What does MongoDB Atlas Vector Search cost in 2026?

Atlas Vector Search is included on M10+ dedicated clusters at no extra query cost. The infrastructure cost is the Atlas tier itself (M10 starts around $57 per month, M30 around $370 per month) plus storage for embedding vectors (roughly 6KB per 1536-dimension vector). Adding vector search to an existing M30 cluster with 1 million documents typically adds $50 to $150 per month in storage. Embedding generation via OpenAI text-embedding-3-small costs $0.02 per million tokens (embed 1 million help docs for approximately $10). Total cost of ownership is dramatically lower than running a separate Pinecone or Weaviate cluster alongside Atlas.