xAI: Grok 4 Fast
🇺🇸 xAI · Grok 4
Input Price $0.200 per million tokens NT$6.4
Output Price $0.500 per million tokens NT$16.0
Context Window 2M tokens Output limit: 30K
OpenRouter Route Price Please verify with official pricing pages
| Dimension | Unit | Price (USD) |
|---|---|---|
| Input | per 1M tokens | $0.200 |
| Output | per 1M tokens | $0.500 |
| Cached Input | per 1M tokens | $0.050 |
| Web Search | per search | $0.0050 |
- Provider
- xAI (xAI)
- Model Family
- Grok 4
- Version String
- x-ai/grok-4-fast
- Status
- active
- Modality
- text, image, file
- Context Window
- 2,000,000 tokens
- Output Limit
- 30,000 tokens
Index Metrics
Cross-domain capability indexes evaluated by Artificial Analysis — Artificial Analysis
Agentic Index 40 B Measured: 2026-05-27
Coding Index 27 C Measured: 2026-05-27
Intelligence Index 35 B Measured: 2026-05-27
Benchmark Scores
Data source: Artificial Analysis
AA-LCR 64.7% B Measured: 2026-05-27
GPQA Diamond 84.8% A Measured: 2026-05-27
IFBench 50.5% C Measured: 2026-05-27
MMMU Pro 61.8% B Measured: 2026-05-27
Non-Hallucination 34.0% Measured: 2026-05-27
Omniscience Accuracy 22.6% Measured: 2026-05-27
SciCode 44.2% B Measured: 2026-05-27
Tau2 65.8% Measured: 2026-05-27
TerminalBench 18.9% Measured: 2026-05-27
90-Day Price Trend
Input / Output price (USD per 1M tokens)
Past 90 days of records; every price change is shown here
| Date | Dimension | Price (USD) | Source |
|---|---|---|---|
| 2026-05-14 | Web Search | $0.0050 | openrouter |
| 2026-05-14 | Cached Input | $0.050 | openrouter |
| 2026-05-14 | Output | $0.500 | openrouter |
| 2026-05-14 | Input | $0.200 | openrouter |
| 2026-05-13 | Web Search | $0.0050 | openrouter |
| 2026-05-13 | Cached Input | $0.050 | openrouter |
| 2026-05-13 | Output | $0.500 | openrouter |
| 2026-05-13 | Input | $0.200 | openrouter |
| 2026-05-12 | Web Search | $0.0050 | openrouter |
| 2026-05-12 | Cached Input | $0.050 | openrouter |
| 2026-05-12 | Output | $0.500 | openrouter |
| 2026-05-12 | Input | $0.200 | openrouter |
| 2026-05-11 | Web Search | $0.0050 | openrouter |
| 2026-05-11 | Cached Input | $0.050 | openrouter |
| 2026-05-11 | Output | $0.500 | openrouter |
| 2026-05-11 | Input | $0.200 | openrouter |
| 2026-05-10 | Web Search | $0.0050 | openrouter |
| 2026-05-10 | Cached Input | $0.050 | openrouter |
| 2026-05-10 | Output | $0.500 | openrouter |
| 2026-05-10 | Input | $0.200 | openrouter |
| 2026-05-10 | Web Search | $0.0050 | openrouter |
| 2026-05-10 | Cached Input | $0.050 | openrouter |
| 2026-05-10 | Output | $0.500 | openrouter |
| 2026-05-10 | Input | $0.200 | openrouter |
| 2026-05-09 | Web Search | $0.0050 | openrouter |
| 2026-05-09 | Cached Input | $0.050 | openrouter |
| 2026-05-09 | Output | $0.500 | openrouter |
| 2026-05-09 | Input | $0.200 | openrouter |
| 2026-05-09 | Web Search | $0.0050 | openrouter |
| 2026-05-09 | Cached Input | $0.050 | openrouter |
| 2026-05-09 | Output | $0.500 | openrouter |
| 2026-05-09 | Input | $0.200 | openrouter |
| 2026-05-09 | Web Search | $0.0050 | openrouter |
| 2026-05-09 | Cached Input | $0.050 | openrouter |
| 2026-05-09 | Output | $0.500 | openrouter |
| 2026-05-09 | Input | $0.200 | openrouter |
| 2026-05-09 | Web Search | $0.0050 | openrouter |
| 2026-05-09 | Cached Input | $0.050 | openrouter |
| 2026-05-09 | Output | $0.500 | openrouter |
| 2026-05-09 | Input | $0.200 | openrouter |
| 2026-05-09 | Web Search | $0.0050 | openrouter |
| 2026-05-09 | Cached Input | $0.050 | openrouter |
| 2026-05-09 | Output | $0.500 | openrouter |
| 2026-05-09 | Input | $0.200 | openrouter |
| 2026-05-09 | Web Search | $0.0050 | openrouter |
| 2026-05-09 | Cached Input | $0.050 | openrouter |
| 2026-05-09 | Output | $0.500 | openrouter |
| 2026-05-09 | Input | $0.200 | openrouter |
| 2026-05-09 | Web Search | $0.0050 | openrouter |
| 2026-05-09 | Cached Input | $0.050 | openrouter |
Description
Grok 4 Fast is xAI's latest multimodal model with SOTA cost-efficiency and a 2M token context window. It comes in two flavors: non-reasoning and reasoning. Read more about the model...
Key Insights
Key data points from this page for quick reference and citation.
- xAI: Grok 4 Fast Input price: $0.2/M tokens
- xAI: Grok 4 Fast Output price: $0.5/M tokens
- Context window: 2,000,000 tokens
- Provider: xAI
- Model family: Grok 4
- Modalities: text, image, file
- Data source: OpenRouter, updated daily