Gemma 4 MLX misses thinking mode

This looks more like an integration bug than a model limitation: the model can reason, but the MLX packaging may not be turning that capability on.

• –Google’s Gemma 4 model card says reasoning is built in and thinking is configurable, so the capability exists in the family itself.
• –The LM Studio Gemma 4 MLX template includes `enable_thinking` and `<|think|>` handling, which points to template/config plumbing as the place to check.
• –A matching Hugging Face discussion shows Gemma 4 can lose its thinking channel in certain template paths, so “missing reasoning” can be a rendering/prompting bug rather than a weights issue.
• –LM Studio’s changelog mentions updated Gemma 4 chat-template support and reasoning-related API fields, so upgrading LM Studio and verifying the active template is the first practical fix.
• –For document analysis workflows, preserving the thinking path matters more than raw throughput; speed gains are useful, but not if they disable the model behavior you actually need.