Which AI Model Should You Use on Velona? A Practical Guide to Choosing Between 300+ Models

With 300+ models available through Velona's gateway, the hardest part often isn't the API integration it's knowing which model to actually use. This guide breaks it down by use case so you're not overpaying for capability you don't need, or underpowering a task that deserves a stronger model.

How Model Routing Works on Velona

Velona aggregates models from multiple providers behind a single OpenAI-compatible endpoint (see the full API documentation). Switching models is usually as simple as changing one parameter in your request no separate SDK, auth, or billing setup per provider.

{
  "model": "MODEL_NAME_HERE",
  "messages": [...]
}

Choosing by Use Case

Coding & Debugging

For code generation, refactoring, or debugging, prioritize models known for strong reasoning and code accuracy over raw speed. These tend to cost more per token, but the reduction in back-and-forth corrections usually pays for itself.

Chat & Customer-Facing Apps

For chatbots or support widgets where response speed and cost matter more than deep reasoning, lighter/faster models are usually the better trade-off users notice latency more than they notice subtle reasoning gaps in casual conversation.

Content & Creative Writing

For blog drafts, marketing copy, or creative writing, look for models with strong language fluency and tone control. Test a couple of options with the same prompt style differences between models are often more noticeable here than in technical tasks.

Data Extraction & Structured Output

If your task is pulling structured data (JSON, tables) out of unstructured text, prioritize consistency over creativity. Smaller, cheaper models often perform well here since the task is narrow and well-defined.

Cost vs. Quality: A Practical Framework

• Prototype cheap: Use lower-cost models while you're still figuring out your prompts and app structure compare rates on the pricing page
• Upgrade selectively: Once your app's core flow is stable, swap in a stronger model only for the specific steps that need it
• Benchmark before committing: Run the same prompt across 2-3 candidate models using the model evaluator, or check the model leaderboard for comparative rankings

How to Switch Models

You can test different models directly in the free public chat without writing any code, or change the "model" field in your API request once you've decided:

curl https://api.velona.in/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-3-5-sonnet",
    "messages": [{"role": "user", "content": "Summarize this article..."}]
  }'

Quick Reference Cheat Sheet

Task	Priority
Coding	Reasoning accuracy
Chatbots	Speed + cost
Creative writing	Fluency + tone
Data extraction	Consistency

Not sure where to start? Check the full model pricing index or the leaderboard, or read our getting started guide if you haven't made your first API call yet.