API & Backend
SSE vs WebSockets in FastAPI: Real-Time Communication for AI Applications
Compare Server-Sent Events (SSE) and bi-directional WebSockets for LLM token streaming, financial feeds, and interactive chat backends.
3 min
Why SSE Is the De Facto Standard for LLM Output Streaming
For one-way server-to-client token streams (like ChatGPT completions), SSE is superior to WebSockets because it operates over standard HTTP/2, supports automatic reconnection, and bypasses proxy firewall restrictions.