OpenAI details an in-house real-time access & billing engine
Its 'Beyond rate limits' engineering post describes a home-grown engine fusing rate limits, real-time usage tracking, and prepaid credit balances — the spend-control layer most companies buy — alongside a dedicated Financial Engineering hiring push.
OpenAI’s Beyond rate limits: scaling access to Codex and Sora post discloses a built-in-house real-time access engine that unifies rate limits, usage metering, and credit balances into a single model, letting users spend down a prepaid balance to continue past hard limits. Combined with open “Financial Engineering” and pricing roles, it signals OpenAI is building — not buying — the core of its monetization stack. Logged from the engineering blog + public job postings via the wiki-signals pipeline.
Re-capture of the ChatGPT Business/Enterprise comparison surface. Headline prices unchanged (Business $25/seat monthly, $20/seat annual 2+ users; Enterprise custom). API token rates corroborated unchanged via developer docs (GPT-5.5 $5/$30, GPT-5.4 $2.50/$15, mini $0.75/$4.50, nano $0.20/$1.25). Consumer ChatGPT page remained Cloudflare bot-protected.