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Annalist AI Model Pricing
x402
Annalist AI Model Pricing is a paid API for AI agents from api.annalist.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-21).
Returns current and historical pricing per million tokens (input, output, cache, batch) for ~4,000 AI models across providers, with filtering and sorting options
Price / call$0.01
Success—
StatusUnknown
How this service works
AI model prices per million tokens (input, output, cache, batch) with context window, for about 4,000 models across providers. With model=: its price history and the same model on other providers. Without: a list filtered by provider, mode, min_context and max_input price, sorted by input, output or context. History from January 2026. Source: LiteLLM's open price file (MIT). Signed.
Output
A JSON response (cryptographically signed) containing per-model pricing data: input, output, cache, and batch costs in USD per million tokens, context window size, and provider info. When a model is specified, also includes price history and cross-provider listings. Without a model, returns a filtered and sorted list of models matching the query parameters.
Example use cases
Find cheapest model for a budget
“I need to pick an AI model for my app but I can't spend more than $0.50 per million input tokens — show me all chat models under that price, sorted by input cost.”
Track price drops for a specific model
“Has the price of Claude 3.5 Sonnet changed since January 2026? Show me its full price history.”
Compare same model across providers
“I want to use Llama 3.1 70B — which providers offer it and what are their prices per million tokens for input and output?”
Technical details
Endpoint
GEThttps://api.annalist.dev/v1/ai/prices?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need accurate, up-to-date, cryptographically signed AI model pricing data across a large number of providers (~4,000 models). Prefer it over scraping provider websites or using stale cached data. Ideal for cost optimization agents, model selection workflows, budget-aware routing, or monitoring price changes over time. The LiteLLM-sourced data and broad model coverage make it the most comprehensive single source for cross-provider LLM pricing.
Side effects
- Unknown model name returns empty result or error
- Provider name mismatch returns no results
- Invalid sort enum value returns 400 error
- max_input or min_context with non-numeric string causes parse error
- Rate limiting or payment failure via x402 returns 402 Payment Required
- History only available from January 2026; earlier requests return no historical data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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