Not Diamond vs One API
On the evidence we track, Not Diamond leads this comparison with a composite score of 62/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.
Capabilities
Feature-by-feature on the axes that matter for llm gateways. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
Not Diamond
LeaderA model routing service for coding agents that uses machine learning to predict and recommend the most cost-effective and accurate AI model for each request. Engineering teams typically achieve 20-40% cost savings without quality degradation through continuous learning from real usage patterns.
One API
An open-source system for managing and redistributing API access across multiple large language model providers—including OpenAI, Claude, Gemini, and others—through a single OpenAI-compatible API. Deploys as a self-contained binary or Docker container.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Not Diamond
Leader$0.05 per million tokens; enterprise plans available
- Pay-as-you-go$0.05 per million tokens routed
- Multi-harness support
- Multi-provider support
- Savings and usage dashboard
- Continuous learning from harness usage
- EnterpriseContact sales
- Volume-based discounts
- Organization-wide analytics
- Advanced security and admin controls
- SSO with SAML
- Privacy-preserving deployment
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
Not Diamond
LeaderNot documented yet.
One API
- OpenAI
- Azure OpenAI
- Anthropic Claude
- Google Gemini
- DeepSeek
- ByteDance Douyin
- ChatGLM
- Baidu ERNIE Bot
- iFLYTEK Spark
- Alibaba Tongyi Qianwen
- 360 Brain
- Tencent Hunyuan
- Cloudflare Gateway
- Alibaba Qwen
- Tencent Yuan
- Baidu Wenxin
- Byte Doubao
- 360 AI Brain
- Claude
- Gemini
- Doubao
- Ernie
- Spark
- Qwen
- +2 more
Not Diamond or One API: which one depends on you
A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.
Free to run, no account needed to start. How the evaluation works
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.