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OpenAI appears to be rolling out a mid-cycle model labeled GPT-5.5, with hints of its existence surfacing in SDK and Codex registry updates. Developers found gpt-5.5 marked “current” alongside other frontier and experimental model names in a recent v0.122.0 listing, raising questions about its purpose, stability and whether it represents an internal, public, or transitional release. The discovery underscores how SDK or registry changes can leak product direction, complicate compatibility and documentation, and prompt developers to await formal release notes and API guidance to understand intended use and migration paths.
SDK and registry listings are often the first public signals of product direction; a mid-cycle GPT-5.5 affects integration, compatibility and migration planning. Tech teams need to track model availability, stability and API guidance to avoid outages and manage upgrade paths.
Dossier last updated: 2026-05-13 09:51:43
当前 Free 版本的 Codex GPT-5.5 服务错误率飙升，以及所有版本 GPT-5.5 延迟升高
绝杀，OpenAI正式接管人类耳朵，首个GPT-5级推理音频模型来了
Introducing GPT-5.5
Developers updating Codex to v0.122.0 discovered a new model listing that includes gpt-5.5 (marked “current”) alongside other frontier and novelty entries such as oai-2.1, gpt-5.4, gpt-5.2-codex, and playful names like arcanine and glacier-alpha variants. The poster noted surprise and confusion about the presence and purposes of the additional models in the SDK listing. This matters because SDK or registry updates revealing model names and statuses can signal new or internal versions, pose compatibility and documentation questions for developers, and hint at product direction or experimentation by the platform. Developers and platform observers should watch for official release notes and API docs to clarify intended use and stability.