X.ai in a statement announced officially Grok 4.5 upgrade on 8 July 2026.
It is billed as the top‑tier model to date.
Developed in collaboration with SpaceXAI this year.
It improves software development and financial tasks.
The model is introduced simultaneously integration into Cursor for developers, reported by Bloomberg and Forbes.
Elon Musk called it as an "Opus-class" system during a live chat.
Pricing is set below that of Fable 5 and GPT 5.5, budget‑friendly, according to reports.
The launch mirrors several AI updates from Musk’s companies recently.