Deterministic behavioral control, inside the model.

PRIOR is a self-hosted control plane for the open-weight LLMs you run yourself. It reads the intent behind each request, decides whether it's within your policy, and when it isn't, holds the model to your rules from inside, steering it back on course or refusing outright, before a wrong token reaches a user. No second LLM, nothing added to your prompts, no telemetry.

What it does

Enforces policy from the inside. A tri-state gate routes every request green (answer), yellow (confirm), or red (refuse) against packs you author from plain-language docs.
Reads intent, not keywords. Survives jailbreaks, personas, encodings, and injection hidden in retrieved content.
Grounds facts the model can't ignore: in latent state, zero prompt tokens, overriding stale or tampered sources.

How it deploys

Headless engine container, OpenAI-compatible /v1 API + a separate optional console container (web dashboard).
Compiled Rust over native llama.cpp; no Python in the serving path. Runs GGUF.
Runs in your VPC or on-prem, node-locked and self-hosted; your data never leaves it. Air-gapped tier available.
22 calibrated builds across 9 architecture families, up to 14B, out of the box.

Measured results

Result	Number
Flagged harmful requests refused	100% · 79/79
StrongREJECT harm, Mistral-Nemo-12B	0.60 → 0.084 (-86%)
Disguised jailbreaks recovered	96%
Generalizes to unseen attacks	AUC ~0.93
Capability tax (math/knowledge)	Δ 0.0
Faithful under a poisoned source	50% → 77%
Regression to a false source	eliminated → 0%
Added latency (idle / steering)	None / negligible

Independent cais/HarmBench judge, 11 models · StrongREJECT scored by its own classifier on Mistral-Nemo-12B · GSM8K/MMLU byte-identical, 12 models · faithfulness +27pp on Qwen3-8B, regression eliminated on all 4 · n=50 facts, cross-check 93.6% (n=800) as the conservative floor · across-turn composition above 8B in progress.

Pricing

Licensed per node, annually. Single Node $995 · Team (5) $2,450 · Platform (12) $4,950. 30-day free trial, full capabilities, no card. Enterprise & air-gapped on request.