Pricing

Two providers both advertise $0.50 per million output tokens, why is that comparison still dishonest?

When does inflating the system prompt actually lower cost per call?

Diagnose the reasoning error in 'a bigger tokenizer vocabulary always cuts our token bill'

'Prompt caching cuts our bill by 90 percent across the board', what's overclaimed?

Match each part of an OpenAI tool-call round-trip to the usage field that bills it

Describe why structured-output mode quietly raises the per-call token bill

Estimate the token tax a single tool round-trip adds compared with an inline answer

Why can a single high-res image cost more input tokens than a multi-paragraph prompt?

Why can a 50-token reply from a reasoning model still bill you for thousands of tokens?

TPM and RPM each throttle a different axis, which one caps which?

Why do hosted LLM APIs charge separate per-million rates for input and output tokens?

Spot the errors in this explanation of input vs output pricing

Why are output tokens typically 3-5× more expensive than input tokens?