# Grok 4.20 Multi-Agent

> Grok 4.20 Multi-Agent is a proprietary language model from xAI, released on 9 Mar 2026. It accepts text, images and PDFs and generates text, with a 1M-token context window and up to 30K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $1.25 per million input tokens and $2.50 per million output tokens (xAI API), across 2 providers we track.

Source page: https://www.aimodel.directory/models/grok-4-20-multi-agent
Last verified: 4 Oct 2026

## Specifications

- **Developer:** xAI
- **Release date:** 9 Mar 2026 (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/xai/models/grok-4.20-multi-agent-0309.toml)
- **Status:** Generally available (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/xai/models/grok-4.20-multi-agent-0309.toml)
- **Weights:** Proprietary (API only) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/xai/models/grok-4.20-multi-agent-0309.toml)
- **Context window:** 1M (1,000,000 tokens) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/xai/models/grok-4.20-multi-agent-0309.toml)
- **Max output:** 30K tokens (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/xai/models/grok-4.20-multi-agent-0309.toml)
- **Knowledge cutoff:** 1 Sept 2025 (source: OpenRouter, https://openrouter.ai/x-ai/grok-4.20-multi-agent)
- **Input:** Text, images and PDFs (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/xai/models/grok-4.20-multi-agent-0309.toml)
- **Output:** Text (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/xai/models/grok-4.20-multi-agent-0309.toml)
- **Reasoning mode:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/xai/models/grok-4.20-multi-agent-0309.toml)
- **Tool calling:** No (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/xai/models/grok-4.20-multi-agent-0309.toml)
- **Structured output:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/xai/models/grok-4.20-multi-agent-0309.toml)

## API pricing (USD per 1M tokens)

| Provider | Input | Output | Cached input | Context |
|---|---|---|---|---|
| xAI API | $1.25 | $2.50 | $0.20 | 1M |
| OpenRouter | $1.25 | $2.50 | $0.20 | 2M |

## FAQ

### What is the context window of Grok 4.20 Multi-Agent?

Grok 4.20 Multi-Agent has a context window of 1,000,000 tokens (1M) and can generate up to 30,000 tokens in a single response, according to models.dev.

### How much does the Grok 4.20 Multi-Agent API cost?

Through xAI API, Grok 4.20 Multi-Agent costs $1.25 per million input tokens and $2.50 per million output tokens. Prices last verified 4 Oct 2026.

### Is Grok 4.20 Multi-Agent open source?

No. Grok 4.20 Multi-Agent is a proprietary model; xAI has not released its weights. It is available through APIs including xAI API, OpenRouter.

### When was Grok 4.20 Multi-Agent released?

xAI released Grok 4.20 Multi-Agent on 9 Mar 2026, according to models.dev.

### Which providers offer Grok 4.20 Multi-Agent?

We track Grok 4.20 Multi-Agent on 2 providers: xAI API, OpenRouter.

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Data licensed CC BY 4.0. Cite as: AI Model Directory, "Grok 4.20 Multi-Agent", https://www.aimodel.directory/models/grok-4-20-multi-agent