OpenAI GPT-5.5 Complete Developer Guide (April 2026)

OpenAI released GPT-5.5 on April 23, 2026, calling it its smartest and most intuitive model yet. This guide covers what changed, who should upgrade, API access, pricing, and the new agentic capabilities that define the release.

Continue reading the full article on WowHow →

Originally published at https://wowhow.cloud/blogs/openai-gpt-5-5-developer-guide-april-2026

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