Originally published on AI Tech Connect.
What changed on 24 April On 24 April 2026, OpenAI published the announcement at openai.com/index/introducing-gpt-5-5/ and made GPT-5.5 available to API developers. The company describes it as their "smartest and most intuitive" model — a step up from GPT-5.4 on reasoning, planning, and a specific cluster of high-value tasks: code debugging, online research, data analysis, and computer-use. The release comes in two flavours. The base GPT-5.5 is positioned as the standard capability upgrade for most API use cases. GPT-5.5 Pro is the higher-capability variant aimed at workloads that need the absolute ceiling — complex multi-step agents, advanced research pipelines, and tasks where quality is the dominant constraint over cost. Both are live in the API at launch. Alongside the model itself,…
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