Intelligence density
evaluation_metricsIntelligence density is Prism ML's size-normalized quality metric for LLM deployments. It is defined as:
D = -log₂(1 - score/100) / size_GB
where score is the model's average benchmark score in percent and size_GB is the deployed size in GB. The numerator converts the error rate into an information-style scale (quality gains close to 100 count for more), and dividing by gigabytes measures how much benchmark intelligence each GB of footprint buys — reframing model choice from best score to most intelligence per gigabyte.
For Ternary-Bonsai-2-27B-gguf: an 84.78 average over 14 thinking-mode benchmarks at 5.95 GB gives D = 0.457/GB — about 1.8x the densest conventional build (Qwen3.8-27B IQ2_XXS at 0.257/GB), nearly 9x the FP16 baseline (0.053/GB at 54.66 GB), and up from the previous release (Ternary Bonsai 27B at 0.416/GB). Prism ML introduced the metric when the Bonsai line launched and has used it to frame every release since.