---
title: "Changes to Create training session"
method: POST
path: "/rl/training-sessions"
---

# Changes to Create training session

`POST /rl/training-sessions`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 8 of 15 revisions.

- **2026-08-31** `f4885bc38424` — 1 info
- **2026-08-21** `3ad4ab328948` — 1 info
- **2026-08-19** `1fab430e87d6` — 5 info
- **2026-08-15** `468edbdc879c` — 2 info
- **2026-08-08** `f26a23fab8e0` — 3 info
- **2026-08-04** `ebd4756a41e4` — 4 info
- **2026-07-31** `9ccc57e5e4b9` — 1 breaking, 2 warning
- **2026-07-26** `0c4fdad77435` — 3 breaking, 2 warning, 10 info

## Changes

- **2026-08-31** `f4885bc38424` — 1 info
  - added the required property `policy_state` to the response with the `200` status
- **2026-08-21** `3ad4ab328948` — 1 info
  - added the new optional request property `load_optimizer`
- **2026-08-19** `1fab430e87d6` — 5 info
  - added the optional property `inference_checkpoints/items/registration/adapter_object_id` to the response with the `200` status
  - added the optional property `inference_checkpoints/items/registration/adapter_object_revision_id` to the response with the `200` status
  - added the optional property `inference_checkpoints/items/registration/model_object_id` to the response with the `200` status
  - added the optional property `inference_checkpoints/items/registration/model_object_revision_id` to the response with the `200` status
  - added the optional property `training_checkpoints/items/registration` to the response with the `200` status
- **2026-08-15** `468edbdc879c` — 2 info
  - added the new optional request property `lora_config/train_unembed`
  - added the optional property `lora_config/train_unembed` to the response with the `200` status
- **2026-08-08** `f26a23fab8e0` — 3 info
  - added the new optional request property `lora_config/seed`
  - added the optional property `lora_config/seed` to the response with the `200` status
  - added the required property `base_model` to the response with the `200` status
- **2026-08-04** `ebd4756a41e4` — 4 info
  - added the new optional request property `display_name`
  - added the new optional request property `metadata`
  - added the optional property `display_name` to the response with the `200` status
  - added the required property `metadata` to the response with the `200` status
- **2026-07-31** `9ccc57e5e4b9` — 1 breaking, 2 warning
  - the response property `lora_config` became optional for the status `200`
  - removed the request property `lora_config/enable`
  - removed the optional property `lora_config/enable` from the response with the `200` status
- **2026-07-26** `0c4fdad77435` — 3 breaking, 2 warning, 10 info
  - the `lora_config/alpha` response's property type/format changed from `integer`/`int64` to `integer`/`` for status `200`
  - the `lora_config/dropout` response's property type/format changed from `number`/`float` to `number`/`` for status `200`
  - the `lora_config/rank` response's property type/format changed from `integer`/`int64` to `integer`/`` for status `200`
  - removed the request property `optimizer_config`
  - removed the optional property `optimizer_config` from the response with the `200` status
  - the `alpha` request property default value changed from `16` to `64`
  - the `dropout` request property default value changed from `0.05` to `0.0`
  - the `rank` request property default value changed from `8` to `32`
  - the `lora_config/alpha` request property type/format was generalized from `integer`/`int64` to `integer`/``
  - the `lora_config/dropout` request property type/format was generalized from `number`/`float` to `number`/``
  - the `lora_config/rank` request property type/format was generalized from `integer`/`int64` to `integer`/``
  - the `alpha` response's property default value changed from `16` to `64` for the status `200`
  - the `dropout` response's property default value changed from `0.05` to `0.0` for the status `200`
  - the `rank` response's property default value changed from `8` to `32` for the status `200`
  - added the required property `created_by` to the response with the `200` status

---

[Operation](https://skmtc.dev/together/apis/together-apis/docs/rl/training-sessions/post.md) · [API](https://skmtc.dev/together/apis/together-apis.md) · [Page](https://skmtc.dev/together/apis/together-apis/changes/rl/training-sessions/post)