270–1320 range through late 2024 before climbing.
Context compiled by Crowdtells from the public record — verify before relying on it.
What the coverage agrees on
- Anthropic has released Claude Opus 5 as its newest frontier model
- The model includes a toggle between cost and capability levels
- Chinese AI models are increasingly competitive on global benchmarks
How outlets frame it
- Decrypt: Frames the new everyday model as undercutting Anthropic's own frontier product on cost while beating it almost everywhere that counts — a notably aggressive claim about internal cannibalization that other outlets do not echo.
What to watch
The next milestone is the first appearance of an Opus-labeled model on the Arena.AI text leaderboard; the day after it shows up, its score must read 1470 or higher at noon ET for the proposition to resolve Yes. Watch whether Anthropic ships a distinct Opus variant beyond the initial Opus 5 release, and whether Kimi K3's momentum pushes rival scores upward across the board.
The numbers behind this
Polymarket prices this 1470+ at 100%.
24h +0.5 pts 7d +23.5 pts
$226K traded · $89.2K in the last day · $130K resting liquidity · $98.8K open interest
Resolves on: This market will resolve to "Yes" if the next Claude Opus 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 "Opus" may qualify (e.g., claude-Opus-4.9, claude-Opus-5.0-thinking, claude-Opus-5.1-preview, or similar). Claude models labeled only as Sonnet, Haiku, or another non-Opus variant will not qualify. Results from the "Score" column under the "Text Arena | Overall" Leaderboard tab at…
Pricing Polymarket 100%
Sources
- Anthropic debuts Claude Opus 5 with feature that lets users toggle between cost and capability fortune.com
- Kimi K3 tops Frontend Code Arena in a first for Chinese AI models notebookcheck.net
- Moonshot AI's 2.8-Trillion-Parameter Kimi K3 Triggers Global Tech Rout, Reigniting US-China AI Race finance.biggo.com
Frequently asked questions
Next Claude Opus: Text Arena Debut?
Polymarket prices this 1470+ at 100%. The market is more confident than the current reporting.
What do the sources agree on?
Anthropic has released Claude Opus 5 as its newest frontier model The model includes a toggle between cost and capability levels Chinese AI models are increasingly competitive on global benchmarks
When does this market resolve?
This market resolves on: This market will resolve to "Yes" if the next Claude Opus 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 "Opus" may qualify (e.g., claude-Opus-4.9, claude-Opus-5.0-thinking, claude-Opus-5.1-preview, or similar). Claude models labeled only as Sonnet, Haiku, or another non-Opus variant will not qualify. Results from the "Score" column under the "Text Arena | Overall" Leaderboard tab at…
How are these odds set?
Prediction-market odds are prices set by people trading real money on the outcome, so the price reads as the crowd’s implied probability — not a guarantee or financial advice.
AI-written briefing grounded in 3 sources and the live market, edited by Samuel Jo. Odds are crowd probabilities, not advice — how this works.