xAI: Grok 4
x-ai/grok-4Grok 4 is xAI's latest reasoning model with a 256k context window. It supports parallel tool calling, structured outputs, and both image and text inputs. Note that reasoning is not exposed, reasoning cannot be disabled, and the reasoning effort cannot be specified. Pricing increases once the total tokens in a given request is greater than 128k tokens. See more details on the xAI docs
- Modalities
- TextImagetoText
- In / out price
- $3.00 / $15.00per 1M
- Context
- 256K
- Released
- Dec 13, 2025
Providers
RedPill routes this model across providers with automatic fallbacks. Pricing is unified, so you pay the same price no matter which provider serves your request, while live metrics show first-token latency, speed, and uptime.
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Start building
Call this model from your application, or through your agents.
For applications
Point your OpenAI SDK at the Gateway. Chat, completions, and embeddings work unchanged.
For agents
Connect Claude Code, Codex, Pi, and more through Private AI Proxy. Traffic is protected while a verified session is active.
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.redpill.ai/v1",
apiKey: process.env.REDPILL_API_KEY,
});
const response = await client.chat.completions.create({
model: "x-ai/grok-4",
messages: [{ role: "user", content: "Say hello." }],
});