What it's the best tool for
- Low latency and high throughput
- Tool-call pricing up to 50% cheaper than Grok
- Balanced common sense without sycophancy
- Great for production agents and support bots
- Fresh knowledge cutoff via X feed
When to reach for something else
- Context and reasoning below Grok 4.20 flagship
- Less guarded answers — fact-check outputs
- No image or video generation
- Slightly weaker on non-English languages
How Grok 4 Fast responds
Grok 4 Fast
Four scenarios where it pays for itself
More about Grok 4 Fast
Grok 4 Fast Online — xAI's Speed-Tier LLM
Grok 4 Fast is xAI's speed-optimised Grok variant, built for agent loops and snappy chat. Hosted on NetRoom with no VPN needed.
Why it's fast
Inference and tool-use pipelines are tuned for low latency — tool-call pricing is cut up to 50% vs standard Grok, responses stream almost in real time.
Where it fits
Moderation, classification, production chatbots, fast RAG, news-stream parsing. Noticeably cheaper than Claude Sonnet or GPT-5 on typical chat loads.
Why via NetRoom
No foreign card, no VPN, transparent ruble pricing. Just open a tab and ship.
Use Grok 4 Fast via the API
The same engine, straight from your code: one key and one balance for text, images, video and sound. Pay only for the requests you make.
curl https://net-room.com/api/v1/chat/completions \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model": "x-ai/grok-4-fast", "messages": [{"role": "user", "content": "Hello"}]}'The format is OpenAI SDK compatible — point base_url at https://net-room.com/api/v1 and use your NetRoom key.
The model id is already in the example. The full parameter reference and prices live in GET /api/v1/models and in the docs.
Try Grok 4 Fast
right now
Free access to basic models. No card, no obligations.