xAI · Grok (xAI)
Grok 4 Heavy
ActiveReleased 11 months ago· Jul 1, 2025Multimodal model
Premium maximum multi-agent reasoning tier for the hardest multi-step problems; enterprise/contact pricing.
- API string
- grok-4-heavy
- Context window
- 256K ctx
- Tier
- Reasoning
- Released
- Jul 1, 2025
Release & change timeline
No dated events logged for this version yet.
Patches, price changes, benchmarks, and deprecations for Grok 4 Heavy will appear here as they’re recorded. Follow the broader Catch Me Up digest in the meantime.
Part of the Grok (xAI) version timeline. Catch Me Up — everything that changed across AI & smart home ↗