Does temperature break JSON output? Small LLMs, measured
3 small local LLMs, 20 emails to JSON at temperature 0, 0.8 and 1.5. With llama.cpp's default samplers, JSON stayed valid. Without them, 1.5 broke it.
3 small local LLMs, 20 emails to JSON at temperature 0, 0.8 and 1.5. With llama.cpp's default samplers, JSON stayed valid. Without them, 1.5 broke it.
6 small local LLMs, 20 emails to JSON, with and without llama.cpp's json_schema grammar. Valid JSON went to 100%; right answers did not move.
10 small LLMs on a 2-core laptop CPU: speed, RAM, first-token time and a 20-question check. Gemma 4 E2B was the best trade-off.
I benchmarked Ollama and llama.cpp on a 2-core laptop CPU with the same GGUF files. With equal settings the speed matched. The defaults did not.