Grok 4.6

xAITextReasoningToolsVision

xAI's Grok 4.6: the newest frontier model - long-running agents, coding and reasoning.

Our price

$1.70 / $5.10

input / output per 1M

Official

$2.00 / $6.00

−15% vs official

Get an API key Open in playground

First request

from openai import OpenAI

client = OpenAI(
    base_url="https://api.altrouter.ai/v1",
    api_key="ar-...",
)

resp = client.chat.completions.create(
    model="grok-4.6",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)

API

OpenAI-compatible chat completions endpoint, with SSE streaming.

POST/v1/chat/completions

Body parameters

modelstringrequired"grok-4.6"

The model id.

messagesarrayrequired

The conversation: [{ role, content }].

streambooleandefault false

Stream the response over SSE.

temperaturenumber0–2default 1

Sampling randomness: lower is more deterministic, higher more creative.

top_pnumber0–1default 1

Nucleus sampling - the probability mass to sample from.

max_tokensnumber1–32000

Maximum tokens to generate.

reasoning_effortenumlow · medium · highdefault medium

Thinking budget for reasoning models.

seednumber0–2147483647

Seed for reproducibility.

frequency_penaltynumber-2–2

Penalizes tokens by their existing frequency.

presence_penaltynumber-2–2

Penalizes tokens that have already appeared.

web_searchbooleandefault false

Server-side web search - answers with live data.

Structured fields (tools, response_format, stop and more) are in the full parameter reference.

Response

idstring

Completion id.

choicesarray

Completions. Each: index, message { role, content, reasoning_content, tool_calls }, finish_reason.

usageobject

Tokens: prompt_tokens, completion_tokens, total_tokens.

Example

cURLPythonJSON

curl https://api.altrouter.ai/v1/chat/completions \
  -H "Authorization: Bearer ar-..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "grok-4.6",
  "messages": [
    {
      "role": "user",
      "content": "Hello!"
    }
  ],
  "reasoning_effort": "medium"
}'

Errors

400Invalid request.

401Missing or invalid API key.

402Insufficient credits, or the key’s spending cap is exhausted.

404Model not found.

429Rate limit exceeded.

First request

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