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xAI

Grok 1.5

xAI · Grok line · flagship

Released March 28, 2024Replaced by Grok 2

What changed

No verified summary yet. We only publish what the maker's own numbers support, so this card fills in as the sources come in.

Where the Grok line stands

Grok 4.6 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 4.6

xAI · Grok line · flagship
Mid-cycle28 of ~72 days into its usual cycle

A post-training step on Grok 4.5 that adds an xhigh reasoning-effort level; cached input pricing rose from $0.30 to $0.50 per million tokens.

Released Aug 12, 2026 · what changed →
Days since last release
Grok 4.6 · Aug 12, 2026
28
days
Usual gap
72
days
Recent gaps
Grok 4.6 · Aug 2026
35
Grok 4.5 · Jul 2026
69
Grok 4.3 · Apr 2026
72
Grok 4.20 · Feb 2026
92

Every Grok release

Newest first. See the full line with every card →

  1. Aug 12, 2026Grok 4.6
  2. Jul 8, 2026Grok 4.5
  3. Apr 30, 2026Grok 4.3
  4. Feb 17, 2026Grok 4.20
  5. Nov 17, 2025Grok 4.1
  6. Jul 9, 2025Grok 4
  7. Feb 17, 2025Grok 3
  8. Aug 14, 2024Grok 2
  9. Mar 28, 2024Grok 1.5 · this page
  10. Nov 3, 2023Grok 1

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