| # RLHF (Beta) | |
| ### Overview | |
| Reinforcement Learning from Human Feedback is a method whereby a language model is optimized from data using human | |
| feedback. Various methods include, but not limited to: | |
| - Proximal Policy Optimization (PPO) (not yet supported in axolotl) | |
| - Direct Preference Optimization (DPO) | |
| - Identity Preference Optimization (IPO) | |
| ### RLHF using Axolotl | |
| [!IMPORTANT] | |
| This is a BETA feature and many features are not fully implemented. You are encouraged to open new PRs to improve the integration and functionality. | |
| The various RL training methods are implemented in trl and wrapped via axolotl. Below are various examples with how you can use various preference datasets to train models that use ChatML | |
| #### DPO | |
| ```yaml | |
| rl: true | |
| datasets: | |
| - path: Intel/orca_dpo_pairs | |
| split: train | |
| type: intel_apply_chatml | |
| - path: argilla/ultrafeedback-binarized-preferences | |
| split: train | |
| type: argilla_apply_chatml | |
| ``` | |
| #### IPO | |
| ```yaml | |
| rl: ipo | |
| ``` | |
| #### Trl autounwrap for peft | |
| Trl supports autounwrapping peft models, so that a ref model does not need to be additionally loaded, leading to less VRAM needed. This is on by default. To turn it off, pass the following config. | |
| ```yaml | |
| # load ref model when adapter training. | |
| rl_adapter_ref_model: true | |
| ``` | |