xAI
Grok 4.1 Fast
grok-4.1-fastList pricing
—- Input
- $0.25 / 1,000,000 tokens
- Output
- $0.625 / 1,000,000 tokens
- Cache read
- $0.0625 / 1,000,000 tokens
Discount history
No discount history yet.
Model details
- Input
- text
- Output
- text
- Context window
- 1,000,000 tokens
- Maximum output
- 30,000 tokens
- Availability
- Unknown
- Updated
- 11/8/2026, 3:58:06 AM UTC
Capacity is reserved when your request is accepted.
Capabilities
ChatStreamingTool callingVisionReasoning
Supported parameters
include_reasoninglogprobsmax_tokensreasoningresponse_formatseedstructured_outputstemperaturetool_choicetoolstop_logprobstop_p