Grok 4.1 Fast
DeprecatedGrok 4.1 Fast is xAI's language model with a 2.0M context window and up to 30K output tokens, available from 2 providers, starting at $1.25 / 1M input and $2.50 / 1M output. xAI's fast agentic tool-calling LLM with a 2M context window, excelling at real-world use cases like customer support and deep research.
| Benchmarks | |
|---|---|
| Intelligence Index | #247 |
| Math Index | #193 |
| MMLU-Pro | #196 |
| GPQA | #308 |
| HLE | #357 |
| LiveCodeBench | #191 |
| IFBench | #300 |
| Time to First Token | #299 |
| SciCode | #300 |
| AIME 2025 | #193 |
| LCR | #293 |
| TerminalBench Hard | #190 |
| TAU2 | #168 |
| Output TPS | #531 |
Capabilities
Input3/5
Text✓
Image✓
Audio✓
Video·
PDF·
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities6/13
Reasoning✓
Adaptive Reasoning·
Function Calling✓
Parallel Function Calling·
Structured Outputs✓
Native JSON Schema✓
Web Search✓
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching✓
Assistant Prefill·
Pricing by Provider
US Dollar ($)
Per 1M tokens
| Provider | Standard | ||
|---|---|---|---|
| Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | |
| $5.00 | $25.00 | N/A | |
| $1.25 | $2.50 | $0.2 | |
Cost Calculator
US Dollar ($)
Preset:
Versions
| Version | Released | Context | Input / 1M | Output / 1M | Status |
|---|---|---|---|---|---|
| Grok 4.6 | 500K | $2.00 | $6.00 | Available | |
| Grok 4.5 | 500K | $2.00 | $6.00 | Available | |
| Grok 4.3 | 1.0M | $1.25 | $2.50 | Available | |
| Grok 4.20 | 2.0M | $1.25 | $2.50 | Available | |
| Grok 4.20 Multi-Agent | 2.0M | $1.25 | $2.50 | Available | |
| Grok 4.20 Multi-Agent Beta | 2.0M | $1.25 | $2.50 | Available | |
| Grok 4.20 Non-Reasoning | 2.0M | $1.25 | $2.50 | Available | |
| Grok 4.20 Reasoning | 2.0M | $1.25 | $2.50 | Available | |
| Grok 4.1 Fast | 2.0M | $1.25 | $2.50 | Current | |
| Grok 4.1 Reasoning | 2.0M | $0.200 | $0.500 | Deprecated | |
| Grok 4.1 Fast Non-Reasoning | 2.0M | $0.200 | $0.500 | Deprecated |