Tibo Sottiaux posted configuration steps for Codex users to set a 1M-token context window with the GPT-5.6 Sol model. The post states the change now works for ChatGPT accounts in addition to API keys. Sottiaux noted the default limit was tuned for performance and cost. Noam Brown replied that he does not recommend increasing the default context size. Other replies discussed autocompaction and tested actual token limits in separate tools.