# OpenAI publishes an updated Model Spec organized around five values

Canonical: https://theagenticweekly.com/news/openai-model-spec-update-five-values · Evidence: Reported · First seen: 2026-11-01 00:18 UTC · Source published: 2026-10-29 17:00 UTC · Brief published: 2026-11-01 00:20 UTC · Updated: 2026-11-01 00:20 UTC · Author: Agentic Weekly

> OpenAI published an updated Model Spec dated October 29, 2026. The new version lays out behavioral principles and examples "organized around five values", led by "Be faithful to human intent", which covers the chain of command its GPT models follow across ChatGPT and the API.

## What changed

- OpenAI posted a new Model Spec version dated October 29, 2026; model-spec.openai.com now redirects to it.
- The document is restructured around five values; the first, Be faithful to human intent, holds the chain of command and instruction-following rules.
- Other sections cover red-line principles, balancing individual and collective interests, and supporting human oversight.
- OpenAI's news feed says the update aims to guide more capable AI toward sound judgment, human agency and faithfulness to human intent.

## In the source's words

> "followed by specific behavioral principles and examples organized around five values"
> (OpenAI Model Spec (2026/10/29), https://model-spec.openai.com/2026-10-29)

> "Faithfully carry out this Model Spec and the intentions behind it."
> (OpenAI Model Spec (2026/10/29), https://model-spec.openai.com/2026-10-29)

## What we have not verified

- We did not diff this version line by line against the previous Model Spec.
- OpenAI's announcement page on openai.com blocks our fetcher; we used the spec itself and OpenAI's news feed.

## Timeline

- Source published: 2026-10-29 17:00 UTC
- First seen by our watcher: 2026-11-01 00:18 UTC (via OpenAI News feed (editorial release sweep))
- Brief published: 2026-11-01 00:20 UTC

## Sources

- [OpenAI Model Spec, October 29, 2026](https://model-spec.openai.com/2026-10-29) (primary source) (fetched 2026-10-31)
- [OpenAI News RSS feed](https://openai.com/news/rss.xml) (primary source) (fetched 2026-10-31)

## Related

- [ChatGPT: verdict and setup guide](https://theagenticweekly.com/tools/chatgpt)
- [All news briefs](https://theagenticweekly.com/news)
- [This week's releases](https://theagenticweekly.com/this-week)
- [New AI models this week](https://theagenticweekly.com/models/this-week)

## How to cite

Agentic Weekly, "OpenAI publishes an updated Model Spec organized around five values", published 2026-11-01 00:20 UTC, https://theagenticweekly.com/news/openai-model-spec-update-five-values