113d275bd9
* qwen docs + new config * docss lint * simplify comments * read me * lint comments * Update docs/multimodal.qmd * Update docs/multimodal.qmd * Update examples/qwen3.5/9b-fft-vision.yaml * chore: fix link and incorrect points --------- Co-authored-by: NanoCode012 <kevinvong@rocketmail.com> Co-authored-by: NanoCode012 <nano@axolotl.ai>
75 lines
3.8 KiB
Markdown
75 lines
3.8 KiB
Markdown
# Finetune Qwen3.5 with Axolotl
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[Qwen3.5](https://huggingface.co/collections/Qwen/qwen35) is a hybrid architecture model series combining Gated DeltaNet linear attention with standard Transformer attention. All Qwen3.5 models are early-fusion vision-language models: dense variants use `Qwen3_5ForConditionalGeneration` and MoE variants use `Qwen3_5MoeForConditionalGeneration`.
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Vision and text tokens are processed through the same transformer stack. The configs below train on text-only data unless noted otherwise. See `9b-lora-vision.yaml` for a multimodal example.
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Available configs:
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| Config | Model | Type | Peak VRAM |
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| `27b-qlora.yaml` | Qwen3.5-27B | Dense VLM, text-only QLoRA | ~47 GiB |
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| `27b-fft.yaml` | Qwen3.5-27B | Dense VLM, text-only FFT (vision frozen) | ~53 GiB |
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| `35b-a3b-moe-qlora.yaml` | Qwen3.5-35B-A3B | MoE, text-only QLoRA | — |
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| `122b-a10b-moe-qlora.yaml` | Qwen3.5-122B-A10B | MoE, text-only QLoRA | — |
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| `9b-lora-vision.yaml` | Qwen3.5-9B | Vision+text LoRA, single GPU | — |
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| `9b-fft-vision.yaml` | Qwen3.5-9B | Vision+text FFT, single GPU | ~61 GiB |
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## Getting started
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1. Install Axolotl following the [installation guide](https://docs.axolotl.ai/docs/installation.html).
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2. Install [Cut Cross Entropy](https://docs.axolotl.ai/docs/custom_integrations.html#cut-cross-entropy) to reduce training VRAM usage.
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3. Install FLA for sample packing support with the Gated DeltaNet linear attention layers:
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```bash
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pip3 uninstall -y causal-conv1d && pip3 install flash-linear-attention==0.4.1
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```
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> FLA is required when `sample_packing: true`. Without it, training raises a `RuntimeError` on packed sequences. Vision configs use `sample_packing: false` so FLA is optional there.
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4. Run a finetuning example:
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```bash
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# Dense 27B text-only (QLoRA, ~47 GiB VRAM with sample packing)
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axolotl train examples/qwen3.5/27b-qlora.yaml
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# Dense 27B text-only FFT with vision encoder frozen (~53 GiB, single 80 GiB GPU)
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axolotl train examples/qwen3.5/27b-fft.yaml
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# MoE 35B-A3B text-only (QLoRA)
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axolotl train examples/qwen3.5/35b-a3b-moe-qlora.yaml
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# MoE 122B-A10B text-only (QLoRA)
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axolotl train examples/qwen3.5/122b-a10b-moe-qlora.yaml
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# 9B vision+text (LoRA, multimodal dataset)
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axolotl train examples/qwen3.5/9b-lora-vision.yaml
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# 9B vision+text FFT, single 80 GiB GPU (~61 GiB peak)
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axolotl train examples/qwen3.5/9b-fft-vision.yaml
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```
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### TIPS
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- For inference, you can experiment with `temperature: 0.7`, `top_p: 0.8`, `top_k: 20`, and `min_p: 0`.
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- For **text-only FFT** on 27B, use `27b-fft.yaml` which sets `unfrozen_parameters` to freeze the vision encoder (`model.visual.*`) — this avoids wasting optimizer state on parameters that receive no gradient from text-only data.
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- You can run a full finetuning of smaller configs by removing `adapter: qlora` and `load_in_4bit: true`. See [Multi-GPU](#optimization-guides) below.
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- Read more on loading your own dataset at [docs](https://docs.axolotl.ai/docs/dataset_loading.html).
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- The dataset format follows the OpenAI Messages format as seen [here](https://docs.axolotl.ai/docs/dataset-formats/conversation.html#chat_template).
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- For **multimodal** finetuning, set `processor_type: AutoProcessor`, `skip_prepare_dataset: true`, and `remove_unused_columns: false` as shown in `9b-lora-vision.yaml`.
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- The Gated DeltaNet linear attention layers (`linear_attn.*`) can optionally be added to `lora_target_modules` — they are commented out by default.
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## Optimization Guides
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- [Optimizations Guide](https://docs.axolotl.ai/docs/optimizations.html)
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## Related Resources
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- [Qwen3.5 Blog](https://qwenlm.github.io/blog/qwen3.5/)
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- [Axolotl Docs](https://docs.axolotl.ai)
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- [Axolotl Website](https://axolotl.ai)
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- [Axolotl GitHub](https://github.com/axolotl-ai-cloud/axolotl)
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- [Axolotl Discord](https://discord.gg/7m9sfhzaf3)
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