# xAI Releases Grok 4.5, Opus-Class Model Trained on Cursor Data

> xAI has released Grok 4.5, which Elon Musk is billing as an "Opus-class" model and, more pointedly, as the strongest agentic coding system his team has shipped. It was trained across tens of thousands of Nvidia GB300 GPUs using new techniques for keeping very large runs stable, and its datasets lean heavily on coding, science, engineering and math. One detail stands out: the model was trained in part on data from Cursor, the AI code editor, and it ships inside Cursor on every plan from day one. Pricing lands at $2 per million input tokens and $6 per million output, with configurable reasoning effort so developers can trade speed against depth. xAI claims it beats comparable frontier models on real engineering tasks and multi-step agent workflows, the benchmarks that increasingly matter more than raw chat quality. The interesting part is not another leaderboard entry but the tightening loop between model makers and the coding tools built on them. Training on Cursor's data and shipping inside Cursor blurs the line between platform and application, and it shows how central developer workflows have become to the race for frontier relevance.

_Section: [Daily AI Updates](https://www.wortins.com/daily-ai) · Source: TechCrunch · Published Monday, July 20, 2026_

## Wortins' read

xAI has released Grok 4.5, which Elon Musk is billing as an "Opus-class" model and, more pointedly, as the strongest agentic coding system his team has shipped. It was trained across tens of thousands of Nvidia GB300 GPUs using new techniques for keeping very large runs stable, and its datasets lean heavily on coding, science, engineering and math. One detail stands out: the model was trained in part on data from Cursor, the AI code editor, and it ships inside Cursor on every plan from day one. Pricing lands at $2 per million input tokens and $6 per million output, with configurable reasoning effort so developers can trade speed against depth. xAI claims it beats comparable frontier models on real engineering tasks and multi-step agent workflows, the benchmarks that increasingly matter more than raw chat quality. The interesting part is not another leaderboard entry but the tightening loop between model makers and the coding tools built on them. Training on Cursor's data and shipping inside Cursor blurs the line between platform and application, and it shows how central developer workflows have become to the race for frontier relevance.

## Source

[Read the full story at TechCrunch](https://techcrunch.com/2026/07/08/spacexai-releases-grok-4-5-which-elon-describes-as-an-opus-class-model/)

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