diff --git a/src/exo/worker/runner/runner.py b/src/exo/worker/runner/runner.py
index 3a5619f4..1c278994 100644
--- a/src/exo/worker/runner/runner.py
+++ b/src/exo/worker/runner/runner.py
@@ -101,15 +101,11 @@ def _should_use_serial_processing(
     """
     Determine if a ChatCompletion task requires serial processing.
 
-    GPT-OSS models have mixed cache types (KVCache + RotatingKVCache) that
-    don't work reliably with BatchGenerator's batched prefill.
+    Currently always returns False - batch mode handles all cases.
+    Post-processing (GPT-OSS, thinking models, tool calls) can be applied
+    per-request to the individual streams from the batch generator.
     """
-    from mlx_lm.models.gpt_oss import Model as GptOssModel
-
-    # GPT-OSS models don't work reliably with batched generation
-    if isinstance(model, GptOssModel):
-        return True
-
+    # All tasks can use batch mode - post-processing is per-request
     return False