If you sell or buy cheaper AI model tokens, the headline price is only half the story.

A user may start with a simple question:

Why did this API key spend more than expected?

That question cannot be answered by a model price table alone. It needs a receipt for the actual request path.

At Tokens Forge, this is the product problem we keep running into while building lower-cost access to GPT, Claude, Gemini, and research workflows: cheap tokens create trust only when the usage trail is clear.