Best AI Model on June 13: Claude Opus 4 Leads at 89%

Anthropic’s Claude Opus 4 (thinking variant) has effectively locked up this market. Traders are pricing an 89% probability that claude-opus-4-6-thinking holds the top spot on June 13, a number that reflects a dramatic shift from what was a wide-open contest just days ago. The contract moved from 41 cents to 89 cents in roughly 48 hours, driven by a surge on June 6 that pushed claude-opus-4-6-thinking to dominant positioning.

The market question asks which AI model ranks best on June 13, 2026. The YES contract for claude-opus-4-6-thinking trades at $0.89 (89% implied probability). The NO contract sits at $0.11. The market resolves June 13, 2026. Total volume is $1,160, with all of that volume recorded in the last 24 hours, against $5,262 in liquidity and zero open interest.

How the Claude Opus Four Thinking Contract Works

This contract resolves YES if claude-opus-4-6-thinking holds the designation of best AI model as of June 13, 2026. Resolution follows the market’s stated source criteria. The competing outcomes include claude-opus-4-6 (without the thinking mode), claude-opus-4-7-thinking, gemini-3.1-pro-preview, gemini-3.5-flash, and a catch-all Other category.

• claude-opus-4-6-thinking YES contract: $0.89 (89% probability)
• claude-opus-4-6-thinking NO contract: $0.11 (11% probability)

A NO payout requires a competing model, whether Google’s Gemini variants, Anthropic’s own non-thinking claude-opus-4-6, or a surprise entrant under Other, to overtake claude-opus-4-6-thinking before the June 13 close. Given the one-week window, that scenario depends on a major benchmark release or credible third-party evaluation that reshuffles the current standings.

Market Signals: Volume Spike and a Flat Hour

Momentum here reads as a sharp burst followed by consolidation. The 1-hour change is flat at 0.0%, the 24-hour figure is unavailable, and the trend score sits at 30, which is low. That combination says the big move already happened. The June 6 surge that pushed claude-opus-4-6-thinking from roughly 41 cents to 89 cents appears tied to benchmark or leaderboard data confirming the model’s position, likely a Chatbot Arena or LMSYS update reflecting new evaluation scores for the thinking variant.

Volume tells a different story than price. The entire $1,160 in total volume came in during the last 24 hours. That is a thin book. $5,262 in liquidity provides some cushion, but this is a low-conviction market by dollar terms, even if the directional signal is clear. Treat the 89% figure as a directional read, not a deeply liquid consensus.

• claude-opus-4-6-thinking holds the leading position on major public AI leaderboards as of this writing, with the thinking mode outperforming the base model on reasoning-heavy benchmarks.
• Google’s gemini-3.1-pro-preview and gemini-3.5-flash remain active competitors but have not displaced Anthropic’s top model in current evaluations.
• The 1-hour flat reading and low trend score of 30 confirm the market has digested the June 6 catalyst and is not adding new conviction in either direction.
• All volume entering in the last 24 hours signals this contract was largely ignored until a specific data event triggered rapid repricing.
• The June 13 close gives Google and OpenAI roughly one week to publish new benchmark data that could shift the leaderboard.

Lines Analysis: Anthropic Holds the Lead, But the Window Is Open

Anthropic’s thinking-mode variant of Claude Opus 4 is currently the model to beat. The jump from 41 cents to 89 cents over two days reflects a specific data signal, most likely a leaderboard update or independent evaluation dropping results that placed claude-opus-4-6-thinking clearly ahead of its nearest competitors. Anthropic has built the thinking variant to excel on multi-step reasoning tasks, and that positioning shows up in the contract price.

The risk sitting at 11% is real even if it is small. Google has a history of releasing benchmark-level updates on short timelines, and gemini-3.5-flash in particular has shown strong performance on speed-adjusted evaluations. A Google I/O follow-up, a surprise Gemini update, or a widely-shared third-party evaluation could push the market back toward 75 to 80 cents for claude-opus-4-6-thinking before June 13. The thinking variant’s lead is real but not guaranteed.

• Anthropic leaderboard standing: any confirmation of claude-opus-4-6-thinking maintaining top Chatbot Arena Elo through June 12 pushes the contract toward 95 cents.
• Google Gemini update: a gemini-3.1-pro-preview or flash model refresh with new benchmark scores would pressure the YES price and push NO above 15 cents.
• OpenAI wildcard: a surprise GPT-5 variant or o3 update entering leaderboards before June 13 would activate the Other outcome and collapse the YES probability quickly.
• Thin liquidity: the $1,160 volume base means a single large trade could move this price meaningfully in either direction.
• Resolution clarity: ambiguity in how the market defines best, whether by Elo, benchmark average, or another metric, creates tail risk regardless of which model performs best empirically.

The $1,160 total volume puts this market in low confidence territory by dollar size. The directional signal favors claude-opus-4-6-thinking, and the current leaderboard data supports it. But thin markets can move fast on small information, and the one-week window before June 13 is long enough for a meaningful competitor update.

LINES VERDICT

Claude Opus Four Thinking Holds

Anthropic’s thinking-mode variant has earned its 89% market price through verifiable leaderboard performance, and no competitor has released data in the last week that threatens that standing. The risk is real but narrow.

What the market says: 89% probability as of June 6, 2026, reflecting a rapid reprice from 41 cents. With seven days to the June 13 resolution, this market is directionally clear but thin enough that a single competitor update or benchmark release could move the needle fast.

Industry Context: Why This Window Matters

The AI model leaderboard is one of the most actively contested rankings in tech right now. Anthropic, Google, and OpenAI each have the resources and motivation to publish or promote favorable benchmark results on short notice. The thinking-mode framing matters here because claude-opus-4-6-thinking competes on a different evaluation axis than base models, specifically on multi-step reasoning and extended context tasks where the additional compute investment pays off in measurable score improvements.

The related market data adds context. The market asking which company has the best AI model at end of June sits at 83%, broadly aligned with this contract’s 89% for Anthropic’s specific model variant. The Claude 5 released by contract at 69% suggests traders expect Anthropic to maintain momentum into the summer. These correlated markets reinforce the directional bet on Anthropic in the near term, though they do not change the thin-liquidity caution on this specific contract.

Before June 13, watch for any LMSYS Chatbot Arena update, any Google DeepMind benchmark release, or any OpenAI product announcement. Each of those events carries enough weight to reprice this market within hours.

Best AI model on June 13?

claude-opus-4-6-thinking

claude-opus-4-6

claude-opus-4-7-thinking

gemini-3.1-pro-preview

gemini-3.5-flash

Other

Which events would move this market before June 13?

What does 89% probability actually mean here?

It means traders who have put money into this contract collectively believe claude-opus-4-6-thinking has roughly a nine-in-ten chance of holding the best-model designation on June 13. It is not a guarantee.

What does the NO contract pay out on?

Any competing model, including claude-opus-4-6, claude-opus-4-7-thinking, gemini-3.1-pro-preview, gemini-3.5-flash, or an Other entrant, taking the top spot before or on June 13 resolves the NO position in the money.

What moves this contract price?

Leaderboard updates on LMSYS Chatbot Arena, new benchmark releases from Google or OpenAI, or any independent evaluation ranking a competing model above claude-opus-4-6-thinking would immediately reprice this contract.

When and how does this market resolve?

The market resolves June 13, 2026, according to the resolution source criteria stated in the market. The definition of best model determines the outcome, and any ambiguity in that definition is a risk factor.

Is the volume here reliable?

The $1,160 total volume and $5,262 liquidity are thin by prediction market standards. The 89% price is directionally meaningful but can shift on small trades. Treat it as a signal, not a deep consensus.