grok-4-20-reasoning

xAI Grok 4.20 推理版本，侧重多步骤分析、数学与代码推理，适合复杂问题问答和知识工作。

Model ID: grok-4-20-reasoning · Type: chat · Provider: xAI

Endpoints: /v1/chat/completions · /v1/messages · /v1/responses

Pricing

Context tiers

Capabilities

• vision
• function_calling
• prompt_caching

import os

from openai import OpenAI

client = OpenAI(api_key=os.environ["ROUTER_API_KEY"], base_url="https://api.router.ai/v1")
resp = client.chat.completions.create(
    model="grok-4-20-reasoning",
    messages=[{"role": "user", "content": "Hello"}],
)
print(resp.choices[0].message.content)

FAQ

How much does grok-4-20-reasoning cost on J8API?

grok-4-20-reasoning (`grok-4-20-reasoning`) is billed per usage at $1/1M in · $2/1M out, in USD. Current pricing is always listed at https://j8api.com/models/grok-4-20-reasoning.

How do I call grok-4-20-reasoning through J8API?

Send a request to https://api.router.ai/v1/chat/completions with the header `Authorization: Bearer <your API key>` and `"model": "grok-4-20-reasoning"`. The API is OpenAI-compatible, so any OpenAI SDK works by changing base_url to https://api.router.ai/v1 — no other code change.

Which endpoints does grok-4-20-reasoning support?

grok-4-20-reasoning can be called on: /v1/chat/completions; /v1/messages; /v1/responses.

What can grok-4-20-reasoning do?

grok-4-20-reasoning supports: vision, function_calling, prompt_caching.

Who makes grok-4-20-reasoning?

grok-4-20-reasoning is a chat model from xAI, available through the J8API gateway with the same API key as every other model.

Call it through the J8API OpenAI-compatible endpoint (API base: https://api.router.ai/v1). AI agents can browse the catalog and call any text model through MCP (https://mcp.router.ai/mcp); for image, video and other modalities use the API above.

API reference · All models