xAI finishes training Grok V9-Medium, a 1.5T-param model tuned on Cursor developer data
Read this because The headline isn't the 1.5T parameter count — it's the corpus. Tuning a frontier model on Cursor's real developer workflows is a direct bid for the coding layer Claude and Codex dominate. Treat the benchmarks and timeline as vendor-sourced until weights or an API ship.
Musk says xAI's 1.5T-param Grok V9-Medium finished training (May 25), ~3x its production model and trained on Cursor dev data — mid-June release expected.