GPT-5 Context window

https://github.com/openai/codex/blob/431c9299d495ef771288caf0dcf5952c585f7023/codex-rs/core/src/openai_model_info.rs#L80-L83

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Not a moan or a bug, but a question (and my assumption as to 'why'):

• the context window for GPT-5 in the file mentioned above is set to 200k tokens in the codex-cli. Why isn't the full 400k context window being used?
• my assumption is that it's being done as an attempt to mitigate overloading the inference servers - which I definitely can both accept and understand - can you confirm if that's the case, and if so - when will it change (rough timeline)?