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LiteLLM vs OpenRouter
Trust Score comparison · March 2026
Signal Comparison
900k / wkPyPI downloads500M+
400 commitsCommits (90d)N/A
18k ★GitHub starsN/A
300 q'sStack Overflow120 q's
GrowingCommunityGrowing
LiteLLMOpenRouter
Key Differences
| Factor | LiteLLM | OpenRouter |
|---|---|---|
| License | MIT | Proprietary |
| Language | Python | TypeScript |
| Hosted | Self-hosted | Self-hosted |
| Free tier | — | — |
| Open Source | ✓ Yes | — |
| TypeScript | — | ✓ |
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
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
Side-by-side Quick Start
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)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!' }],
});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.