OpenAI Codex pricing change detected: floor $0 → $8/mo

Detected automatically from the vendor pricing page. ChatGPT Work and Codex pricing includes Free ($0/month), Go ($8/month), Plus ($20/month), Pro (from $100/month), Business ($20/user/month billed annually or $25/user/month billed monthly), Enterprise (contact sales), and an API Key option which is usage-based. Pending human verification (needs_review).