AI Inference · x402 · early usage

Cheapest million-token-context LLM leaderboard: every AI model with a 1,000,000-token c…

by modelprices.xyz · discovered, not yet claimed by its owner · updated 2026-10-08

30d calls2

30d payers2

MethodGET

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Cheapest million-token-context LLM leaderboard: every AI model with a 1,000,000-token context window or larger, ranked by inference cost per token — Gemini 3 Pro, Gemini 3 Flash, Llama 4 Scout, GPT-5 long-context tiers and more. Input, output and cache USD per 1M tokens with exact context window and max output joined in. Answers 'what is the cheapest model that fits my whole corpus?' Refreshed hourly.

Tags: bazaar · builder-code

Call contract

Method: GET
Input: query parameters
Output: json
Last paid call: 2026-10-08

Input example from Bazaar metadata

{}

Output example

{
  "board": "Cheapest 1M+ context 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"
    }
  ]
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/40637.json for the price and payment options.
Pay. Call GET https://modelprices.xyz/llm/cheapest/million-token-context. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.01 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 2 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.01	0x63a20fa244d3E6a8902121E99704b7F857dc6EBB	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x63a20fa244d3E6a8902121E99704b7F857dc6EBB",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {},
  "type": "string"
}

Examples

curl

curl -X GET 'https://modelprices.xyz/llm/cheapest/million-token-context'
# -> 402 Payment Required; read PAYMENT-REQUIRED
# retry the identical request with PAYMENT-SIGNATURE

JavaScript

const res = await fetch("https://modelprices.xyz/llm/cheapest/million-token-context", {
  "method": "GET"
});
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.request("GET", "https://modelprices.xyz/llm/cheapest/million-token-context")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: modelprices.xyz
Endpoint: https://modelprices.xyz/llm/cheapest/million-token-context
Machine-readable: /resources/40637.json