Grok 4.20 Multi-Agent

Name: SpaceXAI: Grok 4.20 Multi-Agent
Brand: x-ai
SKU: x-ai/grok-4.20-multi-agent
Price: 1.375 USD
Availability: InStock

x-ai/grok-4.20-multi-agent

Grok 4.20 Multi-Agent is a variant of SpaceXAI’s Grok 4.20 designed for collaborative, agent-based workflows.

$1.375 in · $2.75 out per 1M tokens2M contextMar 31, 2026

about 0.2¢ a message

A typical message: about 500 tokens you send and 500 it writes.

Chat with Grok 4.20 Multi-Agent

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Spec sheet

Published facts from the catalog, billed prices and what we measured here. Anything not measured says so.

Price, billed here

Input, per 1M tokens: $1.375provider $1.25
Output, per 1M tokens: $2.75provider $2.50
Cached input, per 1M: $0.22provider $0.20
Margin: +10%

Context and formats

Context window: 2,000,000 tokens
Longest answer: 1,800,000 tokens
Reads: text, images, and files
Makes: text
First listed: 2026-03-31

Measured here, last 7 days

First token, median: not measured
Answered without error: not measured

Tools and JSON

Tool calling: not declared
JSON output: declaredthe provider's claim, not yet measured here

Price and latency history as JSON: GET /api/planet/history?id=x-ai/grok-4.20-multi-agent.

About

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...

In xAI's words.

Try it here

Cmd+Enter sends

The answer appears here.

Measured here

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Call it

Use one OpenAI compatible endpoint, this model's id and an am_live_ key from the dashboard. You can also try it in chat first with no key.

curl https://useantimatter.com/v1/chat/completions \
  -H "Authorization: Bearer $ANTIMATTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "x-ai/grok-4.20-multi-agent", "messages": [{"role": "user", "content": "Hello"}]}'

Everything else is in the docs.

Embed this

A badge showing this model's live price per million tokens, as billed here, for a README or a site. It links back to this page.

Grok 4.20 Multi-Agent price on Antimatter

<a href="https://useantimatter.com/planet/x-ai/grok-4.20-multi-agent"><img src="https://useantimatter.com/api/badge/price?id=x-ai%2Fgrok-4.20-multi-agent" alt="Grok 4.20 Multi-Agent price on Antimatter" height="28"></a>

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