BinaryStreaks

Will OpenAI have the best AI model at the end of April 2026?

How to read the numbers

Implied / market-implied YES

The probability of YES implied by current traded prices (mid or last). It is what participants are paying for, not a claim about real-world odds.

Estimated fair value (EFV)

A rule-based heuristic from the signal engine when a rule sets one, not a black-box forecast. Some signals only describe liquidity or spreads and may show no EFV.

Edge / gap

The difference between EFV and market-implied, in percentage points (EFV minus market for YES). Filters may use “largest gap.” This is informational only—not trading advice or guaranteed advantage.

Stance (above / below / near estimate)

Compares market-implied to EFV when both exist. Labels are not buy or sell recommendations.

Severity

How strong the rule hit is on a 1–5 scale. It reflects rule strength, not statistical confidence that the outcome will occur.

Volume

Reported trading activity for the market, for context on size and liquidity.

Change & sparklines

Movement in market-implied YES over the window labeled on the card—often 24h where data allows.

Signals

Rule-based flags from ingested public data. They are not trade recommendations.

More detail in Methodology.

Market-implied 1.5%

—Volume ~501,094.427← All markets

Recent price

1.5%

This market will resolve according to the company that owns the model that has the highest arena score based on the Chatbot Arena LLM Leaderboard (https://lmarena.ai/) when the table under the "Leaderboard" tab is checked on April 30, 2026, 12:00 PM ET. Results from the "Score" column under the "Text Arena | Overall" Leaderboard tab at https://lmarena.ai/leaderboard/text with style control off will be used to resolve this market. Models will be ranked primarily by their arena score at this market’s check time, with alphabetical order of company names as listed in this market group used as a tiebreaker (e.g., if the two models are tied by arena score, “Google” would be ranked ahead of “xAI”). This market will resolve based on the company that occupies first place under this ranking. The resolution source for this market is the Chatbot Arena LLM Leaderboard found at https://lmarena.ai/. If this resolution source is unavailable at check time, this market will remain open until the leaderboard comes back online and will resolve based on the first check after it becomes available. If it becomes permanently unavailable, this market will resolve based on another resolution source.

Active signals

No active signals for this market.