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xAI

Grok 1.5

xAI · Grok line · flagship

Released May 15, 2024Replaced by Grok 2

Grok 1.5 was released by xAI on May 15, 2024, as a flagship model in the Grok line.

  • Release 2 of 12 in the Grok line.
  • Came 194 days after Grok 1, released Nov 3, 2023.
  • Replaced by Grok 2 on August 13, 2024, 90 days later.
  • These days the line ships a new model about every 59 days.

No detailed card for this model: we only add numbers published by the maker or by independent benchmarks.

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Where the Grok line stands

Grok 4.7 is the current model in this line. The card shows how long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.

xAI

Grok

xAI · flagship line

Latest: Grok 4.7 · Sep 21, 2026

AnnouncedGrok 4.8 · announced Sep 14, 2026, 40 days ago

“Grok 4.8, which is a 2.5T model trained with our new C++ software stack, will finish training this week and start RL” — xAI, Sep 14, 2026 · Elon Musk on X

A larger base model than Grok 4.6, trained longer on multi-hour agentic tasks, at the same $2 / $6 price and the same 500k-token context.

What changed in Grok 4.7 →
Days since last release
33
days
Usual gap
59
days
Recent gaps
Grok 4.7 · Sep 2026
40
Grok 4.6 · Aug 2026
35
Grok 4.5 · Jul 2026
82
Grok 4.3 · Apr 2026
59

Every Grok release

Newest first. See the full line with every card →

  1. Sep 21, 2026Grok 4.7
  2. Aug 12, 2026Grok 4.6
  3. Jul 8, 2026Grok 4.5
  4. Apr 17, 2026Grok 4.3
  5. Feb 17, 2026Grok 4.20
  6. Nov 17, 2025Grok 4.1
  7. Jul 9, 2025Grok 4
  8. Feb 17, 2025Grok 3
  9. Dec 14, 2024grok-2-1212
  10. Aug 13, 2024Grok 2
  11. May 15, 2024Grok 1.5 · this page
  12. Nov 3, 2023Grok 1