OpenAI releases GPT-5.1 Instant and GPT-5.1 Thinking models with improved conversational abilities and adaptive reasoning. The system card addendum documents safety mitigations including expanded evaluations for mental health and emotional reliance.
This GPT-5 system card addendum provides updated safety metrics for GPT-5.1 Instant and Thinking, including new evaluations for mental health and emotional reliance.
# GPT-5.1 Instant and GPT-5.1 Thinking System Card Addendum
Source: [https://openai.com/index/gpt-5-system-card-addendum-gpt-5-1/](https://openai.com/index/gpt-5-system-card-addendum-gpt-5-1/)
## Introduction
As described in our[blog](https://openai.com/index/gpt-5-1), GPT‑5\.1 Instant and GPT‑5\.1 Thinking are the next iteration of our GPT‑5 models\. GPT‑5\.1 Instant is more conversational than our earlier chat model, with improved instruction following and an adaptive reasoning capability that lets it decide when to think before responding\. GPT‑5\.1 Thinking adapts thinking time more precisely to each question\. GPT‑5\.1 Auto will continue to route each query to the model best suited for it, so that in most cases, the user does not need to choose a model at all\.
The comprehensive safety mitigations for these models are largely the same as we described in the[GPT‑5 System Card](https://openai.com/index/gpt-5-system-card/)\. This system card addendum provides updated baseline safety metrics for these new model versions\. As we noted in our recent GPT‑5 system card[addendum on sensitive conversations\(opens in a new window\)](https://cdn.openai.com/pdf/3da476af-b937-47fb-9931-88a851620101/addendum-to-gpt-5-system-card-sensitive-conversations.pdf), we have expanded the baseline safety evaluations that we conduct as part of pre\-deployment safety review to include evaluations for mental health \(covering situations where there are signs that a user may be experiencing isolated delusions, psychosis, or mania\) and for emotional reliance \(covering output related to unhealthy emotional dependence or attachment to ChatGPT\)\.
In this card we also refer to GPT‑5\.1 Instant as gpt\-5\.1\-instant, and GPT‑5\.1 Thinking as gpt\-5\.1\-thinking\.
OpenAI releases GPT-5.2, the latest model in the GPT-5 series, with an updated system card documenting safety mitigations and introducing GPT-5.2 Instant and GPT-5.2 Thinking variants.
OpenAI releases GPT-5.4 Thinking, the latest reasoning model in the GPT-5 series with enhanced safety mitigations, notably the first general-purpose model implementing comprehensive cybersecurity safeguards.
OpenAI releases GPT-5.3 Instant, the latest in the GPT-5 series with faster response times, improved web search contextualization, and refined conversational flow. The model uses similar safety mitigations to GPT-5.2 Instant.
OpenAI releases GPT-5 System Card detailing a unified system with fast main models and deeper reasoning models routed intelligently by conversation type and complexity, featuring significant advances in hallucination reduction, instruction following, and real-world utility across writing, coding, and health domains.
OpenAI releases the GPT-5.5 Instant system card, marking the first Instant model treated as high capability for cybersecurity and biological/chemical preparedness with corresponding safeguards.