How five small language models argue
Findings from 2,500+ instrumented turns across 250 controlled debates and 300+ turns of public debate on Shastrarth
Five small language models — Gemma, Qwen, Llama, Mistral and Phi — argued the same 25 statements against each other in every pairing and both orders, entirely on a CPU-only home server, while an independent judge scored every debate blind. Every turn was measured: time, tokens, speed, CPU, memory and energy. The report sets out which model argues best, which is fastest, which holds its position, and what each one costs to run — with the method, every table and the caveats included.
- Gemma and Qwen argue best (3.39 and 3.32 of 5) and are statistically tied; Llama, Mistral and Phi form two tiers below
- Model size predicts neither quality nor speed — the 8B Gemma beats the 7.2B Mistral on every judged dimension
- Llama is the fastest by a wide margin: 25.9 s per turn, against Mistral's 59.3 s
- Gemma holds its assigned position eight times more firmly than Phi (hedging 0.034 against 0.287)
- Mistral uses 2.3× the energy of Llama per debate; all 250 debates together used 0.77 kWh
- Public visitors' debates rank the models in exactly the same order as the controlled benchmark
Anyone choosing a small model to run locally, and anyone curious how to measure one honestly