grok-4.5 pricing
grok-4.5 from xAI costs $2.00 per 1M input tokens and $6.00 per 1M output tokens. Cached input is $0.300 per 1M. Context window 500,000 tokens.
API id grok-4.5 · xAI · source · updated 2026-08-11
$2.00
Input / 1M tokens
$6.00
Output / 1M tokens
$0.300
Cached input / 1M
500K
Context window
Long-context pricing
Prompts over 128K tokens are billed at $4.00 per 1M input and $12.00 per 1M output — roughly 2.0× the standard input rate. Budget for this if you send large documents.
What grok-4.5 costs in practice
| Workload | Input tokens | Output tokens | Estimated cost |
|---|---|---|---|
| Short chat turn | 1,000 | 500 | $0.0050 |
| Document summary | 50,000 | 2,000 | $0.11 |
| 1M tokens in, 200K out | 1,000,000 | 200,000 | $3.20 |
Estimates use the standard tier and ignore caching discounts, so real bills with repeated prompt prefixes are typically lower.
Common questions
- How much does grok-4.5 cost per 1M tokens?
- grok-4.5 costs $2.00 per 1M input tokens and $6.00 per 1M output tokens on the standard tier. Cached input is $0.300 per 1M.
- What is grok-4.5's context window?
- grok-4.5 accepts up to 500,000 tokens in a single request.
- Is there a cheaper Grok model than grok-4.5?
- Yes. grok-4.20-0309-reasoning is $1.25 per 1M input tokens versus $2.00 for grok-4.5, with a 1,000,000 token context window.
- Where does this grok-4.5 price come from?
- Directly from xAI's published pricing page, re-read every day and normalized to USD per 1,000,000 tokens.