What API List Prices Don't Tell You About AI Subscriptions — OpenAI and Anthropic Usage Limits and Pricing Strategies, Seen by a Developer Who Runs AI All Day

With Codex I have to keep watching for the usage limit. With Claude Opus 5.5 I can leave it running. I check this experience against SemiAnalysis's data, and look at it from two sides: how developers and companies should choose, and the pricing strategies of OpenAI and Anthropic.