diff --git a/test/models/test_cifar.py b/test/models/test_cifar.py
deleted file mode 100644
index 3da04365..00000000
--- a/test/models/test_cifar.py
+++ /dev/null
@@ -1,43 +0,0 @@
-import unittest
-from tinygrad.tensor import Tensor
-from tinygrad.nn import optim
-from tinygrad.state import get_parameters
-from examples.hlb_cifar10 import SpeedyResNet
-from tinygrad.jit import TinyJit, JIT_SUPPORTED_DEVICE
-from tinygrad.ops import GlobalCounters
-from tinygrad.lazy import Device
-
-class TestCifar(unittest.TestCase):
-  @unittest.skipUnless(Device.DEFAULT in JIT_SUPPORTED_DEVICE, "needs JIT")
-  def test_train_step(self):
-    # TODO: with default device
-    #old_default = Device.DEFAULT
-    #Device.DEFAULT = "FAKE"
-    #Device['fake'].codegen = Device[old_default].codegen
-
-    # TODO: with train
-    old_training = Tensor.training
-    Tensor.training = True
-
-    model = SpeedyResNet()
-    optimizer = optim.SGD(get_parameters(model), lr=0.01, momentum=0.8, nesterov=True, weight_decay=0.15)
-
-    @TinyJit
-    def train(X):
-      out = model(X)
-      loss = out.mean()
-      optimizer.zero_grad()
-      loss.backward()
-      optimizer.step()
-    for _ in range(3): train(Tensor.randn(32, 3, 32, 32))
-
-    print(f"used {GlobalCounters.mem_used/1e9} GB and {len(train.jit_cache)} kernels")
-    assert GlobalCounters.mem_used/1e9 < 0.55, "CIFAR training used more than 0.55 GB"
-    assert len(train.jit_cache) <= 236, "CIFAR training used more than 236 kernels"
-
-    # reset device
-    Tensor.training = old_training
-    #Device.DEFAULT = old_default
-
-if __name__ == '__main__':
-  unittest.main()
diff --git a/test/models/test_real_world.py b/test/models/test_real_world.py
new file mode 100644
index 00000000..1ec83df0
--- /dev/null
+++ b/test/models/test_real_world.py
@@ -0,0 +1,97 @@
+import unittest, time
+from tinygrad.tensor import Tensor
+from tinygrad.nn import optim
+from tinygrad.state import get_parameters
+from tinygrad.jit import TinyJit, JIT_SUPPORTED_DEVICE
+from tinygrad.ops import GlobalCounters, LazyOp, LoadOps
+from tinygrad.lazy import Device
+from tinygrad.helpers import CI, dtypes
+
+from examples.hlb_cifar10 import SpeedyResNet
+from examples.llama import Transformer, args_7B
+from examples.stable_diffusion import UNetModel
+
+def helper_test(nm, gen, train, max_memory_allowed, max_kernels_allowed):
+  tms = []
+  for _ in range(4):
+    GlobalCounters.reset()
+    Device[Device.DEFAULT].synchronize()
+    st = time.perf_counter_ns()
+    train(*gen())
+    Device[Device.DEFAULT].synchronize()
+    tms.append(time.perf_counter_ns() - st)
+
+  kernels_used = len(train.jit_cache) if hasattr(train, "jit_cache") else None
+  print(f"{nm}: used {GlobalCounters.mem_used/1e9:.2f} GB and {kernels_used} kernels in {min(tms)/1e6:.2f} ms")
+  assert GlobalCounters.mem_used/1e9 < max_memory_allowed, f"{nm} used more than {max_memory_allowed:.2f} GB"
+  assert not kernels_used or kernels_used <= max_kernels_allowed, f"{nm} used more than {max_kernels_allowed} kernels"
+
+# for speed
+def derandomize(x):
+  if isinstance(x, LazyOp):
+    if x.op == LoadOps.RAND: x.op = LoadOps.EMPTY
+    x.src = [derandomize(s) for s in x.src]
+  else:
+    x.op = derandomize(x.op)
+  return x
+
+def derandomize_model(model):
+  for p in get_parameters(model):
+    p.lazydata = derandomize(p.lazydata)
+    p.realize()
+
+class TestRealWorld(unittest.TestCase):
+  @unittest.skipUnless(not CI, "too big for CI")
+  def test_stable_diffusion(self):
+    model = UNetModel()
+    derandomize_model(model)
+    @TinyJit
+    def test(t, t2): return model(t, 801, t2).realize()
+    helper_test("test_sd", lambda: (Tensor.randn(1, 4, 64, 64),Tensor.randn(1, 77, 768)), test, 14.04, 912)
+
+  @unittest.skipUnless(Device.DEFAULT in JIT_SUPPORTED_DEVICE, "needs JIT")
+  def test_llama(self):
+    old_type = Tensor.default_type
+    Tensor.default_type = dtypes.float16
+
+    args_tiny = {"dim": 1024, "multiple_of": 256, "n_heads": 8, "n_layers": 8, "norm_eps": 1e-05, "vocab_size": 1000}
+    model = Transformer(**(args_tiny if CI else args_7B))
+    derandomize_model(model)
+    @TinyJit
+    def test(t): return model(t, 0).realize()
+    helper_test("test_llama", lambda: (Tensor([[1,]]),), test, 0.22 if CI else 13.5, 126 if CI else 486)
+
+    Tensor.default_type = old_type
+
+  @unittest.skipUnless(Device.DEFAULT in JIT_SUPPORTED_DEVICE, "needs JIT")
+  def test_train_cifar(self):
+    # TODO: with default device
+    #old_default = Device.DEFAULT
+    #Device.DEFAULT = "FAKE"
+    #Device['fake'].codegen = Device[old_default].codegen
+
+    # TODO: with train
+    old_training = Tensor.training
+    Tensor.training = True
+
+    model = SpeedyResNet()
+    optimizer = optim.SGD(get_parameters(model), lr=0.01, momentum=0.8, nesterov=True, weight_decay=0.15)
+
+    BS = 32 if CI else 512
+
+    @TinyJit
+    def train(X):
+      out = model(X)
+      loss = out.mean()
+      optimizer.zero_grad()
+      loss.backward()
+      optimizer.step()
+
+    helper_test("train_cifar", lambda: (Tensor.randn(BS, 3, 32, 32),), train, (0.55/32)*BS, 236)
+
+    # reset device
+    Tensor.training = old_training
+    #Device.DEFAULT = old_default
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/test/test_speed_v_torch.py b/test/test_speed_v_torch.py
index c2f604b7..06a63f3a 100644
--- a/test/test_speed_v_torch.py
+++ b/test/test_speed_v_torch.py
@@ -125,6 +125,7 @@ class TestBigSpeed(unittest.TestCase):
     helper_test_generic_square('gemm', 4096, f, f)
   def test_large_conv_1x1(self): helper_test_conv(bs=32, in_chans=128, out_chans=128, kernel_size=1, img_size_y=128, img_size_x=128)
   def test_large_conv_3x3(self): helper_test_conv(bs=32, in_chans=128, out_chans=128, kernel_size=3, img_size_y=130, img_size_x=130)
+  def test_large_conv_5x5(self): helper_test_conv(bs=16, in_chans=128, out_chans=128, kernel_size=5, img_size_y=130, img_size_x=130)
 
