X
Grok 4 Fast Reasoning
Grok 4 Fast Reasoning, a language model from X.ai.
modelOverride: { model: "grok-4-fast-reasoning" }
XX.ai·Released September 2025
Pricing
- Input
- $0.20 / 1M
- Output
- $0.50 / 1M
Specifications
- Context window
- 2,000,000 tokens
- Max output
- 2,000,000 tokens
- Released
- September 2025
Use this model
await mindstudio.generateText({ message: "...", modelOverride: { model: "grok-4-fast-reasoning", }, });