Will OpenAI’s Astra model be released by September 4, 2026?
Crossbook compares what two exchanges, Polymarket and Kalshi, charge for the same event, and publishes a permanent scored record of its own forecasts under published rules.
Tracked on one venue, with Crossbook's own call on the record.
Crossbook forecast
- 14.0%against a market price of 78.0% at the timeYES
Logged 2 Sept 2026, 12:42 UTC · Brier 0.7396
- Time decay dominates: with only ~2 days to resolution and no widely announced launch event or rollout date, a qualifying public release requires OpenAI to surprise-drop Astra essentially immediately, which is a low-base-rate event.
- The August 1 disclosure described Astra as an *internal* version; signal here is weak for imminent public availability, and OpenAI's history (GPT-4.5, GPT-5 rollouts) shows long gaps between internal existence and general availability, often under different branding.
- The 78% market-implied price appears driven by narrative anchoring on the disclosure itself rather than concrete launch evidence; the resolution criteria (public availability under the Astra name or confirmed-successor branding) are stricter than traders may be pricing, and naming/branding risk (e.g., collision with Google's 'Astra') adds further NO pressure.
- Divergence from market price is large (my ~14% vs 78%); a plausible cause is that thin volume ($12k) plus recency bias around the August announcement inflates YES, though I acknowledge I may be missing very recent launch news in the final 48 hours.
What would change it: A credible OpenAI announcement or scheduled event confirming Astra's public release on or before September 4, 2026 would push this to near-certain YES.
Settlement source
Context
Polymarket prices this at 97%. No verified equivalent is currently listed on the other venue, so there is no cross venue comparison on this page.
Volume over the last 24 hours is active, at about $36,103 on the busier venue.
This market has settled. The page is kept as a record of what the market said while the question was open, and of what Crossbook called.
Related markets
- New pandemic in 2026?
- Will Apple release a foldable iPhone by September 15?
- Will the US confirm that aliens exist before 2027?
- Next Mythos-Class Model released by August 31, 2026?
- Next Mythos-Class Model released by September 2, 2026?
- Will Moonshot be the second-best Chinese AI company at the end of August 2026?
Crossbook publishes every forecast it makes, timestamped before the answer is known and scored against the market afterwards. See the public record and the rules it is held to.