Deep Dive: GPT-5.4 Complete Guide u2014 Every Feature, Benchmark, and Use Case in 2026
“`html ⚡ TL;DR — Key Takeaways What it is: GPT-5.4 is OpenAI’s March 2026 production-default model in the GPT-5 family, offering four variants (nano, mini, standard, pro) with a 512K context window, 74.9% SWE-bench Verified score, and automatic prompt caching at 25% of standard input rates. Who it’s for: Engineering…
