xAIGrok 4.20 pricing
$1.25 per 1M input tokens and $2.50 per 1M output tokens. In real work that is 0.45¢ per chat answer and 2.0¢ to summarize a 20-page PDF.
What Grok 4.20 costs per task
Token counts estimated from a measured model of the same lab (Grok 4.7), rescaled by tokenizer. Reasoning tokens are billed as output.
| Task | Cost | Tokens used | Price rank | Basis |
|---|---|---|---|---|
| Answer a chat question | 0.45¢$4.53 / 1,000 | 1,280 in · 567 out · 603 reasoning | 220 of 336 | estimated |
| Reply to a customer email | 0.27¢$2.69 / 1,000 | 1,492 in · 106 out · 222 reasoning | 251 of 336 | estimated |
| Write a 1,500-word blog post | 1.00¢$9.98 / 1,000 | 1,296 in · 3,117 out · 227 reasoning | 180 of 336 | estimated |
| Write 10 product descriptions | 0.43¢$4.33 / 1,000 | 1,524 in · 922 out · 48 reasoning | 133 of 336 | estimated |
| Translate 1,000 words | 1.3¢$13.12 / 1,000 | 2,542 in · 1,316 out · 2,661 reasoning | 198 of 336 | estimated |
| Proofread one page (500 words) | 0.60¢$6.03 / 1,000 | 1,947 in · 648 out · 789 reasoning | 233 of 336 | estimated |
| Summarize a 20-page PDF | 2.0¢$20.09 / 1,000 | 13,954 in · 535 out · 523 reasoning | 238 of 336 | estimated |
| Extract data from an invoice | 0.55¢$5.45 / 1,000 | 1,617 in · 464 out · 909 reasoning | 236 of 336 | estimated |
| Analyze a 200-row spreadsheet | 8.6¢$85.73 / 1,000 | 6,014 in · 1,263 out · 30,023 reasoning | 275 of 336 | estimated |
| Answer from 5 retrieved documents (RAG) | 0.89¢$8.92 / 1,000 | 4,889 in · 212 out · 913 reasoning | 221 of 336 | estimated |
| Classify 100 support tickets | 1.0¢$10.34 / 1,000 | 2,512 in · 479 out · 2,400 reasoning | 212 of 336 | estimated |
| Review 500 lines of code | 9.5¢$94.65 / 1,000 | 6,185 in · 1,570 out · 33,199 reasoning | 288 of 336 | estimated |
| Write a SQL query | 0.55¢$5.52 / 1,000 | 1,372 in · 401 out · 1,121 reasoning | 236 of 336 | estimated |
| Run a 50-step coding agent | 73¢$726 / 1,000 | 2,403,075 in · 16,110 out · 45,450 reasoning | 202 of 336 | modeled |
Price at every provider
List prices per 1M tokens (input / output) at each host serving Grok 4.20 through OpenRouter today. Hosts can differ in quantization, context and speed.
| Provider | Input / output | Cached input | Context | Uptime |
|---|---|---|---|---|
xAIunknown | $1.25 / $2.50 | $0.20 | 2M | 100% |
xAIunknown | $1.25 / $2.50 | $0.20 | 2M | 100% |
xAIunknown | $2.50 / $5.00 | $0.40 | 2M | |
xAIunknown | $2.50 / $5.00 | $0.40 | 2M |
Price history
First seen in our price history on Apr 7, 2026 at $2.00 input / $6.00 output. Since then the output price moved from $6.00 to $2.50 per 1M tokens (1 change).
FAQ
How much does Grok 4.20 cost?
Grok 4.20 costs $1.25 per 1 million input tokens and $2.50 per 1 million output tokens, with cached input at $0.20 (list price on Oct 18, 2026). In practice one chat answer costs about 0.45¢ and summarizing a 20-page PDF about 2.0¢.
Where is Grok 4.20 cheapest?
Among 4 providers we track, the lowest list price today is at xAI: $1.25 input and $2.50 output per 1M tokens.
Is the Grok 4.20 cost per task measured or estimated?
Estimated: Grok 4.20 was not run directly. Tokens come from Grok 4.7 and are rescaled by the tokenizer of xAI. Real usage can differ.