Choosing the Right AI Provider: Vertex AI vs OpenRouter vs DeepSeek
April 15, 2026 • 6 min read
One of Indexu's key features is provider flexibility. But which AI provider should you actually use? Here's a practical comparison.
Google Vertex AI (Gemini)
Best for: Enterprise deployments, Google Cloud users, voice AI
Pros:
- Excellent performance on complex reasoning
- Native voice support with Gemini Live
- Strong multilingual capabilities
- Enterprise security and compliance
- Generous free tier for testing
Cons:
- Requires Google Cloud account setup
- More complex authentication
- Higher cost at scale than some alternatives
Pricing: ~$0.075 per 1M input tokens, ~$0.30 per 1M output tokens (Gemini 1.5 Flash)
OpenRouter
Best for: Flexibility, accessing multiple models, experimentation
Pros:
- Access to 100+ models through one API
- Simple API key authentication
- Easy to switch between models
- Competitive pricing with automatic routing
- Great for A/B testing different models
Cons:
- Additional latency from routing layer
- Dependent on third-party availability
- Less control over specific model versions
Pricing: Varies by model, typically pass-through + small margin
DeepSeek
Best for: Cost-conscious deployments, high volume
Pros:
- Extremely competitive pricing
- Strong performance for the cost
- Simple API, easy to integrate
- Good for straightforward customer service
Cons:
- Fewer model options
- Less established than Google/OpenAI
- May have regional latency issues
Pricing: ~$0.14 per 1M input tokens, ~$0.28 per 1M output tokens
Quick Comparison Table
| Factor | Vertex AI | OpenRouter | DeepSeek |
|---|---|---|---|
| Setup Complexity | Medium | Easy | Easy |
| Cost | Medium | Varies | Low |
| Voice Support | Excellent | Via OpenAI | No |
| Enterprise Ready | Yes | Partial | Partial |
| Model Variety | Gemini only | 100+ | DeepSeek only |
Our Recommendations
- Starting out? Use OpenRouter for flexibility while you learn what works
- Need voice? Vertex AI with Gemini Live is the best option
- High volume, cost-sensitive? DeepSeek offers great value
- Enterprise with compliance needs? Vertex AI on Google Cloud
The Indexu Advantage
Because Indexu is provider-agnostic, you're not locked in. Start with one provider, switch to another with a config change. No code modifications, no data migration.
You can even set up fallback providers — if your primary is down or rate-limited, automatically route to a backup.
Not sure which provider to choose?
Request a demo and we'll help you pick the right setup for your use case.