Tech Mar 6, 2026 10 min Back-to-back releases of OpenAI GPT-5.3/5.4 and Saguaro-driven inference speedups A summary of GPT-5.3 Instant’s hallucination reductions and safety regressions, GPT-5.4’s computer use, Tool Search, and 1M-token context, plus Saguaro’s 5× inference speedups. LLM OpenAI GPT Inference Optimization Speculative Decoding AI Safety Computer Use
