Cheapest Function Calling

Last 30 days

Uptime

100%

Response time

28 ms typical, 89 ms slowest 5%

Last check

2 h ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://modelprices.xyz/llm/cheapest/function-calling"

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fmodelprices.xyz%2Fllm%2Fcheapest%2Ffunction-calling
const res = await pay("https://modelprices.xyz/llm/cheapest/function-calling");
console.log(await res.json());

Example input

{}

Example output

{
  "board": "Cheapest tool-use models",
  "generated_at": "2026-07-14T02:00:00.000Z",
  "model_count": 24,
  "models": [
    {
      "context_window": 200000,
      "id": "gemini-3-flash",
      "input_per_mtok": 3,
      "output_per_mtok": 15,
      "provider": "anthropic"
    }
  ]
}

Security scan

• No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks