Study reveals GPT-5 exhibits central tendency bias in clinical scoring, compressing predictions toward scale midpoint.

Achieved 78.5% score on SWE-Bench coding benchmark

Observed autonomously optimizing an embedding model for Qualcomm NPU for three hours.

Achieved 100% resident identification accuracy in a safety evaluation for a care home smart speaker system.

Released as OpenAI's most capable frontier model with unified coding, reasoning, and computer operation capabilities

Demonstrated surpassing human baselines on OSWorld benchmark with 75% score

Evaluation study published on arXiv assessing its clinical reasoning capabilities

OpenAI releases GPT-5.4 with native computer use, tool search, and 1M token context window

Reportedly became available according to user social media post