Reproduction directions

Here are some minimal commands to tun to whole pipeline on the collected data.

make sure python >= 3.10, otherwise, you would meet the [issue]

1. First create the data path location.

mkdir -p .cache
mkdir -p .saved_models
export DATA_PATH=$PWD/.cache
export MODEL_PATH=$PWD/.saved_models

2. Then download the OA data.

cp /path/to/<oa.jsonl> $DATA_PATH

Change the <oa.jsonl> file used in the model_training/configs/config.yaml, model_training/configs/config_rl.yaml and reward/instructor/rank_datasets.py files.

• (TODO) add better parsing of the config files that is consistent for sft, rm and rl training.

SFT Training

3. Start with the SFT training.

cd model_training
# export shared modules
export PYTHONPATH=$PYTHONPATH:../../oasst-shared

python trainer_sft.py --configs defaults oa_dataset_only pythia --cache_dir $DATA_PATH --output_dir $MODEL_PATH/sft_model

# if you want to use wandb, add
--wandb_entity your_username/team_name

To change the model used, i.e. larger pythia version create a new config in model_training/configs/config.yaml or set the flag --model_name to EleutherAI/pythia-{size}-deduped. Larger models will probably need to also adjust the --learning_rate and --per_device_train_batch_size flags.

4. Get SFT trained model

# choose a specific checkpoint
export SFT_MODEL=$MODEL_PATH/sft_model/<checkpoint-X>

# or get latest checkpoint
export SFT_MODEL=$MODEL_PATH/sft_model/$(ls -t $MODEL_PATH/sft_model/ | head -n 1)

RM Training

5. Train the reward model

cd ../reward/instructor
python trainer.py configs/deberta-v3-base.yml --output_dir $MODEL_PATH/reward_model

6. Get RM trained model

# choose a specific checkpoint
export REWARD_MODEL=$MODEL_PATH/reward_model/<checkpoint-X>

# or get latest checkpoint
export REWARD_MODEL=$MODEL_PATH/reward_model/$(ls -t $MODEL_PATH/reward_model/ | head -n 1)

RL Training

7. Train the RL agent

cd ../../model_training
python trainer_rl.py --configs defaults_rlhf --cache_dir $DATA_PATH --rank_model $REWARD_MODEL --sft_model $SFT_MODEL --output_dir $MODEL_PATH/rl_model

Message and Token Format

See the MESSAGE_AND_TOKEN_FORMAT.md file for information about the pattern we are using.