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Google Gemini vs pgvector
Side-by-side comparison of Google Gemini and pgvector.
Quick summary
Google Gemini — Google's multimodal AI with massive context windows. Google's Gemini family (Gemini 2.0 Flash, 1.5 Pro) is a multimodal LLM with up to 2M token context, deep integration with Google Cloud and Vertex AI, and competitive pricing.
pgvector — Vector similarity search for Postgres. pgvector is an open-source Postgres extension that adds vector similarity search to any Postgres database. Runs anywhere Postgres runs (Supabase, Neon, RDS).
Feature comparison
| Feature | Google Gemini | pgvector |
|---|---|---|
| Pricing model | Freemium | Free |
| Starting price | Free tier + pay | Free (just Postgres) |
| Free tier | Yes | Yes |
| Open source | No | Yes |
| Vision | Yes | — |
| Streaming | Yes | — |
| Embeddings | Yes | — |
| Max Output | 8K | — |
| Fine-tuning | Yes | — |
| Context Window | 2M | — |
| Flagship Model | Gemini 1.5 Pro | — |
| Reasoning Model | Gemini 2.0 Flash Thinking | — |
| Function Calling | Yes | — |
| EU Data Residency | Yes | — |
| Type | — | Postgres extension |
| Free Tier | — | Unlimited |
| Serverless | — | No |
| Self-hosted | — | Yes |
| Multi-tenant | — | Yes |
| Hybrid Search | — | Yes |
| Max Dimensions | — | 16000 |
| Metadata Filtering | — | Yes |
Google Gemini
Google's multimodal AI with massive context windows
Pros
- Massive 2M token context window
- Free tier for evaluation
- Native multimodal (audio, video, image)
- Cheapest flagship model
Cons
- Quality variance vs GPT-4o/Claude
- Safety filters can be aggressive
- Google Cloud integration can be overwhelming
pgvector
Vector similarity search for Postgres
Pros
- Use your existing Postgres
- No new infrastructure
- Transactional guarantees with vectors
- Free — pay only for Postgres
Cons
- Slower than purpose-built vector DBs at scale
- Index build times grow with data
- Not ideal for 100M+ vectors
Which should you choose?
Choose Google Gemini if a free tier is important for your stage. Choose pgvector if you value open source and want the option to self-host, and a free tier is important for your stage.