Grok 4.3
xAI
xAI's flagship Grok model (April 2026), recommended for chat and coding as its most intelligent and fastest model. Features a 1M-token context window, native video input (an xAI first), and tight integration with real-time search tools.
Strengths
- xAI's most intelligent and fastest model for chat and coding
- 1M-token context window
- Native video input - an xAI first
- Competitive pricing ($1.25/$2.50) for a frontier model
Caveats
- November 2024 base knowledge cutoff - relies on search tools for recency
- Proprietary, API-only (no open weights)
- No vendor-published release date, training cutoff: omitted rather than asserted from a secondary source
- Vendor
- xAI
- Context Window
- 1,000,000 tokens
- License
- Proprietary
- Modalities
- textimagevideo
Capabilities
Vision
Audio
Video
Tool Use
Resources
Pricing
$1.25 per 1M input / $2.50 per 1M output tokens for prompts under 200k tokens; $2.50 per 1M input / $5.00 per 1M output tokens for prompts of 200k or more (cached input $0.20 and $0.40 respectively).