OpenAI Devs September roundup: GPT-6.1 Sol, dots, Codex, Decisions API

Lists what changed in OpenAI's developer stack: GPT-6.1 Sol with a 95% cached-input discount, a Decisions API preview, Ultrafast mode up to 8x faster, and new Codex CLI commands. Useful for deciding what to adopt.

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• postGPT-6.1 Sol launches with near-Astra performance and cheaper caching

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• postGPT-6.1 Sol launches with near-Astra performance and cheaper cachingOpenAI Developers

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