Changes

• Tool call confirmation: Add inline approve/reject/always-approve buttons that appear before each tool call is executed. Enable via the new "Confirm tool calls" checkbox in the Chat tab.
• Stdio MCP server support: In addition to HTTP MCP servers, you can now configure local subprocess-based MCP servers via user_data/mcp.json, using the same format as Claude Desktop and Cursor. [Tutorial]
• preserve_thinking chat template parameter: New UI checkbox and --preserve-thinking CLI flag to control whether thinking blocks from prior turns are kept in the context.
• UI: Sidebars overhaul: Sidebars now toggle independently and persist their state on page refresh. Default visibility adapts to viewport width.
• llama.cpp: Pass --draft-min 48 by default for draftless speculative decoding.
• Only show the "Reasoning effort" and "Enable thinking" controls for models whose chat template actually uses them.
• Cache MCP tool discovery to avoid re-querying servers on each generation.
• Add model download branch handling in download_model_wrapper (#7506). Thanks, @Th-Underscore.
• UI: Improve border colors in light theme, fix code block copy button colors and centering, fix code block scrollbar flash during page load, improve past chats menu spacing.

Security

• Fix SSRF vulnerabilities in URL fetching: add backslash and userinfo rejection, validate every redirect hop.

Bug fixes

• Fix Gemma 4 thinking tags not hidden after tool calls (#7509).
• Fix GPT-OSS channel tokens leaking in UI after tool calls.
• Fix Slider preprocess not handling None from cleared number input. 🆕 - v4.6.1.
• llama.cpp: Fix multimodal by using server's random media marker. 🆕 - v4.6.1.

Dependency updates

• Update llama.cpp to ggml-org/llama.cpp@6217b49
• Update ik_llama.cpp to ikawrakow/ik_llama.cpp@286ce32
• Update ExLlamaV3 to 0.0.30

Portable builds

Below you can find self-contained packages that work with GGUF models (llama.cpp) and require no installation! Just download the right version for your system, unzip/extract, and run.

Windows

Linux

macOS

Updating a portable install:

1. Download and extract the latest version.
2. Replace the user_data folder with the one in your existing install. All your settings and models will be moved.

Starting with 4.0, you can also move user_data one folder up, next to the install folder. It will be detected automatically, making updates easier:

text-generation-webui-4.0/
text-generation-webui-4.1/
user_data/                    <-- shared by both installs