Not Diamond is the world's most powerful intelligent model router.
We integrate with your existing AI gateway and coding agents to automatically recommend the best model for each prompt, reducing costs at scale while improving accuracy.
Accuracy gains 10% + 10% + Accuracy gains
Cost savings 50% + 50% + Cost savings
Faster dev cycles 10x 10x Faster dev cycles
FOR DEVELOPERS AT THE FRONTIER
1. INTELLIGENT MODEL ROUTING
Intelligent model routing automatically predicts which model to use for each input, dramatically reducing costs over long-running agent workloads while maintaining or improving accuracy.
2. BUILT FOR CODING AGENTS
Our router improves model accuracy and cost efficiency for autonomous coding agents, dramatically improving success rates and unit economics with broad cross-harness and cross-provider support.
3. PROMPT OPTIMIZATION
Prompt optimization automatically optimizes your prompt templates across every model in your stack, outperforming days of manual prompt engineering in minutes of background processing.
We use Not Diamond to power our intelligent routing feature, giving developers the ability to automatically use the best model on every input across every leading language model.

Alex Atallah
CEO and Co-founder, OpenRouter
Not Diamond significantly reduced our inference costs while also driving improvements in output quality. Throughout it all, the Not Diamond team has been incredibly responsive anytime we need support.

Grant Miller
CEO and Co-founder, Replicated
As the leading incident management platform, ensuring high accuracy in Rootly’s AI workflows is paramount. Across our SRE benchmarks, Not Diamond increased the average accuracy by 39%, with some use cases more than doubling in performance.

Sylvain Kalache
Head of AI Labs, Rootly
DESIGNED FOR PRODUCTION-GRADE WORKLOADS
1— Our model router is state-of-the-art across both public benchmarks and production workloads, achieving higher accuracy and cost efficiency than all other techniques.
2— Integrations are stack agnostic through our API or in your VPC—our intelligent recommendations are executed in your model gateway and harness of choice.
3— Not Diamond is SOC-2 and ISO 27001 compliant. We provide ZDR policies, VPC deployments, and 24/7 support to the most sophisticated AI teams in the world.