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Merged
zucchini-nlp merged 3 commits into from
Mar 4, 2026
Merged

Add Qwen3.5 support for sequence classification #44406

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3bdc00b
Add Qwen3.5 support for sequence classification
medhakimbedhief Mar 3, 2026
937b2e0
Update Qwen3.5 text model tests to include sequence classification su…
medhakimbedhief Mar 3, 2026
b4b2548
Add Qwen3_5ForSequenceClassification documentation
medhakimbedhief Mar 3, 2026
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5 changes: 5 additions & 0 deletions docs/source/en/model_doc/qwen3_5.md
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Expand Up @@ -66,6 +66,11 @@ TODO
[[autodoc]] Qwen3_5ForCausalLM
- forward

## Qwen3_5ForSequenceClassification

[[autodoc]] Qwen3_5ForSequenceClassification
- forward

## Qwen3_5ForConditionalGeneration

[[autodoc]] Qwen3_5ForConditionalGeneration
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2 changes: 2 additions & 0 deletions src/transformers/models/auto/modeling_auto.py
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Expand Up @@ -1253,6 +1253,8 @@ class _BaseModelWithGenerate(PreTrainedModel, GenerationMixin):
("qwen2", "Qwen2ForSequenceClassification"),
("qwen2_moe", "Qwen2MoeForSequenceClassification"),
("qwen3", "Qwen3ForSequenceClassification"),
("qwen3_5", "Qwen3_5ForSequenceClassification"),
("qwen3_5_text", "Qwen3_5ForSequenceClassification"),
("qwen3_moe", "Qwen3MoeForSequenceClassification"),
("qwen3_next", "Qwen3NextForSequenceClassification"),
("reformer", "ReformerForSequenceClassification"),
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7 changes: 6 additions & 1 deletion src/transformers/models/qwen3_5/modeling_qwen3_5.py
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Expand Up @@ -34,7 +34,7 @@
from ...integrations import use_kernelized_func
from ...masking_utils import create_causal_mask
from ...modeling_flash_attention_utils import FlashAttentionKwargs
from ...modeling_layers import GradientCheckpointingLayer
from ...modeling_layers import GenericForSequenceClassification, GradientCheckpointingLayer
from ...modeling_outputs import (
BaseModelOutputWithPast,
BaseModelOutputWithPooling,
Expand Down Expand Up @@ -1871,6 +1871,10 @@ def forward(
)


class Qwen3_5ForSequenceClassification(GenericForSequenceClassification, Qwen3_5PreTrainedModel):
config: Qwen3_5TextConfig


@dataclass
@auto_docstring(
custom_intro="""
Expand Down Expand Up @@ -2283,6 +2287,7 @@ def _expand_dict_for_generation(dict_to_expand):
"Qwen3_5TextModel",
"Qwen3_5Model",
"Qwen3_5ForCausalLM",
"Qwen3_5ForSequenceClassification",
"Qwen3_5ForConditionalGeneration",
"Qwen3_5PreTrainedModel",
]
7 changes: 6 additions & 1 deletion src/transformers/models/qwen3_5/modular_qwen3_5.py
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Expand Up @@ -22,7 +22,7 @@
from ... import initialization as init
from ...cache_utils import Cache
from ...masking_utils import create_causal_mask
from ...modeling_layers import GradientCheckpointingLayer
from ...modeling_layers import GenericForSequenceClassification, GradientCheckpointingLayer
from ...modeling_outputs import BaseModelOutputWithPast, BaseModelOutputWithPooling
from ...modeling_rope_utils import RopeParameters
from ...modeling_utils import PreTrainedModel
Expand Down Expand Up @@ -807,6 +807,10 @@ def __init__(self, config):
self.model = Qwen3_5TextModel(config)


class Qwen3_5ForSequenceClassification(GenericForSequenceClassification, Qwen3_5PreTrainedModel):
config: Qwen3_5TextConfig


class Qwen3_5ForConditionalGeneration(Qwen3VLForConditionalGeneration):
def get_video_features(
self,
Expand All @@ -828,6 +832,7 @@ def get_image_features(
"Qwen3_5TextModel",
"Qwen3_5Model",
"Qwen3_5ForCausalLM",
"Qwen3_5ForSequenceClassification",
"Qwen3_5ForConditionalGeneration",
"Qwen3_5PreTrainedModel",
]
2 changes: 2 additions & 0 deletions tests/models/qwen3_5/test_modeling_qwen3_5.py
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Expand Up @@ -38,6 +38,7 @@
Qwen3_5Config,
Qwen3_5ForCausalLM,
Qwen3_5ForConditionalGeneration,
Qwen3_5ForSequenceClassification,
Qwen3_5Model,
Qwen3_5TextConfig,
Qwen3_5TextModel,
Expand All @@ -49,6 +50,7 @@ class Qwen3_5TextModelTester(CausalLMModelTester):
if is_torch_available():
base_model_class = Qwen3_5TextModel
causal_lm_class = Qwen3_5ForCausalLM
sequence_classification_class = Qwen3_5ForSequenceClassification

def __init__(self, parent):
super().__init__(parent=parent)
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