xAI: Grok-4.20-Multi-Agent
Grok-4.20-Multi-Agent is a language model from xAI released on Mar 9, 2026. It reads text and images and writes text, with a 128K token context window.
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It costs $2 per million input tokens and $6 per million output tokens. Cached input bills at $0.20, 90% less than fresh input.
It supports tool calling, structured JSON output and prompt caching.
5 providers serve it, including Kilo Gateway, Venice AI and NanoGPT. The lowest input price is $1.25 per million tokens at xAI.
- Modalities
- In / out price
- $2 / $6 per 1M
- Context
- 128K
- Max output
- n/a
- Released
- Mar 9, 2026
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Grok-4.20-Multi-Agent pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $2 / 1M tokens | |
|---|---|---|
| Output | $6 / 1M tokens | |
| Cached input (read) | $0.20 / 1M tokens | 90% off input |
Grok-4.20-Multi-Agent providers
5 providers serve it, including Kilo Gateway, Venice AI and NanoGPT. The lowest input price is $1.25 per million tokens at xAI. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| xAI First party | $1.25 | $2.50 | $0.20 | 1M | 30K |
| Kilo Gateway | $1.25 | $2.50 | $0.20 | 2M | 1.8M |
| Venice AI | $1.42 | $2.83 | $0.23 | 2M | 128K |
| NanoGPT | $2 | $6 | $1 | 2M | 131K |
| Poe | $2 | $6 | $0.20 | 128K | n/a |
What Grok-4.20-Multi-Agent costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call Grok-4.20-Multi-Agent through an OpenAI compatible API.
- Tools
tools - Structured outputs
structured_outputs
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Grok-4.20-Multi-Agent questions
How much does the Grok-4.20-Multi-Agent API cost?
$2 per million input tokens and $6 per million output tokens, with cached input at $0.20. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Grok-4.20-Multi-Agent?
128,000 tokens of input. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve Grok-4.20-Multi-Agent?
5 providers serve it, including Kilo Gateway, Venice AI and NanoGPT. The lowest input price is $1.25 per million tokens at xAI. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does Grok-4.20-Multi-Agent support tool calling?
Yes. It accepts tool definitions and can return JSON that matches a schema, which is what an agent needs to call your APIs.
Is Grok-4.20-Multi-Agent open source?
No. xAI serves it through an API only, so you cannot download the weights or host it yourself.
When was Grok-4.20-Multi-Agent released?
Mar 9, 2026.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.
Building on Grok-4.20-Multi-Agent?
I test your real tasks on it and the two closest alternatives, then ship the agent on whichever wins on cost and accuracy.
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