Grok 4.20 Multi-Agent
A version of xAI's Grok chatbot designed for teamwork, where several AI helpers research and combine information together for developers.
This came out before trckr began following OpenRouter, so it was added on Nov 6 without an alert. Its release date comes from models.dev.
Key facts
- Released
- Mar 9, 2026
- What it does
- Text and chat: Writes, answers questions and holds a conversation.Thinks first: Can reason step by step before it answers: slower, but better at maths, code and tricky questions.Sees images: Understands pictures, screenshots and charts you share with it.Reads files: Reads documents such as PDFs.
Can I use it?
In an app
No app mentioned so far.
For developers
Developers can use it now through an API: How developers plug a model into their own apps and pay per use. A model that's "in the API" can be used by programmers, even if it isn't in a chat app yet..
Download
Not downloadable: it runs on the maker's own servers.
Price and limits
What developers pay to use it through the API: How developers plug a model into their own apps and pay per use. A model that's "in the API" can be used by programmers, even if it isn't in a chat app yet., per million Tokens: The small chunks of text a model reads and writes, about three-quarters of a word each. Prices and limits are counted in tokens. sent (input) or written back (output), and how much it can take in at once.
- Input
- $1.25
- per million tokensCached: $0.20
- Output
- $2.50
- per million tokens
- Context window: How much a model can keep in mind at once: your question, any files you share and its own replies. Measured in tokens; 1,000 tokens is about 750 words.
- 1M tokens
- about 750,000 words
View moreView less
- Longest answer
- 30K tokens (about 23,000 words)
- Over 200K tokens
- $2.50 input, $5.00 output per million tokens
From the lab's own listing on models.dev and OpenRouter, checked .
Compare Grok 4.20 Multi-Agent with
It came out 20 days after Grok 4.20, the lab's previous model.
The details
xAI's Grok 4.20 Multi-Agent is a variant of Grok 4.20 built for collaborative workflows, where multiple Agent: An AI that doesn't just answer but takes steps on its own to finish a task: searching the web, running code or using apps. work in parallel on deep research, Tool use: A model's ability to use other software, like a calculator, a web search or a booking system, instead of only writing text. and synthesis.
Model ID: The exact name developers type to use a model, like gpt-5-mini. New IDs often show up in a lab's systems before the official announcement, which is how trckr spots many releases early.
x-ai/grok-4.20-multi-agentgrok-4.20-multi-agent-0309Timeline
/OpenRouterFirst signal
/xAI APIOfficial
grok-4.20-multi-agent-0309
Get alerts like this the moment they happen.
From xAI and every other major lab.