AI Model Atlas / xAI
Grok 4.20 Multi-Agent
One million input tokens cost $1.25 and one million output tokens $2.50. Context window: 2M tokens, about 3,333 A4 pages.
What it costs in practice
Pricing per million tokens doesn't mean anything to anyone, so I convert it to three tasks that people actually give to models. The usage assumptions are listed for each row so you can verify them.
| Task | Input | Output | Cost |
|---|---|---|---|
| 1500-word articlebrief plus finished text in English | 1,500 tokens | 2,200 tokens | $0.0074 |
| 100 chat queries700 tokens per question and 400 per answer | 70,000 tokens | 40,000 tokens | $0.19 |
| Hour of work with an agentagent reads repository and writes fixes | 250,000 tokens | 30,000 tokens | $0.39 |
Technical details
| Provider | xAI |
| Modalities | text + image + files → text |
| Context window | 2M tokens (~3,333 A4 pages) |
| Maximum response | 1.8M tokens |
| Step-by-step reasoning | yes |
| Tool calling | no |
| Forced JSON format | yes |
| Knowledge cutoff | 2025-09-01 |
| Cache read | $0.20 per million |
| Content moderation | no extra filter |
How it compares to the rest
The database contains 469 models. In terms of input pricing Grok 4.20 Multi-Agent is more expensive than 69 percent of paid models. A longer context window is available in 0 models.
Input price history
2026-09-08 · $1.252026-11-11 · $1.25
The chart shows the price of a million input tokens on consecutive measurement days. History starts on the day I launched the atlas and grows with each day. I don't backfill data.
Alternatives at a similar price
Models from other providers whose cost for the same article comes out closest.
| Model | Input / M | Output / M | 1500-word article | Context |
|---|---|---|---|---|
| Seed-2.0-CodeBytedance seed | $0.50 | $3.00 | $0.0074 | 262k |
| Nano Banana 2 (Gemini 3.1 Flash Image)Google | $0.50 | $3.00 | $0.0074 | 131k |
| Nano Banana 2 (Gemini 3.1 Flash Image Preview)Google | $0.50 | $3.00 | $0.0074 | 66k |
| Gemini 3 Flash PreviewGoogle | $0.50 | $3.00 | $0.0074 | 1M |
Compare Grok 4.20 Multi-Agent with another model or go back to the full database 469 models.