ORPO Trainer & Vision LLMs support for SFTTrainer, KTO fixes

This release includes two new trainers: ORPO from KAIST and CPO
The release also includes Vision LLM such as Llava support for SFTTrainer, please see: https://github.com/huggingface/trl/blob/main/examples/scripts/vsft_llava.py for more details

ORPO Trainer

• ORPO trainer by @kashif in #1435
• [ORPO] use log1p for loss by @kashif in #1491

CPO Trainer

• Add CPOTrainer by @fe1ixxu in #1382
• Add use_cache=False in {ORPO,CPO}Trainer.concatenated_forward by @alvarobartt in #1478
• [ORPO] Update NLL loss to use input_ids instead by @alvarobartt in #1516

VLLMs support for SFTTrainer

You can now use SFTTrainer to fine-tune VLLMs such as Llava !
See: https://github.com/huggingface/trl/blob/main/examples/scripts/vsft_llava.py for more details

• Adds VLM Training support to SFTTrainer + VSFT script by @edbeeching in #1518

KTO Fixes

Many fixes were introduced for the KTOTrainer:

• Update KTO example to use better model and ChatML support by @lewtun in #1485
• [KTO] Use batching to speed up data processing by @lewtun in #1470
• Update KTO example with good dataset & chat format by @lewtun in #1481
• [KTO] fix interleaving, reporting, hanging bugs by @kawine in #1499
• [KTO] fix metric logging by @claralp in #1514

10x PPO !

• Speed up PPO with ZeRO-3 by 10x 🔥 by @lewtun in #1483

Other fixes

• set dev version by @younesbelkada in #1463
• Use the standard dataset for DPO CLI by @vwxyzjn in #1456
• [peft] Update test_reward_trainer.py to fix tests by @kashif in #1471
• Fix hyperparameters in KTO example by @lewtun in #1474
• docs: add missing Trainer classes and sort alphabetically by @anakin87 in #1479
• hackey update to ModelConfig to allow lora_target_modules="all-linear" by @galtay in #1488
• Ignore chat files by @lewtun in #1486
• Add DPO link in README by @qgallouedec in #1502
• Fix typo in how_to_train.md by @ftorres16 in #1503
• Fix DPO Unsloth example in Docs by @arnavgarg1 in #1494
• Correct ppo_epochs usage by @muhammed-shihebi in #1480
• Fix RichProgressCallback by @eggry in #1496
• Change the device index to device:index by @yuanwu2017 in #1490
• FIX: use kwargs for RMTrainer by @younesbelkada in #1515
• Allow streaming (datasets.IterableDataset) by @BramVanroy in #1468
• Allow pre-tokenized datasets in SFTTrainer by @BramVanroy in #1520
• [DOC] Add data description for sfttrainer doc by @BramVanroy in #1521
• Release: v0.8.2 by @younesbelkada in #1522

New Contributors

• @fe1ixxu made their first contribution in #1382
• @anakin87 made their first contribution in #1479
• @galtay made their first contribution in #1488
• @qgallouedec made their first contribution in #1502
• @ftorres16 made their first contribution in #1503
• @arnavgarg1 made their first contribution in #1494
• @muhammed-shihebi made their first contribution in #1480
• @eggry made their first contribution in #1496
• @claralp made their first contribution in #1514

Full Changelog: v0.8.1...v0.8.2