Not Diamond

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A model router that predicts which model will handle each request best, aimed at cutting cost without losing quality. No lifecycle review is recorded for this listing. Its inclusion in the directory does not confirm current availability; check the vendor before relying on it.

Product preview

Overview

Not Diamond predicts, per request, which model will handle it best, so that an application can send the easy calls to cheap models and reserve the expensive ones for the cases that need them. Its current positioning is specifically coding agents, with claimed accuracy gains, cost savings and faster development cycles.

The idea rests on a distribution fact that is easy to accept once stated: across real traffic, requests are not uniformly hard, and paying frontier prices for every one of them is waste. What makes the approach credible or not is how the routing decision is made and evaluated — a router trained on generic benchmarks will make different calls from one fitted to your workload, and the savings figure a vendor quotes comes from a traffic mix you may not have. The failure mode to design against is the request that looked easy and was not, which is why the sensible deployment is with a quality floor and your own evaluations watching, not with savings as the only target.

Sources

The factual claims in this review were read from the pages below. Each date is when an editor last opened the source, not when the product changed.

Vendor site Checked 2026-09-19

Pros / Cons

Pros

Targets the fact that most traffic does not need the most expensive model
Per-request decisions rather than a fixed provider choice
Fits in front of existing calls rather than requiring a rewrite

Cons

Savings depend on your traffic mix; the quoted figures come from the vendor's
A misrouted hard request costs more than the saving it was chasing
Routes through a third party, so your prompts pass through it

Who it's for

Cutting model spend on high-volume applications

Routing coding agent requests between models

Keeping quality while reducing cost per request

Testing whether cheaper models suffice for a workload

Bottom line

Model routing that pays off on the distribution of real traffic — and needs a quality floor so a misjudged request does not cost more than it saves.

Key Features

Per-request model routing

Cost and accuracy trade-off control

Integration with existing SDKs

Routing for coding agents

Savings estimation

Frequently asked questions

Is Not Diamond currently available?

No lifecycle review is recorded for this listing. Its inclusion in the directory does not confirm current availability; check the vendor before relying on it.

What is Not Diamond?

Not Diamond is a AI Platforms tool developed by Not Diamond. A model router that predicts which model will handle each request best, aimed at cutting cost without losing quality.