LLMAPI only
Grok 4
xAI
Updated May 21, 2026 · Benchmarks via Artificial Analysis, specs & pricing via OpenRouter · Methodology · Report an error
Superseded by Grok 4.1
Specifications
- Type
- LLM
- Access
- API only
- Released
- July 9, 2025
- License
- Proprietary
- Context window
- 256,000 tokens
- Knowledge cutoff
- December 31, 2024
- Output speed
- 100 tok/s
- Latency (TTFT)
- 0.7s
- Input
- Text, Image
- Output
- Text
- API pricing
- $3.00 in · $15.00 out / 1M tokens
Capabilities
Function callingStructured output
Benchmarks
Our take
xAI’s first frontier reasoning flagship, launched with a $300/mo multi-agent “Heavy” tier and a then-leading ARC-AGI-2 score among closed models.