the402 endpoint detail

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modelprices.xyz cheapest 128k-context

https://modelprices.xyz/llm/cheapest/128k-context

answers 402

Cheapest 128k-context LLM leaderboard: the 50 lowest-cost AI models with a 128,000-token context window or larger, ranked by inference cost per token across 70+ providers. Input, output and cache USD per 1M tokens with exact context window and capability flags joined in. The standard long-document tier, priced side-by-side. Refreshed hourly.

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.01
Network
base
Pay to
0x63a20fa244d3E6a8902121E99704b7F857dc6EBB
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
160 ms
Payment options
1 usable of 1
Last checked
2026-09-06T01:21:02.347Z (32d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fmodelprices.xyz%2Fllm%2Fcheapest%2F128k-context"