OpenAI Unleashes GPT 5.5: What's New and Better?

Summary

OpenAI has officially launched GPT 5.5, their latest frontier model available through Codex and ChatGPT Pro. Early access users report significant improvements, particularly in agentic coding, computer use, and knowledge work. Key upgrades include enhanced reasoning, better understanding of system context, and more concise explanations, addressing previous weaknesses in areas like personality and communication style. While GPT 5.5 matches GPT 5.4's token latency, it achieves higher intelligence with greater token efficiency, making it more cost-effective for many use cases despite a higher per-token price. Benchmarks show GPT 5.5 outperforming previous versions and competitors like Claude Opus 4.7 in areas such as terminal bench and web browsing. The Pro version is specifically designed for complex research and scientific tasks. OpenAI emphasizes iterative deployment and broad access, contrasting with other approaches in the AI space.