Lossless context optimization that trims bloated LLM payloads before they hit your bill. Safe mode free, aggressive mode on the hosted plan.
Nadir is a verifier-gated cascade router for LLM traffic. A trained pre-classifier scores each prompt in under 10 ms and picks the lowest viable tier, the cheap model answers, and a verifier scores that answer. Escalation to a stronger model happens only when the answer misses the configured bar. Nadir is OpenAI compatible, so migration is a two-line change: point the base URL at api.getnadir.com and set model to auto. Bring your own keys is supported on every tier.
Nadir can also run beside an existing gateway as a decision-only API, with no provider call and no response traffic, which is how a shadow-mode evaluation works.
On a reference-assisted RouterBench evaluation over 11,420 held-out triples, the cascade ran at 60% lower cost than always-Opus while retaining 98% of its quality, with a 1.7% catastrophic-route rate. Separately, Nadir-Tumbler posts an arena_score of 72.3 on RouterArena's public scorer, 5th of 23 routers, which measures the routing decision on RouterArena's own model pool.
Those are research results. They are not a production guarantee, a universal savings rate, or a forecast for any particular workload. Customer savings are reported from measured execution against a declared baseline, and customer quality only from outcome-labelled traffic. Projected savings and realized savings are separate artifacts and are never blended.
Three rungs, picked by risk appetite. Rung 0 Shadow runs advisory decision calls alongside live traffic and returns a projected receipt, with nothing in the request path changed. Rung 1 Hosted is the two-line swap on a production slice and returns a realized receipt. Rung 2 On-prem is a supervised six-week proof of concept inside the partner's VPC, where no prompt, response, or usage reaches Nadir. The commitments are the same at every rung.
NadirClaw is the self-hosted core, source-available under the PolyForm Noncommercial License. Source-available is the correct label; NadirClaw is not open source. Nadir Route's hosted plan has no base fee and charges a variable fee only on measured savings from requests Nadir executed.
Machine-readable summaries of this site: llms.txt and llms-full.txt.