v1.2.3 — Qwen2.5-0.5B-Instruct default model

What's Changed

• Default Transformer.js model upgraded to Qwen2.5-0.5B-Instruct (from SmolLM2-135M-Instruct)
  • 500M params (3.7× larger), significantly better completions
  • IFEval ~51 vs 29.9 (SmolLM2-135M)
• Default dtype changed from q4 to q4f16 (~500MB download)
• Uses Transformers.js v3+ native chat template (messages API instead of manual <|im_start|> formatting)
• Default maxNewTokens increased from 30 to 40

Model comparison

Model	Params	IFEval	Download
SmolLM2-135M-Instruct (old)	135M	29.9	~30MB (q4)
Qwen2.5-0.5B-Instruct (new)	500M	~51	~500MB (q4f16)