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mirrored listing x402 eip155:8453

Cheapest-model query: returns the lowest-cost AI models matching your constraints — min_co

Cheapest-model query: returns the lowest-cost AI models matching your constraints — min_context (tokens), vision/function_calling/reasoning (true), max_input_per_mtok (USD cap), limit (default 5). Add expected_input/expected_output token counts to rank by blended USD per request instead of input price; exclude_preview=true skips pre-release models. Answers 'what is the cheapest model that can do X?' across 2,000+ models and 70+ providers.

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5000 (raw units)
price
2
calls / 30d
2
unique payers
2026-08-28
updated

Provider

modelprices.xyz · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x63a20fa244d3E6a8902121E99704b7F857dc6EBB",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "expected_input": 2000,
          "expected_output": 500,
          "limit": 3,
          "min_context": 200000,
          "vision": true
        },
        "type": "http"
      },
      "output": {
        "example": {
          "generated_at": "2026-07-14T02:00:00.000Z",
          "match_count": 41,
          "models": [
            {
              "cache_read_per_mtok": 0.3,
              "confidence": "high",
              "first_observed_at": "2026-07-12T18:00:00.000Z",
              "id": "claude-sonnet-5",
              "input_per_mtok": 3,
              "output_per_mtok": 15,
              "provider": "anthropic",
              "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
              "usd_per_request": 0.0135
            }
          ],
          "ranked_by": "usd_per_request"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {
                "exclude_preview": {
                  "description": "Exclude preview/pre-release model versions",
                  "type": "boolean"
                },
                "expected_input": {
                  "description": "Expected input tokens per request — with expected_output, ranks by blended USD per request instead of input price",
                  "type": "number"
                },
                "expected_output": {
                  "description": "Expected output tokens per request",
                  "type": "number"
                },
                "function_calling": {
                  "type": "boolean"
                },
                "limit": {
                  "default": 5,
                  "maximum": 25,
                  "type": "integer"
                },
                "max_input_per_mtok": {
                  "description": "Max input price in USD per 1M tokens",
                  "type": "number"
                },
                "min_context": {
                  "description": "Minimum context window in tokens",
                  "type": "integer"
                },
                "reasoning": {
                  "type": "boolean"
                },
                "vision": {
                  "type": "boolean"
                }
              },
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  },
  "builder-code": {
    "info": {
      "a": "modelprices"
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "additionalProperties": false,
      "properties": {
        "a": {
          "description": "App builder code",
          "pattern": "^[a-z0-9_]{1,32}$",
          "type": "string"
        },
        "s": {
          "description": "Service builder codes",
          "items": {
            "pattern": "^[a-z0-9_]{1,32}$",
            "type": "string"
          },
          "type": "array"
        },
        "w": {
          "description": "Wallet builder code",
          "pattern": "^[a-z0-9_]{1,32}$",
          "type": "string"
        }
      },
      "type": "object"
    }
  }
}

Use it

curl

curl "https://modelprices.xyz/llm/cheapest"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://modelprices.xyz/llm/cheapest");
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.get("https://modelprices.xyz/llm/cheapest")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/10896.json, and this resource appears in /discovery/resources and /discovery/search.