modelprices.xyz
x402Grade BLast checked 4 hours ago
GET https://modelprices.xyz/llm/cheapest/function-calling
Cheapest tool-use LLM leaderboard: the 50 lowest-cost AI models that support function calling / tool use, ranked by token price across 70+ providers. Input, output and cache USD per 1M tokens with context window and modality flags joined in. The cheapest way to pick a model for an agent loop that needs reliable structured tool calls. Refreshed hourly.
Price$0.01per price or market lookup · paid in USD on Base
Uptime100%
4/4 probes · 1118 ms
Score72Grade B
Paid usage, 30 days2payers · 2 calls
How to buy
This endpoint takes pay-per-call payments over x402. Call it once without paying to see its live price; any x402 client then pays and retries automatically.
curl -i -X GET "https://modelprices.xyz/llm/cheapest/function-calling"
# HTTP/1.1 402 Payment Required: price, asset and payTo are in the responseRecent checks
| Checked (UTC) | Result | Status | Time | Live price |
|---|---|---|---|---|
| 2026-10-11 09:00 | Valid 402 | 402 | 995 ms | $0.01 |
| 2026-10-11 04:30 | Valid 402 | 402 | 1702 ms | $0.01 |
| 2026-10-11 00:00 | Valid 402 | 402 | 1241 ms | $0.01 |
| 2026-10-10 19:15 | Valid 402 | 402 | 761 ms | $0.01 |
Receipts
No test purchases yet. Graded test purchases are next on our list; until then every number here comes from unpaid checks.
What a check proves