Tuesday Jun 30
STRATEGYxAI

Grok 4.5 Tests At Tesla And SpaceX

28JUN
1.5T PARAMSGROK 4.5SPACEX

Elon Musk put Grok 4.5 into private beta at Tesla and SpaceX first. It runs on a 1.5-trillion-parameter base, trained partly on Cursor coding data. Early evals put it near Anthropic's Opus.

Musk's own companies are the test lab. Tesla and SpaceX engineers run Grok 4.5 before the public sees it. Real workloads, real feedback, fast.

The Cursor data matters. SpaceX bought Cursor for $60 billion this month. Now its coding data trains Grok. xAI says it ships a freshly trained model every month.

Vertical integration is the bet. Own the coding tool, own the data, own the model. Watch whether monthly retrains hold quality or just chase headlines.

full brief & sources

⚡ Why this matters

  • xAI is using its own companies as a private testing ground before public release.
  • Grok 4.5 trains on Cursor data, tying the SpaceX-Cursor deal directly into model quality.
  • A monthly model cadence is aggressive versus rivals' quarterly cycles.

🔍 What happened

  • Jun 28: Musk says Grok 4.5 is in private beta at Tesla and SpaceX.
  • Built on xAI's 1.5-trillion-parameter V9 foundation model.
  • Cursor coding data added in supplemental training.
  • Early evals reportedly near or above Anthropic's Opus.
  • xAI plans freshly trained models every month this year.

💬 Smart takes

  • Elon Musk: Grok 4.5 early evals show performance close to, perhaps exceeding, Opus.
  • Skeptic: in-house evals from the CEO are marketing until independent benchmarks confirm them.

🧭 Where this goes

  1. LikelyGrok 4.5 hits public release within weeks of the beta.
  2. LikelyxAI leans on Cursor data as a coding-quality edge.
  3. Possiblemonthly retrains strain compute and quality control.
  4. Wild CardTesla ships a Grok-powered coding assistant to outside developers.

🥄 The Spoon Take

Musk is building a closed loop. Buy the coding tool, feed its data to the model, test it on your own engineers, ship monthly. If it works, xAI's data edge compounds. If the monthly pace breaks quality, it's just noise dressed as speed.

🤔 Pushback

CEO-reported evals and a private beta aren't a product. Until outsiders test Grok 4.5, near-Opus is a claim, not a result.

·Times of AI - Grok 4.5 private beta·TechTimes - Grok V9 model·xAI - News