add support for SPPO

docs/config.qmd

@@ -138,7 +138,7 @@ test_datasets:
     data_files:
       - /workspace/data/eval.jsonl
 
-# use RL training: 'dpo', 'ipo', 'kto_pair'
+# use RL training: 'dpo', 'ipo', 'kto_pair', 'orpo', 'sppo_hard'
 rl:
 
 # Saves the desired chat template to the tokenizer_config.json for easier inferencing

requirements.txt

@@ -39,6 +39,6 @@ s3fs
 gcsfs
 # adlfs
 
-trl==0.8.5
+trl @ git+https://github.com/huggingface/trl.git@75de236c09bd5846f79c24d9bf371481b0b7582c
 zstandard==0.22.0
 fastcore

src/axolotl/core/trainer_builder.py

@@ -30,7 +30,7 @@
 )
 from transformers.trainer_utils import seed_worker
 from transformers.utils import is_sagemaker_mp_enabled
-from trl import DPOTrainer, ORPOConfig, ORPOTrainer
+from trl import DPOConfig, DPOTrainer, ORPOConfig, ORPOTrainer
 from trl.trainer.utils import pad_to_length
 
 from axolotl.loraplus import create_loraplus_optimizer
@@ -1526,6 +1526,9 @@ def build_training_arguments(self, total_num_steps):
         if self.cfg.rl == "orpo":
             training_args_cls = ORPOConfig
             training_args_kwargs["dataset_num_proc"] = self.cfg.dataset_processes
+        elif self.cfg.rl in ["dpo", "ipo", "kto_pair", "sppo_hard"]:
+            training_args_cls = DPOConfig
+            training_args_kwargs["dataset_num_proc"] = self.cfg.dataset_processes
 
         training_args = training_args_cls(
             per_device_train_batch_size=self.cfg.micro_batch_size,
@@ -1552,6 +1555,8 @@ def build(self, total_num_steps):
                 dpo_trainer_kwargs["label_smoothing"] = self.cfg.dpo_label_smoothing
         elif self.cfg.rl == "kto_pair":
             dpo_trainer_kwargs["loss_type"] = "kto_pair"
+        elif self.cfg.rl == "sppo_hard":
+            dpo_trainer_kwargs["loss_type"] = "sppo_hard"
         if self.eval_dataset:
             dpo_trainer_kwargs["eval_dataset"] = self.eval_dataset
         if self.cfg.adapter and self.peft_config:
@@ -1560,7 +1565,7 @@ def build(self, total_num_steps):
             dpo_trainer_kwargs[
                 "precompute_ref_log_probs"
             ] = self.cfg.precompute_ref_log_probs
-        if self.cfg.rl in ["dpo", "ipo", "kto_pair"]:
+        if self.cfg.rl in ["dpo", "ipo", "kto_pair", "sppo_hard"]:
             trainer_cls = AxolotlDPOTrainer
             dpo_trainer_kwargs["beta"] = self.cfg.dpo_beta or 0.1
             trainer_cls_args = [self.model, self.model_ref]

src/axolotl/prompt_strategies/dpo/mistral.py

@@ -0,0 +1,30 @@
+"""
+DPO strategies for mistral instruct
+"""
+
+
+def prompt_pairs(cfg):  # pylint: disable=possibly-unused-variable,unused-argument
+    def transform_fn(sample):
+        sample["prompt"] = f"[INST]{sample['prompt']}[/INST]"
+        sample["chosen"] = f"{sample['chosen']}"
+        sample["rejected"] = f"{sample['rejected']}"
+        return sample
+
+    return transform_fn
+
+
+def argilla_chat(
+    cfg,
+    **kwargs,
+):  # pylint: disable=possibly-unused-variable,unused-argument
+    """
+    for argilla/dpo-mix-7k conversations
+    """
+
+    def transform_fn(sample):
+        sample["prompt"] = f"[INST] {sample['chosen'][0]['content']} [/INST]"
+        sample["chosen"] = f"{sample['chosen'][1]['content']}</s>"
+        sample["rejected"] = f"{sample['rejected'][1]['content']}</s>"
+        return sample
+
+    return transform_fn

src/axolotl/utils/config/models/input/v0_4_1/__init__.py

@@ -133,6 +133,7 @@ class RLType(str, Enum):
     ipo = "ipo"  # pylint: disable=invalid-name
     kto_pair = "kto_pair"  # pylint: disable=invalid-name
     orpo = "orpo"  # pylint: disable=invalid-name
+    sppo_hard = "sppo_hard"  # pylint: disable=invalid-name
 
 
 class ChatTemplate(str, Enum):
@@ -574,6 +575,7 @@ class Config:
     neftune_noise_alpha: Optional[float] = None
 
     orpo_alpha: Optional[float] = None
+    dpo_beta: Optional[float] = None
 
     max_memory: Optional[
         Dict[Union[int, Literal["cpu", "disk"]], Union[int, str]]

src/axolotl/utils/models.py

@@ -789,7 +789,11 @@ def load_model(
     if not reference_model or cfg.lora_model_dir:
         # if we're not loading the reference model, then we're loading the model for training
         # then the dpo trainer doesn't want the peft model loaded over it, it just wants the lora/peft config
-        if cfg.adapter and cfg.rl in ["dpo", "ipo", "kto_pair"] and not cfg.merge_lora:
+        if (
+            cfg.adapter
+            and cfg.rl in ["dpo", "ipo", "kto_pair", "sppo_hard"]
+            and not cfg.merge_lora
+        ):
             _, lora_config = load_lora(model, cfg, inference=False, config_only=True)
         else:
             model, lora_config = load_adapter(model, cfg, cfg.adapter)

src/axolotl/utils/trainer.py

@@ -438,7 +438,7 @@ def prepare_optim_env(cfg):
 
 
 def setup_trainer(cfg, train_dataset, eval_dataset, model, tokenizer, total_num_steps):
-    if cfg.rl in ["dpo", "ipo", "kto_pair", "orpo"]:
+    if cfg.rl in ["dpo", "ipo", "kto_pair", "orpo", "sppo_hard"]:
         trainer_builder = HFRLTrainerBuilder(cfg, model[0], tokenizer)
         trainer_builder.model_ref = model[1]
         trainer_builder.peft_config = model[2]