$0.01
per call · USD Coin on Base
Cheapest reasoning-model leaderboard: the 50 lowest-cost AI models with extended reasoning / chain-of-thought support, ranked by inference cost per token — o3, Claude 5 thinking, Gemini 3 Pro, DeepSeek R1, Qwen QwQ and more across 70+ providers. Input, output and cache USD per 1M tokens with context windows joined in. Refreshed hourly.
Endpoint
GET https://modelprices.xyz/llm/cheapest/reasoning1
Calls / 30d
1
Unique payers / 30d
Aug 29
Last called
exact
Payment scheme
Call this service
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";
const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);
const res = await fetchWithPay("https://modelprices.xyz/llm/cheapest/reasoning", {
method: "GET",
});
const data = await res.json();curl -X GET \
"https://modelprices.xyz/llm/cheapest/reasoning" \
-H "X-PAYMENT: <signed x402 payment>"Example response
{
"board": "Cheapest reasoning models",
"generated_at": "2026-07-14T02:00:00.000Z",
"model_count": 24,
"models": [
{
"context_window": 200000,
"id": "deepseek-r1",
"input_per_mtok": 3,
"output_per_mtok": 15,
"provider": "anthropic"
}
]
}Payment details
0x63a20fa244d3e6a8902121e99704b7f857dc6ebbUSD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
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