GPT-4o (May 2024 release)
Closed
GPT-4o was announced on May 13, 2024, with text/image API access and a staged ChatGPT rollout. Its broader multimodal architecture did not make every audio, video or image-output feature publicly available at launch. This entry is the named May release, not a mutable API alias.
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Access
The announcement says developers could use text/vision in the API on May 13, while text/image capabilities began rolling out to free and Plus ChatGPT users. Other modalities and a new Voice Mode were staged for later access. Exact rollout completion and current historical-release availability remain unknown.