Everything on Model Efficiency

GPT 5.5 exhibits extended "thinking" phases, which can result in long processing times for simple tasks, making it less efficient for basic "vibe coding" compared to complex problem-solving.

Impact: Users should match model complexity to problem difficulty; deploying GPT 5.5 for simple tasks may incur unnecessary latency and costs without proportional value gains.

— from GPT 5.5: Advanced Autonomy, Tech Debt Resolution, and High-Cost Intelligence · How I AI· Apr 23, 2026