Grok 4 vs GPT-5
Sample workload: short support reply (~512 output tokens). Open the calculator for your own prompt.
| Field | Grok 4 | GPT-5 |
|---|---|---|
| Provider | xAI | OpenAI |
| Accuracy | Approx | Exact |
| Input / 1M | $1.25/1M | $1.25/1M |
| Output / 1M | $2.50/1M | $10.00/1M |
| Sample input tokens | 25 | 16 |
| Sample request cost | $0.001311 | $0.00514 |
| Pages | Model page | Model page |
Try your own prompt
Sample costs above use a fixed support-chat prompt. For your text, open the main calculator with either model preselected.
Grok 4 in calculator · GPT-5 in calculator · Count tokens (Grok 4) · Count tokens (GPT-5) · All comparisons
How LLM pricing works · Exact vs Approx · Grok 4 page · GPT-5 page
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How LLM API pricing works · How prompt cost is calculated · Prompt caching explained · Exact vs Approx
Sources and references
Official documentation used for definitions, counting methods, or rate cards. Always confirm critical budgets on the provider page.