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modelprices.xyz cheapest function-calling
https://modelprices.xyz/llm/cheapest/function-calling
answers 402
Cheapest tool-use LLM leaderboard: the 50 lowest-cost AI models that support function calling / tool use, ranked by token price across 70+ providers. Input, output and cache USD per 1M tokens with context window and modality flags joined in. The cheapest way to pick a model for an agent loop that needs reliable structured tool calls. 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
- 171 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-09-06T01:21:02.103Z (32d ago)
- Category
- finance-crypto
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fmodelprices.xyz%2Fllm%2Fcheapest%2Ffunction-calling"