Cheapest Grok 4.3 API: RunAPI is 96% below the official price
Grok 4.3 costs $1.25/$2.50 per 1M tokens from xAI. The lowest quote in the index is RunAPI: $0.056 in, $0.113 out. Full table and buying checklist below.
| # | Provider | 1M input | 1M output | vs list | Tokens per $100 |
|---|---|---|---|---|---|
| — | Official list | $1.25 | $2.50 | 0% | 68.6M |
| 1 | $0.056 | $0.113 | −96% | 1.52B | |
| 2 | $0.188 | $0.375 | −85% | 457M | |
| 3 | $0.188 | $0.375 | −85% | 457M | |
| 4 | $1.80 | $3.60 | +44% | 47.6M |
Scroll the table sideways to see every price.
Tokens per $100 assume a “code” mix: 5 input tokens per output token. Prices are crawled; verify them on the provider page before buying.
What to check before buying
- Test the key with the free API checker — it verifies the endpoint responds, without sending tokens.
- Compare the blended cost for your workload, not just the input price: output tokens dominate in agent workloads.
- Check uptime and minimum top-up: the cheapest provider is useless if it is down half the day.