Grok 4.6

Grok 4.6 is a model from xAI with frontier performance on coding, knowledge work and STEM, with a 500,000-token context window and up to 450,000 output tokens. xAI Grok 4.6 Frontier Coding & STEM, with a 500K token context window.

POST/v1/ai/chat

$0.01/call

Overview

Property	Value
Model ID	`x-ai/grok-4.6`
Context Window	500,000 tokens
Max Output	450,000 tokens
Input Price	$2.95 / 1M tokens
Output Price	$8.86 / 1M tokens

Usage

const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    model: 'x-ai/grok-4.6',
    messages: [{ role: 'user', content: 'Derive the closed-form sum of the first n squares and verify it for n=5.' }],
  }),
});
const { data } = await res.json();
console.log(data.message.content);

curl -X POST https://api.yepapi.com/v1/ai/chat \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "x-ai/grok-4.6", "messages": [{"role": "user", "content": "Derive the closed-form sum of the first n squares and verify it for n=5."}]}'

Request Body

Parameter	Type	Required	Description	Default
`model`	`string`	Yes	Model ID (e.g. `x-ai/grok-4.6`)	—
`messages`	`Message[]`	Yes	Array of `{ role, content }` objects	—
`maxTokens`	`number`	No	Maximum tokens in the response	Model default
`temperature`	`number`	No	Sampling temperature (0.0–2.0)	`1.0`
`topP`	`number`	No	Nucleus sampling threshold	`1.0`
`frequencyPenalty`	`number`	No	Penalize repeated tokens	`0`
`presencePenalty`	`number`	No	Penalize tokens already present	`0`
`stream`	`boolean`	No	Enable SSE streaming	`false`

Info

All AI models use the /v1/ai/chat endpoint. Specify the model with the model field.

Response

{
  "ok": true,
  "data": {
    "model": "x-ai/grok-4.6",
    "message": {
      "role": "assistant",
      "content": "Sum of k\u00b2 for k=1..n is n(n+1)(2n+1)/6. For n=5: 5\u00b76\u00b711/6 = 55, and 1+4+9+16+25 = 55."
    },
    "usage": {
      "promptTokens": 16,
      "completionTokens": 245,
      "totalTokens": 261
    }
  }
}

Streaming

Set "stream": true to receive Server-Sent Events. Each chunk contains a delta object:

data: {"delta":{"content":"Use"},"model":"x-ai/grok-4.6","index":0}
data: [DONE]

Under the Hood

We handle auth, billing, and response normalization — you just send messages.