> ## Documentation Index
> Fetch the complete documentation index at: https://documentation.dumgum.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Model Versions

Each chat model carries a version. Name the one you want on every request, and your project stays on it until you say otherwise.

<Check>
  **New projects: start on 2.1.** Already running 2.0? Nothing to do, and no deadline.
</Check>

## Version 2.0

`chat-2-smart` and `chat-2-pro`. Released 12 December 2025.

* [SoulEngine](/content-creation/soulengine)
* [Core Guardian](/content-creation/core-guardian)
* [Vision Link](/content-creation/vision-link)
* [Smart Share](/content-creation/autonomous-photo-sharing)
* [Meeting Policy](/best-practices/control-meeting-requests-with-meetingpolicy)
* [Engage](/best-practices/automate-engagement-with-engage)
* [Fictional Disclosure](/content-creation/fictional-disclosure)
* [Platform Information](/content-creation/platform-information)
* [Memory Webhook](/content-creation/memory-webhook)
* [User Suggestions](/content-creation/suggestions)
* [Multi-message replies](/best-practices/understanding-multiple-messages-per-reply)
* [All supported languages](/content-creation/supported-languages)

## Version 2.1

`chat-2.1-smart` and `chat-2.1-pro`. Released 6 August 2026. Latest version.

Everything in 2.0, plus:

* [**Photo and video sharing modes**](/best-practices/control-sharing-and-sexual-intensity): `NORMAL` and `EAGER` now differ on explicit content.
  Upgrading: on `EAGER` nothing changes. On `NORMAL`, if you rely on nude content being shared, switch to `EAGER` first.
* [**First reply follows the conversation**](/best-practices/control-sharing-and-sexual-intensity#the-first-reply): she answers in the tone the User set, instead of opening with small talk.
  Upgrading: a flirty or sexual opener now gets answered in kind, as far as `sexualDrive` allows.

## Switching version

Set `replyParameters.chatModel` to `chat-2.1-smart` or `chat-2.1-pro`. Nothing to migrate: the next request runs on the version you name. Smart or Pro is a separate choice, covered in [Choose Your Model](/getting-started/choose-your-model).

<Note>
  Not sure which version you are on? It is whatever `chatModel` your integration sends, and you can see it on any answer in the [Response Explorer](https://dash.dumgum.ai/content-creation/response-explorer).
</Note>

Version 2.0 has no `.0` in its model id. The legacy `dating-smart-1` and `dating-pro-1` models are still served, without Vision Link or Smart Share. Every release is listed in the [changelog](/changelog).