Grok 4.20 Beta Reasoning pricing
Source: litellm · updated 2026-10-28
Short answer: Grok 4.20 Beta Reasoning costs $1.25 per million input tokens and $2.50 per million output tokens. That is a 3:1 blended rate of $1.56 per million tokens, ranking it #534 of 713 tracked models by input price.
Input / 1M
$1.25
Output / 1M
$2.50
Output ÷ input
2.00×
Context window
1,000,000
Price breakdown
| Metric | USD |
|---|---|
| Input, per 1M tokens | $1.25 |
| Output, per 1M tokens | $2.50 |
| Output ÷ input multiple | 2.00× |
| 3:1 blended, per 1M tokens | $1.56 |
| Context window | 1,000,000 tokens |
| Vendor | xai |
What a typical workload costs
| Monthly volume | Input cost | Output cost | Total |
|---|---|---|---|
| 1M in / 250K out | $1.25 | $0.625 | $1.88 |
| 10M in / 2.5M out | $12.50 | $6.25 | $18.75 |
| 100M in / 25M out | $125 | $62.50 | $188 |
Other xai models
| Model | Input | Output |
|---|---|---|
| Grok Code Fast | $1.00 | $2.00 |
| Grok Code Fast 1 0825 | $1.00 | $2.00 |
| Grok 4.20 Multi Agent Beta 0309 | $1.25 | $2.50 |
| Grok 4.20 Beta 0309 Reasoning | $1.25 | $2.50 |
| Grok 4.20 0309 Reasoning | $1.25 | $2.50 |
Cheaper alternatives
Next cheaper option: GLM 5 at $1.00 per 1M input tokens. Next step up: Anthropic Claude 3.5 Haiku at $0.800 per 1M input tokens.
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