Flagship multimodal reasoning with 1M context; the published RL card lists 1.02T total, 42B active parameters and MIT licensing. AA records 46 in the same table; weights, hosted API and UltraSpeed serving are distinct runtime conditions.
Test configuration: Effort not named in source table
Source read · · v4.3.2
Each model uses its highest tested setting, with fallback conditions retained. Original K3 remains at max44 from its readable individual page; the aggregate page now lists K3.1 Pro separately. Scores use one evaluator. The index mainly evaluates English text tasks; examine Chinese and image capabilities separately.
Official documentation retires the old IDs with errors at 10:00 Beijing time and asks users to switch to V2.6; this is endpoint retirement, not a V2.6 launch that day.