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The PEP model and release notes

Updated Oct 16, 2026 · Applies to Web, iPhone, and Android · All plans

PEP is the world's first AI model built for peptide research, and it writes the answers you get in ChatPEP. Each new release of PEP is announced in ChatPEP News, with release notes that say what changed.

What PEP does for you

PEP answers from the published research on peptides, cites the sources it draws on, and says how strong the evidence is, including when the human data is thin. See How to read an answer.

Find the release notes

  1. Go to ChatPEP News.
  2. Select Releases above the list of posts.
  3. The newest release is first.

Each release post describes what is new, such as compounds now covered in depth or a new capability. A shipped feature, such as the tracker or the iPhone app, is announced the same way as a Product update.

Release and product update emails

When a release or a product update is published, ChatPEP emails it to everyone with an account. Every one of these emails has an unsubscribe link at the bottom, and one click there stops all marketing email. To get them again, turn on Marketing emails in Settings, under Notifications. See Marketing emails.

Do I need to update anything?

No. Every chat uses the current release as soon as it ships, on the web, on iPhone, and on Android, with nothing to install. There is no setting to choose an earlier release.

Plans

What each plan includes, such as how many messages you can send and how much research an answer can review, is listed in Compare plans.

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