Not Diamond
Not Diamond selects language models for incoming queries and lets developers train custom routers on their own data.
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What it does
- Model inference
- Model training
Features 3
- Intelligent model routingPre-trained router that predicts the best model per request, or custom routers trained on your own data.
- Automatic prompt optimizationAutomatically optimizes prompts to improve accuracy and adapt to new models.
- Python, TypeScript and REST API supportIntegrates across technology stacks through Python and TypeScript SDKs and a REST API.
Sources
- Pricing
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Pricing page: "$10 for every 10K additional recommendations"
- Description
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Official documentation · 14 Oct 2026
Product page: "Not Diamond intelligently predicts which model to use for each input"
- What it does
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Official documentation · 14 Oct 2026
Product page: "Not Diamond intelligently predicts which model to use for each input"
- Sold within
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Sold on its own with published plans.
- Name
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Official documentation · 14 Oct 2026
Name as published on the product page.
- URL
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Official documentation · 18 Oct 2026
The routing and prompt-optimization API's documentation home; the company home page now presents Not Diamond Code.; "Not Diamond is an intelligent AI model router and prompt optimization that helps developers improve AI accuracy while radically reducing inference spend."
- Deployment
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Official documentation · 14 Oct 2026
Product page: "router available via an API"
- Interfaces
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Official documentation · 14 Oct 2026
Product page: "router available via an API"
Also from Not Diamond
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Not Diamond Code Developer tool
Model router for coding agents: a local proxy that picks the model and reasoning effort for each step of a Claude Code session, in the terminal or in IDE extensions, to cut inference cost at frontier quality, with a dashboard of usage and savings.
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