From f35077388df356974469d557894592db7f52a985 Mon Sep 17 00:00:00 2001
From: Daniel Han <danielhanchen@gmail.com>
Date: Fri, 22 Aug 2025 04:02:59 -0700
Subject: [PATCH] Update vision.py

---
 unsloth/models/vision.py | 30 +++++++++++++++++++++---------
 1 file changed, 21 insertions(+), 9 deletions(-)

diff --git a/unsloth/models/vision.py b/unsloth/models/vision.py
index 6790c5cd12..fc31032594 100644
--- a/unsloth/models/vision.py
+++ b/unsloth/models/vision.py
@@ -73,6 +73,9 @@ global PROMPT_LOOPKUP
 PROMPT_LOOPKUP = dict()
 
 from transformers import GenerationConfig, CompileConfig, HybridCache
+from transformers import PretrainedConfig
+HAS_TORCH_DTYPE = "torch_dtype" in PretrainedConfig.__doc__
+
 _compile_config = CompileConfig(
     fullgraph = False,
     dynamic = None,
@@ -118,7 +121,7 @@ def unsloth_base_fast_generate(
     bsz = input_ids.shape[0]
 
     FastBaseModel.for_inference(self)
-    dtype = _get_dtype(self.config.torch_dtype)
+    dtype = _get_dtype(getattr(self.config, "dtype", None) or getattr(self.config, "torch_dtype", None))
 
     # Check if VLM
     is_vlm = any(
@@ -213,7 +216,8 @@ def unsloth_base_fast_generate(
         cache_implementation = None
     if cache_implementation is not None:
         swa = getattr(getattr(self.config, "text_config", self.config), "sliding_window", None)
-        if swa == 0 or type(swa) is not int:
+        if (swa == 0 or type(swa) is not int) \
+            and (getattr(self, "_can_compile_fullgraph", True) is True):
             cache_implementation = "static"
         else:
             cache_implementation = "hybrid"
@@ -245,7 +249,6 @@ def unsloth_base_fast_generate(
     return output
 pass
 
-
 class FastBaseModel:
 
     @staticmethod
@@ -358,12 +361,13 @@ class FastBaseModel:
             custom_datatype = os.environ["UNSLOTH_FORCE_CUSTOM_DTYPE"]
             assert custom_datatype.count(";") >= 4
             checker, _dtype, _bnb_compute_dtype, _custom_datatype, execute_code = custom_datatype.split(";", 4)
-
             # Allow custom dtypes on all runs
             allow_all_runs = (checker == "all")
             # Allow only on float16 datatypes
-            allow_float16_runs = (checker == "float16" and dtype == torch.float16)
-
+            allow_float16_runs = (
+                (checker == "float16" or checker == "torch.float16") and \
+                (dtype == torch.float16 or os.environ.get("UNSLOTH_FORCE_FLOAT32", "0") == "1")
+            )
             if allow_all_runs or allow_float16_runs:
                 if eval(_dtype) is not None:
                     dtype = eval(_dtype)
@@ -383,7 +387,7 @@ class FastBaseModel:
         if not ("attn_implementation" in kwargs):
             kwargs["attn_implementation"] = "sdpa"
         if not supports_sdpa:
-            print(f"Unsloth: {model_type_arch.title()} does not support SDPA - switching to eager!")
+            print(f"Unsloth: {model_type_arch.title()} does not support SDPA - switching to fast eager.")
             del kwargs["attn_implementation"]
         pass
 
@@ -440,11 +444,17 @@ class FastBaseModel:
         torch_dtype = dtype
         if do_forced_float32: torch_dtype = torch.bfloat16
 
+        if HAS_TORCH_DTYPE:
+            kwargs["torch_dtype"] = torch_dtype
+        else:
+            # Transformers removed torch_dtype
+            kwargs["dtype"] = torch_dtype
+
         raise_handler = RaiseUninitialized()
         model = auto_model.from_pretrained(
             model_name,
             device_map              = device_map,
-            torch_dtype             = torch_dtype,
+            # torch_dtype           = torch_dtype, # Transformers removed torch_dtype
             # quantization_config   = bnb_config,
             token                   = token,
             trust_remote_code       = trust_remote_code,
@@ -695,7 +705,9 @@ class FastBaseModel:
         full_finetuning = os.environ.get("UNSLOTH_ENABLE_FULL_FINETUNING", "0") == "1"
 
         float32_mixed_precision = True
-        if _get_dtype(model.config.torch_dtype) == torch.bfloat16 and full_finetuning:
+        if _get_dtype(
+                getattr(model.config, "dtype", None) or getattr(model.config, "torch_dtype", None)
+            ) == torch.bfloat16 and full_finetuning:
             # Use bfloat16 precision for full finetuning
             float32_mixed_precision = False