One agent session
1M input tokens and 100K output tokens, no caching.
- Input1M x $1.25 = $1.25
- Output0.1M x $2.50 = $0.25
$1.50per session
xAI - Closed weights
Grok 4.20 Multi-Agent Beta pricing and specs
Grok 4.20 Multi-Agent Beta is a closed-weights model from xAI that costs $1.25 per 1M input tokens and $2.50 per 1M output tokens on the first-party API, with a 1M-token context window.
Last verified from docs.x.ai. All sources
- Input / 1M
- $1.25
- Output / 1M
- $2.50
- Context
- 1M tokens
- Weights
- Closed
Pricing per 1M tokens
| Item | Price / 1M tokens |
|---|---|
| InputPrompts up to 200,000 tokens | $1.25 |
| OutputPrompts up to 200,000 tokens | $2.50 |
| Cache readPrompts up to 200,000 tokens | $0.20 |
| Batch inputBatch requests, prompts up to 200,000 tokens | $1 |
| Batch outputBatch requests, prompts up to 200,000 tokens | $2 |
| Long-context inputPrompts over 200,000 tokens | $2.50 |
| Long-context outputPrompts over 200,000 tokens | $5 |
| Long-context cache readPrompts over 200,000 tokens | $0.40 |
| Long-context batch inputBatch requests, prompts over 200,000 tokens | $2 |
| Long-context batch outputBatch requests, prompts over 200,000 tokens | $4 |
Note: Beta. Several agents run in parallel on one request, so token use per request is higher than single-agent Grok 4.20 at the same per-token price. Batch prices are the stated 20% batch discount applied to list rates. Docs context window is 1,000,000 (the gateway lists 2,000,000). Long-context rates apply to all tokens once the prompt reaches 200k. max output not stated. Server-side tool calls are billed separately and are left out of this entry.
Specs
- Context window
- 1,000,000 tokens
- Release date
- Provider
- xAI
- API model id
grok-4.20-multi-agent-0309- Vercel AI Gateway id
spacexai/grok-4.20-multi-agent- Weights
- Closed weights
What Grok 4.20 Multi-Agent Beta costs in practice
Worked from the standard list rates above, with the math shown so you can swap in your own token counts. These use the base rates, which apply while each request's prompt stays at or under 200,000 tokens; above that, Grok 4.20 Multi-Agent Beta bills $2.50 input and $5 output for the whole request.
A chat app
10,000 requests a day at 2K input and 500 output tokens each.
- Input20M x $1.25 = $25.00
- Output5M x $2.50 = $12.50
$37.50per day
$1,125.00 per 30-day month
The same session at a 90% cache hit
90% of the input is read from the prompt cache. The one-time cache write premium is not included.
- Cached input0.9M x $0.20 = $0.18
- Uncached input0.1M x $1.25 = $0.125
- Output0.1M x $2.50 = $0.25
$0.555per session
Compare with
| Model | Input / 1M | Output / 1M |
|---|---|---|
| Grok 4.20 Multi-Agent Beta (this page) | $1.25 | $2.50 |
| Amazon Nova 2 LiteAmazon | $0.30 | $2.50 |
| Dola Seed 2.1 TurboByteDance Seed | $0.50 | $2.50 |
| Gemini 2.5 FlashGoogle | $0.30 | $2.50 |
| Gemini 3.5 Flash-LiteGoogle | $0.30 | $2.50 |
| Grok 4.20xAI | $1.25 | $2.50 |
| Grok 4.20 (Non-Reasoning)xAI | $1.25 | $2.50 |
| Grok 4.3xAI | $1.25 | $2.50 |
| Grok Build 0.1xAI | $1 | $2 |
| Grok 4.5xAI | $2 | $6 |
| Grok 4.6xAI | $2 | $6 |
Related reading
- GPT-6 Sol vs Claude Opus 5.5 vs Grok 4.7: The September 2026 Price WarGPT-6 Sol vs Claude Opus 5.5 vs Grok 4.7 pricing: verified per-token rates, cost-per-task math and a decision guide for the September 2026 price war.
- Grok Bot's Core Primitive: Every Bot Gets a ComputerGrok Bot gives every Bot a persistent cloud computer with a browser and terminal. Why that one primitive explains routines, Bot teams, and always-on work.
- Grok Bot's Meta Controls: Oversight as a Product PrimitiveGrok Bot's meta controls make agent oversight a product primitive: approval gates, a chief-of-staff structure and escalation learning, not a settings page.
- Grok Bot Has the Right Shape: Four Primitives, Nothing ElseGrok Bot ships four primitives that compose - a text thread, its own cloud computer, a chief of staff over Bots, and show-it-once routines - and nothing else.
- Grok Bot Routines: Automations Without Automation-BuildingGrok Bot routines let you demonstrate a job once, correct it in plain language and hand the Bot the schedule. How it works and how approval gates keep it safe.
- Grok 4.6: xAI's Agent-Focused Update Matches GPT-5.6 Sol at the Same $2/$6 PriceGrok 4.6 release guide: xAI's agent-focused update matches GPT-5.6 Sol on the AA index at the same $2/$6 pricing, and runs in Cursor and OpenCode.
FAQ
How much does Grok 4.20 Multi-Agent Beta cost per million tokens?
Grok 4.20 Multi-Agent Beta costs $1.25 per 1M input tokens and $2.50 per 1M output tokens on xAI's first-party API, per docs.x.ai on October 17, 2026. Per 1M tokens, cache reads cost $0.20, and the batch rate is $1 input and $2 output. Prompts over 200,000 tokens are billed at $2.50 input and $5 output for the whole request.
What is Grok 4.20 Multi-Agent Beta's context window?
Grok 4.20 Multi-Agent Beta has a 1,000,000-token context window.
Are Grok 4.20 Multi-Agent Beta's weights open?
No. Grok 4.20 Multi-Agent Beta is a closed-weights model. You call it through xAI's API as grok-4.20-multi-agent-0309 or through Vercel AI Gateway as spacexai/grok-4.20-multi-agent.
When was Grok 4.20 Multi-Agent Beta released?
xAI released Grok 4.20 Multi-Agent Beta on March 10, 2026.
Sources
Last verified from docs.x.ai.
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