Grok 4.20 pricing
xAI · list prices as of 2026-09-29
| Input | $1.25 per 1M tokens |
|---|---|
| Output | $2.50 per 1M tokens |
| Cached input (read) | $0.20 per 1M tokens |
| Context window | 1M tokens |
| Longest answer | 1M tokens |
What a call costs
| Typical call | Input tokens | Output tokens | Per call | Per month at 1,000 a day |
|---|---|---|---|---|
| Chat reply | 1,000 | 300 | $0.002 | $60.00 |
| Document summary | 6,000 | 400 | $0.0085 | $255.00 |
| Code change | 3,000 | 1,200 | $0.00675 | $202.50 |
No caching or batch discount. Your own prompt will differ: count it exactly below.
Price your own prompt on Grok 4.20Similarly priced models
- Grok 4.3 (xAI): about the same
- GPT-5.4 mini (OpenAI): 1.0× more
- Gemini 3.6 Flash (Google): 1.1× cheaper
- Gemini 3.7 Flash (Google): 1.1× cheaper
- Gemini 3.8 Flash (Google): 1.1× cheaper
Questions
How much does Grok 4.20 cost?
Grok 4.20 costs $1.25 per million input tokens and $2.50 per million output tokens, as of 2026-09-29.
How much is one Grok 4.20 call?
A call with 1,000 input tokens and a 300-token answer costs about $0.002, or $60.00 a month at 1,000 calls a day.
How big is the Grok 4.20 context window?
1,000,000 tokens.