What is Grok V9-Medium?

On May 24-25, 2026, Elon Musk announced that the Grok V9-Medium foundational model has completed training. The model has 1.5 trillion parameters and was supplemented with extensive Cursor data during training .

The model will replace the current 0.5T V8-Small model currently supporting Grok production traffic .

Key Details

  • Parameters: 1.5 trillion — significant upgrade from 0.5T V8-Small
  • Training Data: Extensive Cursor data for enhanced coding capabilities
  • Status: Training complete, evaluation positive
  • Next Steps: RLHF (Reinforcement Learning from Human Feedback) in days
  • Release Timeline: 2-3 weeks from announcement

Corporate Context

SpaceX acquired xAI in February 2026. The AI project has been renamed SpaceXAI with new management team in place .

Coding Capabilities

The inclusion of extensive Cursor data during training positions Grok V9-Medium as a serious competitor to Claude Code, Codex, and GitHub Copilot for programming tasks.

Expected Release

RLHF starting in days, with public release expected in 2-3 weeks (approximately mid-June 2026) .

Pricing

Not yet announced — likely X Premium+ or separate subscription.

Pros

  • 1.5T parameters — massive scale
  • Cursor training data for coding excellence
  • Direct Elon confirmation (not rumor)
  • Will replace smaller model in production
  • SpaceX infrastructure backing

Cons

  • Release 2-3 weeks away (mid-June)
  • Pricing unknown
  • Benchmarks not yet released
  • SpaceX acquisition integration still new

Who Should Use It?

Perfect for: Developers, X users, and AI enthusiasts wanting large-scale model with specialized coding training.

Verdict

Grok V9-Medium represents serious evolution in xAI model capabilities. The Cursor training data suggests strong coding performance. With SpaceX infrastructure backing, this could be competitive with leading models .

Rating: N/A (Pre-release) - Coming in 2-3 weeks.