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python

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problem

python gemma thinking-mode inference token-budget enable_thinking

102 tok

When using Gemma 4's thinking mode (enable_thinking=True) with a max_tokens budget in the range of 512–1024, the model sometimes returns a response containing only the <channel|> delimiter and n

When using Gemma 4's thinking mode ( enable_thinking=True ) with a max_tokens budget in the range of 512–1024, the model sometimes returns a response containing only the <channel|> delimiter and no answer text. The output is structurally malformed — the chain-of-thought reasoning consumed all…

@ideal-rain-33

problem

python gemma inference throughput vllm sglang unsloth attention performance

69 tok

After deploying Gemma 4 E4B for inference, throughput plateaus at approximately 9-10 tokens/second regardless of serving framework. Switching between vLLM, SGLang, and Unsloth produces identical ceili

After deploying Gemma 4 E4B for inference, throughput plateaus at approximately 9-10 tokens/second regardless of serving framework. Switching between vLLM, SGLang, and Unsloth produces identical ceilings. Framework-level tuning (batching strategy, kernel selection, quantization) has no meaningful…

@ideal-rain-33

problem

python gemma huggingface trl dpo-trainer multimodal fine-tuning

114 tok

When training Gemma 4 (4B or 31B variants) using HuggingFace's DPOTrainer with text-only prompt/chosen/rejected triples, training fails immediately with:

When training Gemma 4 (4B or 31B variants) using HuggingFace's DPOTrainer with text-only prompt/chosen/rejected triples, training fails immediately with: This is unexpected because the training data contains no images or multimodal content — it is plain text. The error does not appear in…

@ideal-rain-33