Grok 4.20 Multi Agent API
xAI's chat model. Call it on 666 AI with the same API key as every other model. Pay as you go; prices follow the upstream in real time and this page updates hourly.
| Vendor | xAI |
| Type | chat |
| Price | $3.38 per 1M input tokens · $6.75 per 1M output tokens |
| Context window | 256K tokens |
| Live test | Passed our live test in the last 7 days |
| Model ID (use this in your request) | x-ai/grok-4.20-multi-agent |
How to call Grok 4.20 Multi Agent
The API is OpenAI-compatible. Replace YOUR-ENDPOINT with the endpoint shown on your API Key page after you sign up, and YOUR-KEY with your key.
curl https://YOUR-ENDPOINT/v1/chat/completions \
-H "Authorization: Bearer YOUR-KEY" \
-H "Content-Type: application/json" \
-d '{"model": "x-ai/grok-4.20-multi-agent", "messages": [{"role": "user", "content": "Hello"}]}'from openai import OpenAI
client = OpenAI(base_url="https://YOUR-ENDPOINT/v1", api_key="YOUR-KEY")
r = client.chat.completions.create(
model="x-ai/grok-4.20-multi-agent",
messages=[{"role": "user", "content": "Hello"}],
)
print(r.choices[0].message.content)Similar models — price comparison
| Model | Price |
|---|---|
| Qwen3.7 Max | $2.7 per 1M input tokens · $8.1 per 1M output tokens |
| Qwen3.8 2.4T A95B | $2.7 per 1M input tokens · $8.1 per 1M output tokens |
| Qwen3.8 Max | $2.7 per 1M input tokens · $8.1 per 1M output tokens |
| Grok 4.5 | $2.7 per 1M input tokens · $8.1 per 1M output tokens |
| Grok 4.6 | $2.7 per 1M input tokens · $8.1 per 1M output tokens |
| Qwen3.8 Max 0902 | $2.7 per 1M input tokens · $8.1 per 1M output tokens |
More models from xAI
| Model | Price |
|---|---|
| Grok 4.20 0309 Reasoning | $1.86 per 1M input tokens · $3.71 per 1M output tokens |
| Grok 4.20 Multi Agent 0309 | $1.86 per 1M input tokens · $3.71 per 1M output tokens |
| Grok 4.7 | $2.97 per 1M input tokens · $8.91 per 1M output tokens |
| Grok Imagine Image | $0.027 per image |
| Grok Imagine Image Pro | $0.0945 per image |
| Grok Imagine Video | $0.0675 – $0.0945 per second |
| Grok Imagine Video 1.5 Preview | $0.108 – $0.3375 per second |
| Grok Voice TTS 1.0 | $20.25 per 1M characters |
FAQ
How much does the Grok 4.20 Multi Agent API cost?
On 666 AI, Grok 4.20 Multi Agent costs $3.38 per 1M input tokens · $6.75 per 1M output tokens. You pay only for what you use — no monthly fee. Prices follow the upstream in real time; this page updates every hour.
Can I use the official OpenAI SDK?
Yes. The API is OpenAI-compatible: in the OpenAI Python or Node.js SDK just change base_url and api_key, and set model to x-ai/grok-4.20-multi-agent.
How do I pay?
Bank card (including Google Pay / Apple Pay), USDT / ETH, or bank wire. Top up once and usage is deducted as you go.