Tech Apr 6, 2026 updated 7 min OpenAI Codex switched to per-token pricing: new rate card, $20 Business seat, and how it now diverges from GitHub Copilot On April 2 2026 OpenAI scrapped Codex's per-message credit model for per-token billing tied to API consumption. ChatGPT Business dropped to $20, a Codex-only seat appeared, and Copilot's premium-request model is no longer the reference. OpenAI Codex GitHub Copilot AI Pricing AI Coding