Announcing Grok Voice Think Fast 2.0, our next-generation voice model with improved intelligence, transcription accuracy, and conversational capabilities.
We've open-sourced Grok Build and have reset usage limits for all users.
Open sourcing Grok Build allows anyone to support making a reliable and robust harness. Check out our code, including the Git repo for the Grok Build CLI.
We care deeply about your privacy and respect customer choice. For teams using zero data retention, no trace and code data is ever retained. All API key use of Grok Build also respects ZDR.
If ZDR is disabled, the /privacy command is available in the CLI to disable data retention, which also deletes previously synced data.
Run the /privacy command to view or change your settings at any time.
Try Grok 4.5 today in the SpaceXAI console, Grok Build, and Cursor. We've reset all limits so you can start for free
Note: Grok 4.5 isn't available in the EU yet. EU availability is expected later this month.
Grok 4.5 is efficient and fast. It uses half as many tokens per task, delivers higher tokens per second, and costs less than half as much as comparable models, at $2/M input and $6/M output tokens.
Announcing Grok 4.5, our first model trained specifically for coding and agents. It was trained with Cursor and offers frontier intelligence at leading speeds and cost efficiency.
Two days into blind voting of voice models on our Humanness Index™, and xAI's Grok TTS model is at the top of the pack.
Its humanness score? 96, just 4 points under a real human voice (100).
The Humanness Index takes one voice and one quote, clones it across every major model, then plays the results blind for real listeners to score.
Hear it, cast your votes, and contribute to the leaderboard 👇