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wire 2026-07-28
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Open WebUI 0.11.0 ships redesigned interface, orjson performance lift, and a critical tool-call fix

By RepoJournal · Filed · About Open WebUI

Open WebUI 0.11.0 brings a redesigned interface, and a critical fix ensures system prompts stay intact during multi-turn tool calls when memories are enabled.

The major event is Open WebUI 0.11.0, a ground-up visual rebuild. The release notes describe a "Redesigned interface" with all aspects of the UI remade, from chat view to admin panel, including a narrower conversation column, lighter typography, and consistent menus and dropdowns [1]. This is the headline release, landing in the main open-webui repository [2]. Previously, the native tool-call loop ran generate_chat_completion with bypass_system_prompt=True, causing the provider layer to skip re-applying the model's default system prompt on tool calls. The fix preserves the system prompt across tool calls when memories are enabled, restoring it correctly after RAG injection [3]. This matters for users with memories enabled who rely on a custom system prompt. Performance work also landed: a new orjson-backed codec replaces stdlib json for Socket.IO packet, pub/sub, and Redis pool JSON handling. Every emit is now JSON-encoded once for the Redis pub/sub channel, decoded by replicas, and packet-encoded per client; the benchmark identified stdlib json as the dominant CPU cost on WebSocket workers in multi-replica deployments [4]. This touches SESSION_POOL, USAGE_POOL, and YdocManager paths.

Quick answers

What shipped in Open WebUI on July 28, 2026?
Open WebUI 0.11.0 brings a redesigned interface, and a critical fix ensures system prompts stay intact during multi-turn tool calls when memories are enabled. In total, 79 commits, 18 pull requests, and 1 releases landed.
Who contributed to Open WebUI on July 28, 2026?
3 developers shipped this update, including Classic298, github-actions[bot], and tjbck.
What were the notable Open WebUI updates?
v0.11.0, 0.11.0, and fix: preserve system prompt across tool calls when memories are enabled (#26857).