OpenAI GPT-5 Deep Dive: What the New Reasoning Capabilities Mean for Developers

GPT-5 introduces 200K token context windows, 78% accuracy on AIME math competition problems, and 96.3% on HumanEval code benchmarks — nearly double GPT-4o performance. For enterprises, the $10/M token pricing (4x GPT-4o) requires careful ROI evaluation against specific use cases.