Original sourceInfoWorld
Summary
OpenAI updated Codex (based on GPT5.6), reducing the default input context window from 372k tokens to 272k tokens, triggering concerns in the developer community. A smaller context means Codex is more likely to forget earlier content during long coding sessions or large codebase scenarios, forcing…
Key points
- Developers and technical teams using Codex can proactively adjust workflows to avoid productivity losses or project delays caused by context limitations.
- The context window reduction directly affects the AI-assisted coding experience and agentic software development efficiency, a critical change developers must watch.
- Practically, developers must invest more effort in task decomposition and context management; large projects may need to switch to other tools or introduce retrieval mechanisms to compensate for model forgetting.
Editorial note
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