# Grok 4.1 Fast Usage, Cost & Rank | OpenCode Data

xAI's fast agentic tool-calling model with a 2M context window; non-reasoning variant for low-latency responses

- Page: https://opencode.ai/data/xai/grok-4-1-fast
- JSON: https://opencode.ai/data/xai/grok-4-1-fast.json
- Model ID: xai/grok-4.1-fast
- Lab: xAI

## Model facts

| Fact | Value |
| --- | --- |
| Context window | 2M |
| Max output | 30K |
| Knowledge cutoff | - |
| Release date | 2025-11-19 |
| Input modalities | text, image |
| Output modalities | text |
| Reasoning | No |
| Tool calling | Yes |
| Open weights | No |

## Methodology

- Updates: Aggregated every hour. Days and weeks use UTC.
- Tokens: Input, output, reasoning, and cached tokens for each request.
- Users and sessions: Approximate counts of distinct users and OpenCode sessions.
- Cost: Session cost is the average cost per OpenCode session. Token prices are list prices from the OpenCode model catalog.
- Retention: The share of a model's users in one week who use it again the next week.
- Citation: Cite OpenCode Data (opencode.ai/data) with the update time shown at the top of the page.