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OpenRouter vs LiteLLM
Trust Score comparison · March 2026
Signal Comparison
500M+API calls / mo900k / wk
N/ACommits (90d)400 commits
N/AGitHub stars18k ★
120 q'sStack Overflow300 q's
GrowingCommunityGrowing
OpenRouterLiteLLM
Key Differences
| Factor | OpenRouter | LiteLLM |
|---|---|---|
| License | Proprietary | MIT |
| Language | TypeScript | Python |
| Hosted | Self-hosted | Self-hosted |
| Free tier | — | — |
| Open Source | — | ✓ Yes |
| TypeScript | ✓ | — |
Pick OpenRouter if…
- You want access to many models through one API key and billing account
- Automatic fallback to alternative models when primary is down
- Comparing model outputs and costs across providers
Pick LiteLLM if…
- You need to switch between LLM providers without rewriting code
- Building a proxy/gateway to centralize API key management and logging
- Experimenting with model cost and latency tradeoffs
Side-by-side Quick Start
OpenRouter
import OpenAI from 'openai';
const client = new OpenAI({
baseURL: 'https://openrouter.ai/api/v1',
apiKey: process.env.OPENROUTER_API_KEY,
});
const response = await client.chat.completions.create({
model: 'anthropic/claude-3.5-sonnet',
messages: [{ role: 'user', content: 'Hello!' }],
});LiteLLM
import litellm
response = litellm.completion(
model="gpt-4o",
messages=[{"role": "user", "content": "Hello!"}]
)
# Same code works for claude-3-5-sonnet, gemini/gemini-pro, etc.
print(response.choices[0].message.content)Community Verdict
Based on upvoted notes🏆
LiteLLM wins this comparison
Trust Score 82 vs 76 · 6-point difference
LiteLLM leads on Trust Score with stronger signal data across downloads and community health. That said, the other tool is worth considering if your use case matches its specific strengths above.