Canonical event

OpenAI launches GPT-4 Turbo and multimodal developer APIs

OpenAI launched GPT-4 Turbo preview with 128K context, improved function calling, vision, DALL-E 3 and TTS APIs.

Artifacts

OpenAI DevDay model and assistant platform release
evidenced_by · developer_platform_release

Signals

Long-context, multimodal and tool-capable model interfaces expanded across multiple providers and developer platforms while some frontier variants remained preview or unavailable.
supported inference

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