GPT-5.4 mini and nano launched by OpenAI, Mistral joins the NVIDIA Nemotron Coalition, Perplexity Comet Enterprise available
March 17, 2026: OpenAI launches GPT-5.4 mini and nano with benchmarks close to the full model, Mistral and Perplexity join the NVIDIA Nemotron Coalition at GTC 2026, and Perplexity opens Comet to enterprise teams with MDM governance.