Grok 4.3
xAI's current flagship, fully rolled out to the API at the end of April 2026 at $1.25/$2.50 per MTok, roughly 40% below its predecessor on input and 60% on output. It adds native video input, document generation for PDFs, spreadsheets and slides, improved tool-calling, and three adjustable reasoning-intensity levels, alongside a 1M-token context window.
Grok 4.3 is a frontier AI model from xAI. It costs $1.250 per million input tokens and $2.500 per million output tokens (blended $1.625/M), with a 1,000,000-token context window.
- Aggressive pricing for a flagship tier
- Native video input
- Document generation (PDF, spreadsheet, slides)
- Three adjustable reasoning-intensity levels
- 1M-token context
- Built-in web search for current information
- Cost-sensitive frontier workloads
- Video and mixed-media analysis
- Report and document generation
- Tool-calling agents
Benchmarks
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See all 8 →Frequently asked questions
How much does Grok 4.3 cost?
Grok 4.3 costs $1.250 per million input tokens and $2.500 per million output tokens, for a blended reference rate of $1.625 per million tokens.
What is Grok 4.3's context window?
Grok 4.3 supports up to 1,000,000 tokens of context in a single request.
What is Grok 4.3 best for?
Grok 4.3 is well suited to Aggressive pricing for a flagship tier, Native video input and Document generation (PDF, spreadsheet, slides).
Who makes Grok 4.3?
Grok 4.3 is developed and served by xAI. It was released in Apr 2026.