modelprices.xyz
x402Grade BLast checked 2 hours ago
GET https://modelprices.xyz/llm/cheapest/reasoning
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.
Price$0.01per model request · paid in USD on Base
Uptime100%
4/4 probes · 1411.5 ms
Score71Grade 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/reasoning"
# 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 10:31 | Valid 402 | 402 | 958 ms | $0.01 |
| 2026-10-11 06:15 | Valid 402 | 402 | 1580 ms | $0.01 |
| 2026-10-11 01:45 | Valid 402 | 402 | 1402 ms | $0.01 |
| 2026-10-10 21:30 | Valid 402 | 402 | 1421 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