xAI · Grok (xAI)
Grok 4.20
ActiveReleased 4 months ago· Feb 1, 2026Multimodal model
Extended-reasoning model with Think Mode; strongest hallucination resistance in the Grok family ($2.00/$6.00 per 1M).
- API string
- grok-4.20
- Context window
- 1M ctx
- Tier
- Reasoning
- Released
- Feb 1, 2026
Release & change timeline
1 event- Release
Grok 4.20 released
Extended-reasoning model with Think Mode; $2.00/$6.00, 1M context. Guide gives month only (~Feb 2026).
Part of the Grok (xAI) version timeline. Catch Me Up — everything that changed across AI & smart home ↗