Model releaseLimited global significanceConfirmed confidence
OpenAI releases GPT-5.1
A maintenance update to GPT-5 that improves adherence to complex nested instructions and reduces hallucination on some tasks.
What happened
Event details
GPT-5.1 is a maintenance update to GPT-5, focused on better adherence to complex nested instructions and reduced hallucination on certain tasks. OpenAI released the closed-source model on November 12, 2025; the parameter count is undisclosed and it is an autoregressive Transformer. The primary source is OpenAI's official model release notes.
Assessment
Why it matters
Rated on the impact-v1 six-axis scale: technical 2/5, market 2/5, ecosystem 2/5, policy & social 1/5, scope 3/5, durability 2/5.
45/100Global significance score. Regional effects are recorded only when the evidence supports a meaningful difference.