Cursor users can try it on any plan; for API buyers it is mid-priced, and UK access isn't confirmed.
Kenning's take
What it does
Grok 4.5 is a SpaceXAI model for coding, agent tasks and knowledge work, trained alongside Cursor. It has a 500K-token context window and SpaceXAI says it needs about half the steps of comparable models. It is available in the xAI API, in Grok Build and in Cursor on all plans.
- 500K-token context window
- Reasoning effort from low to xhigh
- Trained alongside Cursor
- Function calling and structured outputs
- Available in Cursor and Grok Build
Who it suits. Developers using Cursor, Grok Build or the xAI API for coding agents.
Key facts
- Category
- AI models
- Part of
- Grok
- Made by
- SpaceXAI (formerly xAI)
- Based in
- United States
- Released
- 8 July 2026
- How to get it
- xAI API (model grok-4.5), Grok Build, and Cursor on all plans
- Works on
- API, Grok Build, Cursor
- API price
- $2 per million input tokens, $6 per million output
FAQ
When was Grok 4.5 released?
xAI's API release notes list it on 8 July 2026; the announcement post is dated 16 July 2026.
How much does Grok 4.5 cost?
$2 per million input tokens and $6 per million output tokens.
Where can I use Grok 4.5?
In the xAI API, Grok Build and Cursor.
Facts from the maker's own pages and the sources listed. Checked 2026-10-11.
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