OpenRouter vs Stainless (2026)
Updated April 29, 2026
vs
Overview
Rating
10.0 / 10
Rating
10.0 / 10
Best For
Developers and teams who want one API for hundreds of LLMs without provider lock-in
Best For
AI companies and developers building API clients
Product Summary
OpenRouter is an LLM gateway with one OpenAI-compatible API for 500+ models from 80+ providers, billed at provider rates plus a platform fee.
Product Summary
Powers the official SDKs for OpenAI, Anthropic, and others. The de facto gateway interface layer.
Starting Price
$0Per forever
Starting Price
$0Per month
Free Trial
No
Free Trial
Yes
Free Version
Yes
Free Version
Yes
Website
Website
Key features
Core capabilities each platform advertises.
- One OpenAI-compatible API for 500+ models from 80+ providers
- Auto-routing across providers
- Budgets and management API keys
- Prompt caching
- Bring your own keys, fee-free up to $25,000 a month
- SDK generation
- API interface
- Type-safe clients
Strengths and tradeoffs
What each tool does well, and the limitations to keep in mind.
Pros
- One key and one bill across 80+ providers
- Model calls billed at provider rates
- Free plan for prototyping on free models
- BYOK fee-free up to $25,000 of list-price inference a month
- Broadcast sends request traces to tools like Langfuse and Datadog
Cons
- Platform fee of 5.5% on Standard and 8% on Business, with a $0.80 minimum on card purchases
- Doesn't score or evaluate outputs, so quality checks happen in another tool
- Credits may be expired one year after purchase
- Free plan capped at 50 requests a day until you've bought $10 in credits
Pros
- Automates SDK dev
- Type-safe code
- Multi-language
Cons
- Requires OpenAPI
- Limited customization
OpenRouter or Stainless — which should you choose?
Choose OpenRouter if you wantChoose if you want
- Building model-agnostic apps that switch providers freely
- Accessing many providers with one key and one bill
- Comparing models side by side from a single API
- Tracking spend per API key
- Prototyping on free models
Choose Stainless if you wantChoose if you want
Data not available
Compare the models
How OpenRouter's and Stainless's models score on public benchmarks, and their live API status.
Compare OpenRouter and Stainless on your own traffic
10KFree traces/mo
1,000+Models
5 minSetup
Respan lets you trace LLM and agent calls across any model or framework, A/B test prompts on production traffic, and route requests across 1,000+ models through one gateway.
Try Respan free