Xclis.ai
Anthropic / OpenAI / Google
Claude averages 2.2% of official pricing, as low as 2.1% of official pricing; GPT averages 3.4% of official pricing, as low as 1.7% of official pricing. Usage is billed per 1M tokens with no monthly fee; prices use each model's lowest current complete public group. The minimum top-up is $1 and balances do not expire.