Per-step model routing
Predicts which model to use for each prompt or step so teams can balance quality and cost across agent workflows.
Not Diamond
RivendicaNot Diamond is an intelligent model router for coding agents that improves quality and lowers cost with secure, privacy-preserving enterprise deployment options.
What Not Diamond does
Not Diamond is an intelligent model router for coding agents. It predicts which AI model to use for each prompt or step, with the stated goal of improving quality while lowering cost for engineering teams working on long-horizon agent workloads.
The product is positioned as a secure integration layer that works with existing harnesses and gateway infrastructure rather than acting as a gateway itself. The site says it is designed for production-grade workflows, supports continuous learning from usage signals, and offers privacy-preserving routing options for teams that need to keep payload data local.
Core capabilities
Context-aware decisioning
Uses signals such as payload semantics, KV cache state, implicit feedback, session outcomes, sub-agent architecture, compaction events, and prior turns to make recommendations.
Works with your current stack
Integrates with existing gateway infrastructure rather than replacing it, and is described as stack agnostic through a secure API.
Continuous learning loop
Supports continuous learning from harness usage and session outcomes, with reinforcement learning used to improve recommendations over time.
Privacy-preserving routing
Offers privacy-preserving routing that relies on derived request metadata and locally computed features, without seeing payloads, inputs, or outputs.
Enterprise deployment options
Provides organization-wide analytics for enterprise customers, along with advanced security and admin controls, MDM deployments, SSO with SAML, SLAs, and 24/7 support.
Where it fits
Reduce coding-agent costs
Use Not Diamond when a team wants to lower inference spend across coding-agent workflows without manually choosing a model for every step.
Improve model selection from context
Use it when agent quality matters and routing decisions need to account for prompt context, cache state, prior turns, and session outcomes.
Add routing to an existing stack
Use it when you already have a gateway and harness in place and want routing to fit into that stack rather than replace it.
Keep payload data local
Use it when teams need privacy-preserving routing for sensitive workloads and want decisioning based on derived metadata instead of raw payloads.
Deploy across an organization
Use it when an enterprise team needs centralized analytics, admin controls, SSO, MDM deployment support, and SLAs around routing infrastructure.
Pros and Cons
Pros
- Built specifically for coding-agent workloads rather than general-purpose model selection.
- Integrates with existing harness and gateway setups instead of requiring a new gateway.
- Includes privacy-preserving routing that does not require the product to see payloads, inputs, or outputs.
- Supports continuous learning from harness usage and session outcomes.
- Offers a separate enterprise path with analytics, security, admin controls, SSO, SLAs, and 24/7 support.
Cons
- The pricing page adds about 100-200ms of latency per routing recommendation on average.
- The public pages do not spell out every supported harness, gateway, or enterprise deployment workflow in detail.
- Pricing is described in broad terms on the site, but exact rates and plan limits are not published in the provided material.
FAQ
What is intelligent model routing?
Intelligent model routing predicts which AI model to use for each prompt so a team can improve accuracy while reducing cost. Not Diamond applies that approach to coding-agent workflows.
Is Not Diamond a gateway?
No. The pricing page says Not Diamond is not a gateway; it integrates with your existing gateway infrastructure and works with your model gateway and harness of choice.
Does Not Diamond work with coding agents?
The product is described as purpose-built for long-horizon coding agent workloads and works with a variety of coding agent harnesses. The pricing page also notes that custom harness integration needs can be discussed with the team.
Does Not Diamond work with Claude Code?
Yes. The pricing FAQ says Not Diamond works with Claude Code and is consistent with Anthropic's commercial terms of service when used solely with Anthropic models.
How much can teams save and what is the latency impact?
The pricing page says teams using Not Diamond achieve at least 20-40% cost savings, and often more, without degradation in quality relative to the frontier. It also says the router adds about 100-200ms per step on average.
Quick Facts
- Category
- Developer tool / AI infrastructure
- Primary use
- Model routing for coding agents
- Integration approach
- Works with existing gateway infrastructure and coding-agent harnesses
- Pricing shape
- Free to try for early access; enterprise contact sales
- Privacy option
- Privacy-preserving routing using derived metadata and local features
- Source domain
- notdiamond.ai