xAI · Released Mar 9, 2026Grok 4.20 Multi-Agent
Grok model for agentic tool use, reasoning, coding, and live assistance.
- Capability
- —No ECI score yet
- Input
- $1.25per 1M tokens
- Output
- $2.50per 1M tokens
- Context
- 1M30K max output
What it costs
- Input
- $1.25per million tokens
- Output
- $2.50per million tokens
- Cached input
- $0.20per million tokens
- Over 200K tokens
- $2.50 / $5.00input / output per million
- Blended (3:1)
- $1.56pricier than 65% of priced models
Typical monthly bills
| Monthly usage | Estimated cost |
|---|---|
| Side project2M input + 0.5M output tokens | $3.75 |
| Team assistant25M input + 5M output tokens | $43.75 |
| Production app250M input + 50M output tokens | $437.50 |
Official xAI API price, as listed on models.dev.
Independent benchmarks
Epoch AI has not published a Capabilities Index score for Grok 4.20 Multi-Agent yet.
The details
- Lab
- xAI
- Released
- Mar 9, 2026
- Context window
- 1,000,000 tokens
- Max output
- 30,000 tokens
- Inputs
- Text, Images, PDFs
- Output
- Text
- Reasoning
- Adjustable effort low · medium · high · xhigh
- Tool calling
- No
- Structured output
- Yes
- Weights
- Proprietary
- API model ID
grok-4.20-multi-agent-0309on xAI- Availability
- 1 API providerlisted on models.dev
More from xAI
About Grok 4.20 Multi-Agent
How much does Grok 4.20 Multi-Agent cost?
Grok 4.20 Multi-Agent costs $1.25 input / $2.50 output per million tokens (official xAI API price). Cached input is $0.20 per million tokens. Requests over 200K tokens are billed at $2.50 input / $5.00 output. At a 3:1 input-to-output mix that is $1.56 per million tokens, more expensive than 65% of the 360 priced models we track.
What is the context window of Grok 4.20 Multi-Agent?
Grok 4.20 Multi-Agent accepts up to 1,000,000 tokens per request and can write up to 30,000 tokens in one response.
How good is Grok 4.20 Multi-Agent?
Epoch AI has not published a Capabilities Index score for Grok 4.20 Multi-Agent yet.
Is Grok 4.20 Multi-Agent open source?
No. Grok 4.20 Multi-Agent is proprietary; you use it through xAI’s API or partner platforms.
What inputs does Grok 4.20 Multi-Agent support?
Grok 4.20 Multi-Agent accepts text, images and PDFs and replies in text. It is a reasoning model with low, medium, high and xhigh effort settings, does not support tool calling and can return structured JSON output.
When was Grok 4.20 Multi-Agent released?
xAI released Grok 4.20 Multi-Agent on Mar 9, 2026.
What are the best alternatives to Grok 4.20 Multi-Agent?
The closest current models from other labs on capability, price and release date are GLM-5-Turbo (Z.ai (Zhipu), $1.20 / $4.00), DeepSeek V4 Pro (DeepSeek, $1.32 / $3.00), MiMo-V2.5-Pro-UltraSpeed (Xiaomi, $1.30 / $2.61) and Gemini Robotics-ER 1.6 Preview (Google, $1.00 / $5.00).