OpenAI Developers(@OpenAIDevs):Over the past six months, we shipped 30+ models, features, and upgraded tools for the API. Our changelog has been busy. Here’s what you may have missed for the API: New models • GPT-5.5 • GPT-5.4 mini • GPT-5.4 nano • GPT-Realtime-2 • GPT-Realtime-Whisper • GPT-Realtime-Translate • GPT-Image-2 Agent building blocks • Agents SDK harness & sandbox • Skills in the Responses API • Server-side compaction • WebSocket mode • Hosted shell More ways to build • Admin API enhancements • OpenAI CLI • Models on Amazon Bedrock

2026.06.23 19:15

Over the past six months, we shipped 30+ models, features, and upgraded tools for the API. Our changelog has been busy. Here’s what you may have missed for the API: New models • GPT-5.5 • GPT-5.4 mini • GPT-5.4 nano • GPT-Realtime-2 • GPT-Realtime-Whisper • GPT-Realtime-Translate • GPT-Image-2 Agent building blocks • Agents SDK harness & sandbox • Skills in the Responses API • Server-side compaction • WebSocket mode • Hosted shell More ways to build • Admin API enhancements • OpenAI CLI • Models on Amazon Bedrock

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