xAI · AI model API pricing
How much does Grok 4.5 cost?
xAI's flagship — by far the cheapest output tokens of any frontier-class model ($6 vs $25–50 elsewhere).
Rate card
| Input tokens | $2 / 1M |
| Cached input | $0.50 / 1M |
| Output tokens | $6 / 1M |
| Context window | 500K |
What that means per month
| Workload | Tokens / month | Cost / month |
|---|---|---|
| Prototype | 1M in · 0.3M out | $3.80/mo |
| Small app | 10M in · 3M out | $38/mo |
| Production app | 50M in · 15M out | $190/mo |
| High volume | 200M in · 60M out | $760/mo |
| Heavy platform | 1B in · 300M out | $3,800/mo |
Standard on-demand rates from xAI's official model docs, last checked 2026-07-16. Rates shown are for prompts under 200k tokens; above that, prices double. xAI offers up to $175/month in free credits via its data-sharing program. Monthly figures exclude caching and batch discounts. Confirm live pricing before committing.
Cheaper alternatives
At a reference workload of 10M input / 3M output tokens a month, these cost less than Grok 4.5 ($38/mo):
-
Mistral Medium 3.5 $37.5/mo -
Qwen3-Max $30/mo -
GPT-5.6 Luna $28/mo