Grok 4.20 Multi-Agent
by SpaceXAIReleased Mar 31, 2026
x-ai/grok-4.20-multi-agent- Reads images
- Reads files and PDFs
- Answers in a JSON schema
- Reasons before it answers
Grok 4.20 Multi-Agent is a variant of SpaceXAI’s Grok 4.20 designed for collaborative, agent-based workflows. Multiple agents operate in parallel to conduct deep research, coordinate tool use, and synthesize information...
- Input / 1M tokens
- $1.50
- Output / 1M tokens
- $3.00
- Context
- 2M
- Longest answer
- 1.8M
What it costs
What each call is charged to the token's AI credit.
| Billed for | You pay |
|---|---|
| Input tokens | $1.50 / 1M |
| Output tokens | $3.00 / 1M |
| Cached input, read | $0.24 / 1M |
| Each web search | $0.006 |
| Prompts over 200,000 tokens | $3.00 in, $6.00 out |
A typical call
A short chat turn: 2,000 tokens in, 500 out.
- per call
- $0.0045
- calls per $20
- 4,444
What it can do
From its listing. The router passes every field through.
- Reads imagesYes
- Reads files and PDFsYes
- Hears audioNo
- Calls toolsNo
- Answers in a JSON schemaYes
- Reasons before it answersYes
- Searches the webYes
- Caches long promptsYes
- Draws imagesNo
Call it
Any router key works, in the format your SDK already speaks.
import OpenAI from "openai";const ai = new OpenAI({ baseURL: "https://relayfor.si/api/v1", apiKey: process.env.RELAYFOR_ROUTER_KEY,});const reply = await ai.chat.completions.create({ model: "x-ai/grok-4.20-multi-agent", messages: [{ role: "user", content: "Welcome the 1,000th holder in one line." }],});Specifications
What its maker and providers list for it.
- Reads
- Text, Images, and Files
- Writes
- Text
- Context
- 2,000,000 tokens
- Longest answer
- 1,800,000 tokens
- Reasoning effort
- low to xhigh
- Knowledge cutoff
- Sep 1, 2025
- Released
- Mar 31, 2026
- Moderation
- None
Request fields
The fields its providers accept, passed through as you send them.
- include_reasoning
- logprobs
- max_tokens
- reasoning
- reasoning_effort
- response_format
- seed
- structured_outputs
- temperature
- top_logprobs
- top_p
Questions
How much does Grok 4.20 Multi-Agent cost?
$1.50 per million input tokens and $3.00 per million output tokens, paid from the token's AI credit. A call of 2,000 tokens in and 500 out costs about $0.0045.
How do I call Grok 4.20 Multi-Agent?
Make a router key for one of your tokens on the dashboard, point any OpenAI or Anthropic SDK at https://relayfor.si/api/v1 and send the model id x-ai/grok-4.20-multi-agent. The token's AI credit pays for each call.
How long a prompt can Grok 4.20 Multi-Agent take?
Up to 2,000,000 tokens of context, and up to 1,800,000 tokens in one answer.
Are my prompts stored?
No. The RFS Router passes each call through and keeps only its token counts and cost, for the token's usage page.
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