 @unittest.skipIf((getenv("BIG") == 1 or Device.DEFAULT == "WEBGPU"), "only big tests")
 class TestSpeed(unittest.TestCase):
diff --git a/tinygrad/helpers.py b/tinygrad/helpers.py
index 2f89a55a..a0060b21 100644
--- a/tinygrad/helpers.py
+++ b/tinygrad/helpers.py
@@ -9,6 +9,7 @@ from math import prod # noqa: F401 # pylint:disable=unused-import
 ShapeType = Tuple[int, ...]
 # NOTE: helpers is not allowed to import from anything else in tinygrad
 OSX = platform.system() == "Darwin"
+CI = os.getenv("CI", "") != ""
 
 def dedup(x): return list(dict.fromkeys(x))   # retains list order
 def argfix(*x):
diff --git a/tinygrad/lazy.py b/tinygrad/lazy.py
index cf68b506..3c8fcda9 100644
--- a/tinygrad/lazy.py
+++ b/tinygrad/lazy.py
@@ -362,7 +362,7 @@ def _realize_empty(buffer: LazyBuffer) -> None:
 
 def _realize_rand(buffer: LazyBuffer) -> None:
   rng = np.random.default_rng(buffer.op.arg)
-  buffer.realized = Device[buffer.device].buffer.fromCPU(rng.random(size=buffer.shape, dtype=buffer.dtype.np), **buffer._device_extra_args()) # type: ignore
+  buffer.realized = Device[buffer.device].buffer.fromCPU(rng.random(size=buffer.shape, dtype=np.float32).astype(dtype=buffer.dtype.np, copy=False), **buffer._device_extra_args()) # type: ignore
 
 def _realize_const(buffer: LazyBuffer) -> None:
   if hasattr(Device[buffer.device].codegen, 'supports_constant_folding'):
diff --git a/tinygrad/runtime/ops_cpu.py b/tinygrad/runtime/ops_cpu.py
index 37941ec2..2100dc4f 100644
--- a/tinygrad/runtime/ops_cpu.py
+++ b/tinygrad/runtime/ops_cpu.py
@@ -31,7 +31,7 @@ def einsum_mulacc(einsum, get_strides, expand):
   return mulacc
 
 numpy_fxn_for_op: Dict[Op, Callable] = {**base_fxn_for_op, **{
-  UnaryOps.NOOP: lambda x: np.require(x, requirements='C'), UnaryOps.EXP2: np.exp2, UnaryOps.LOG2: np.log2, UnaryOps.CAST: lambda x,y: x.astype(y.np), UnaryOps.SIN: np.sin,
+  UnaryOps.NOOP: lambda x: np.require(x, requirements='C'), UnaryOps.EXP2: np.exp2, UnaryOps.LOG2: np.log2, UnaryOps.CAST: lambda x,y: x.astype(y.np, copy=False), UnaryOps.SIN: np.sin,
   BinaryOps.MAX: np.maximum, BinaryOps.CMPEQ: lambda x,y: (x==y).astype(np.promote_types(x.dtype,y.dtype)), BinaryOps.ADD: lambda x, y: np.add(*match_types(x, y)),
   BinaryOps.SUB: lambda x, y: np.subtract(*match_types(x, y)), BinaryOps.MUL: lambda x, y: np.multiply(*match_types(x, y)),
   BinaryOps.DIV: lambda x, y: np.divide(*match_types(x, y)), UnaryOps.SQRT: np.sqrt,