GPT-5.5, codenamed Spud, arrived April 23, 2026 with a focus on agentic tasks. We break down what changed in OpenAI's first full retraining since GPT-4.5.
GPT-5.5, codenamed Spud, arrived April 23, 2026 with a focus on agentic tasks. We break down what changed in OpenAI's first full retraining since GPT-4.5.