GPT 5.5 METR 50% time horizon

Prediction market on manifold. This market will resolve to the highest 50% time horizon, as reported by METR, for the first GPT 5.5 model to appear on METR's graph. GPT 5.5.x variants (Pro, Codex) count for the purpose of this market. GPT 5.4 or earlier would not count. GPT 5.6 would not count. 50% time horizon is a measure of AI autonomy based on the length of tasks that AI can do: roughly, it is the time that humans take to complete tasks that an AI system can successfully do 50% of the time. See METR's Time Horizon 1.1 update for the technical definition. As of May 2026, frontier time horizons are around 12 hours, with a doubling time of roughly 4 months. [image]Left bounds inclusive, right bounds exclusive. See also: @lPZslPSyQd @gZsNQCnsuh @zsdEyhOyPP @sESZgIgALU @n0ncl5cgpP @NClqRpg0yz @APnLcl9A26 @LCNpQ6LN5U @nRpZqZ5np5 @ySlEnlzCEN (this market) @s5Al2cstZI

24h Volume: $26.339. Liquidity: $1,000. Resolves: 7/31/2026.