xAI · Grok (xAI)
Grok 4
SupersededOriginal Grok 4 flagship ($3.00/$15.00, 256K); retired from most access May 15, 2026 and replaced by Grok 4.3.
About this version
Grok 4 is a legacy‑tier model in the grok family that launched on July 1 2025 with an expanded context window of 256 000 tokens and was offered as the original flagship version. It remained available until mid‑May 2026, when it was retired from most access points and succeeded by Grok 4.3.
- API string
- grok-4
- Context window
- 256K ctx
- Tier
- Legacy
- Released
- Jul 1, 2025
Release & change timeline
2 events- Retirement
Grok 4 retired from most access
Retired May 15, 2026 alongside Grok 4 Fast and Grok Code Fast 1; requests redirect to Grok 4.3 pricing.
- Release
Grok 4 released
First Grok positioned as frontier-competitive; 256K context, $3.00/$15.00; launched with Heavy variant.
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