X.ai in a statement announced in a live stream Grok 4.5 release on 8 July 2026.
It is billed as the strongest model ever released.
Developed by its AI division this year.
It improves programming and financial tasks.
The model is released together integration into Cursor as a plugin, reported by Bloomberg and Forbes.
Elon Musk described it as an "Opus-class" system in a tweet.
Pricing is set lower than that of Fable 5 and GPT 5.5, making it more affordable, according to reports.
The launch mirrors several AI updates in recent months this quarter.