Grok 4.1 Fast Non-Reasoning prioritizes speed and throughput by skipping the chain-of-thought reasoning phase, returning direct responses with low latency. It handles the same multimodal inputs as the reasoning variant and keeps a 2 million token context window, making it suitable for applications where fast responses matter more than step-by-step deliberation. This variant is aimed at high-throughput, real-time use cases such as customer support, content generation, and straightforward information retrieval where a quick first response is the priority. By skipping reasoning tokens it reduces latency on each request. Released in November 2025 alongside xAI's Agent Tools API, Grok 4.1 Fast was trained with long-horizon reinforcement learning for consistent tool calling across its full context window, giving the non-reasoning mode strong agentic behavior at speed.
Grok 4.1 Fast Non-Reasoning runs on 2 different routes through the Opper gateway. Compare residency, ZDR, and training posture at a glance — full data-handling detail per route below.
| Provider | Region | Zero data retention | Training | Input | Output |
|---|---|---|---|---|---|
| Google Cloud | Multi | Enterprise | No | $0.20 | $0.50 |
| Google Cloud | US | Enterprise | No | $0.20 | $0.50 |
Training posture across routes: No training on prompts by default.
Each route hosting Grok 4.1 Fast Non-Reasoning has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.
Zero data retention is available via Opper Enterprise contract. No training on customer data. US; SCCs; DPA available.
Zero data retention is available via Opper Enterprise contract. No training on customer data. US; SCCs; DPA available.
Call Grok 4.1 Fast Non-Reasoning through the Opper gateway with one API key. Let your coding agent set it up, or call it directly — Opper is drop-in compatible with the OpenAI, Anthropic, and Google AI SDKs.
Copy this and paste it into your coding agent — Claude Code, Cursor, Codex, and more — and it'll wire up Opper for you.
import OpenAI from "openai";const client = new OpenAI({apiKey: process.env.OPPER_API_KEY,baseURL: "https://api.opper.ai/v3/compat",});const completion = await client.chat.completions.create({model: "vertexai/grok-4-1-fast-non-reasoning",messages: [{ role: "user", content: "Hello" }],});console.log(completion.choices[0].message.content);
Side-by-side on privacy, EU hosting, pricing, and benchmarks.
