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Streaming LLM Tokens to the Browser: The Production SSE Setup

Published on June 5, 2026By DEV Community

A spinner is a lie. It tells the user something is happening without telling them what. When spectr-ai generates a security report, the LLM produces text token by token over 15 to 40 seconds. If I wait for the full response and then drop it on the page, the user stares at nothing the whole time. If I stream each token as it arrives, the report writes itself in front of them, exactly like ChatGPT. Same wait, completely different feel. A while back I covered SSE for progress bars: the server sends

Read the full article: https://dev.to/pavelespitia/streaming-llm-tokens-to-the-browser-the-production-sse-setup-knh

Source: DEV Community