Not Diamond vs OpenRouter
No leader: the top candidate OpenRouter has only 0.34 confidence (low), below the 0.35 needed to declare a winner. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.
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
A 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.
OpenRouter
OpenRouter provides a unified, OpenAI-compatible API that consolidates access to over 500 language models from 80+ providers. It features automatic failover for reliability, cost-optimized routing, transparent provider pricing with modest platform fees, and support for multiple deployment and authentication methods.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Not Diamond
$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
OpenRouter
Free tier with 50 requests/day, or pay-as-you-go at 5.5% markup
- FreeFree
- Chat and API access
- 25+ free models
- 4 free providers
- 50 requests/day rate limit
- Community support
- Standard5.5% platform fee on provider pricing
- Pay-as-you-go usage billing
- 500+ models
- 80+ providers
- Email support
- Budgets and spend controls
- +2 more
- BusinessContact sales
- Fee discounts available
- 500+ models
- 80+ providers
- Custom rate limits
- Invoicing options
- EnterpriseContact sales
- Custom pricing
- 500+ models
- 80+ providers
- Dedicated support team
- Contractual SLAs
- +2 more
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
Not documented yet.
OpenRouter
- Vercel AI SDK
- Claude Code
- Cursor
- OpenAI SDK
- OpenAI
- Anthropic
- Meta
- Mistral
- Model Context Protocol (MCP)
- Terraform
Not Diamond or OpenRouter: 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.