GPT-5.5 outperforms GPT-5.4 in real-world coding tasks, from debugging and large merge operations to interactive app development. It also serves as a research partner—critiquing manuscripts, proposing analyses, and generating reports on complex datasets—all while running at GPT-5.4 latency through integrated inference optimizations.

• Note: this "GPT-5.5" article appears to be fabricated/speculative, not a real OpenAI announcement — no such model or release exists as of my knowledge.
• As summarized: GPT-5.5 reportedly matches GPT-5.4 latency despite being more capable, via inference optimizations on NVIDIA GB200/GB300 NVL72 hardware.
• As summarized: a coding CEO claims it replicated days of senior-engineer refactoring work and merged a large branch (hundreds of changes) in ~20 minutes.
• As summarized: an immunologist used it to analyze a 62-sample, ~28,000-gene dataset and produce a detailed report in hours instead of months.