Spark-X2.6-4B

AIModelScope announces Spark-X2.6-4B, an open-source model with 1M context and three selectable thinking modes: none, low, and high. The team says it scores 63.3 on average in its reported comparison, ahead of Spark-X2.5-4B at 52.1 and Qwen3.5-9B at 49.1. It ships in FP8, INT8, INT4, and GGUF formats and supports Transformers, SGLang, vLLM, llama.cpp, Ollama, MLX, and LM Studio, under Apache 2.0.

Why it matters: 1M-token context in a 4B open model with none, low and high thinking modes

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