SimpleFunctions
9 source contracts·Kalshi 6 + Polymarket 3·refreshed just now·Closes Jan 1, 2027 · 207d

When will GPT-5 be released?

Liquidity-weighted aggregate sits at 45% across 9 contracts. Kalshi at 32%, Polymarket at 72% — a 40pp cross-venue gap.

Implied probability

45%
0%50%100%

Kalshi

32%

6 contracts

Polymarket

72%

3 contracts

Cross-venue gap

40pp

wide divergence

24h move

no pin

24h volume

$9K

9 contracts

Closes

Jan 1, 2027

207 days

30-day trend

0%50%100%-30d-3w-2w-1wtodayAggregate: 72% (31 days, 31 points)Aggregate: 72% on 2026-06-08
Aggregate of 9 contracts · 31d

Cross-venue edge

Kalshi 32¢ · Polymarket 72¢ · 40pp spread

Buy on Kalshi (32¢, 6 contracts) and sell on Polymarket (72¢) — assuming both contracts settle on the same outcome.

Bracket families

3 clusters across 9 contracts.

These contracts were grouped by title similarity. The headline aggregate combines all clusters; verify the cluster you actually need before quoting a number.

Heads-up — heterogeneous clusters

The top two clusters share only 0% of their title tokens — “Will OpenAI” vs “GPT-5.6 released by”. The headline aggregate weights both, so the number on this page is meaningful only if the clusters resolve to the same question.

What moved the line

  • Jun 3December 31, 202613pp2235¢ · Polymarket
  • Jun 5December 31, 202612pp2840¢ · Polymarket
  • Jun 4December 31, 20267pp3528¢ · Polymarket
  • Jun 2June 305pp8691¢ · Polymarket
  • Jun 4June 305pp9085¢ · Polymarket

Recently closed in technology

These markets stopped trading. Last odds and any captured outcome are shown above — full settlement detail lives at the venue.

More like this

Adjacent prediction questions.

How we compute these odds

SimpleFunctions aggregates live prediction-market contracts from Kalshi and Polymarket. Each slug groups contracts that resolve on the same underlying event, identified by venue event_id.

For binary slugs, the headline probability is the liquidity-weighted mid-price across all bound contracts. For multi-outcome slugs (e.g. elections with 3+ candidates), the headline is the leader’s price; we never arithmetically average disjoint outcomes — that would produce a number with no real-world meaning.

Snapshots refresh every 5 minutes during market hours; daily aggregates are computed at 04:00 UTC. The 30-day sparkline is drawn from per-ticker daily means stored in market_indicator_daily; 24h delta and movement events are derived from the same source.

Last updated on this page: just now.