OpenAI has updated Codex pricing from per-message credits to token-based pricing (credits per million input, cached input, and output tokens) as of April 2, 2026. The new token-based rate card applies to new and existing ChatGPT Business customers and new Enterprise customers, while Plus, Pro, and existing Enterprise/Edu customers remain on the legacy per-message rate card until migrated. Detailed credit rates are provided for models including GPT-5.4, GPT-5.3-Codex, GPT-5.2-Codex, GPT-5.1-Codex-Max, and GPT-5.1-Codex-mini. Average costs are estimated at $100–$200 per developer per month, with variance based on model, fast mode usage, and task type.
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