September 2026 AI model releases

Question

This market resolves YES for each AI model that receives an official public release during September 2026. A release counts as available to users if it is widely made available through official channels (API, web interface, download, or official partnership).

Subvariants are model releases that share the same tier name (e.g., Flash Preview, Flash Live, Flash Instant, Flash Image all count for "Gemini 3.1 Flash"; 5.5-Thinking, 5.5-Instant, 5.5-Nano, 5.5-Pro all count for "GPT5.5"). Releases with a distinct tier name (Flash-Lite, Flash, Pro as a separate tier, etc.) do NOT count for an adjacent tier, even within the same model family. When in doubt, I'll use the official model name the company uses to classify it.

Please ask for clarifications. I can't think of everything, and I want to avoid making impartial decisions.

Also, if you would like any model to be added, ping me. I reserve the right to N/A the market within the first hour as I adjust liquidity.

Notes:

For the sake of this market, model releases are only available in the U.S. (ex. Claude Fable 5) will count as widely available for the purposes of this market.

Previous Months:

@/prismatic/june-2026-ai-model-releases

@/prismatic/march-2026-ai-model-releases

@/prismatic/april-2026-ai-model-releases

@/prismatic/may-2026-ai-model-releases

@/prismatic/july-2026-ai-model-releases

@/prismatic/august-2026-ai-model-releases

Manifold Markets · Answer

Per Manifold Markets prediction market, Gemini 3.x (or 4.x) Flash, followed by Claude Opus 5.x and GPT-5.7 are most likely. See the market for live updates (31 traders, as of Aug 31, 2026).