Zed v1.21.0

Zed v1.21.0 was released on .

Summary

AI - Added SuperGrok sign-in so SuperGrok subscribers can use Grok models in the Agent Panel. (63248; thanks thibaudgg) - Added the agent.preventidlesleep setting, enabled by default, to prevent id...

Release Context

  • This was the 95th Zed release of 2026 tracked by Havoptic.
  • It shipped 6 days after Zed v1.20.2 (September 17, 2026).

Shipped around the same time

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Release Notes

AI - Added SuperGrok sign-in so SuperGrok subscribers can use Grok models in the Agent Panel. (63248; thanks thibaudgg) - Added the agent.preventidlesleep setting, enabled by default, to prevent idle system sleep while agent threads are running. (53130; thanks cppcoffee) - Added support for DeepSeek Flash 4.1. (64014; thanks cppcoffee) - Added the agent.threadssidebardefaultwidth setting to configure the width of the Threads Sidebar. (62883; thanks porada) - Added the agent: rename selected thread action for renaming the active Terminal Thread from the Agent Panel. (63660; thanks mauriciord) - Added BYOK support for Claude Opus 5.5 with an Anthropic API key. (64627) - Added BYOK support for GPT-6 Sol and GPT-6 Luna with an OpenAI API key. (64628) - Added BYOK support for GPT-6 Astra with an OpenAI API key. (64420) - Added Z.ai GLM to the Mistral provider. (63535; thanks ummon-v) - Improved ACP compatibility and async task wakeup handling. (64077) This week's release includes faster rendering in syntax-highlighted files and Markdown code blocks, a language server command picker, a setting that keeps your system awake during long-running agent turns, and BYOK support for Claude Opus 5.5 (Anthropic) and GPT-6 Astra, Sol, and Luna (OpenAI). Features Git - Added Cut, Copy, and Paste context menu actions to the commit message editor. (64142; thanks hooch) Languages - Added a language server command picker and support for language servers to open files and URLs with showDocument requests. (63607) - Added a prompt to install the Emmet extension when opening files in Emmet-supported languages. (63750) - Added support for running language-server actions directly from actionable inlay hints. (63605) - Improved rendering performance for Markdown code blocks in the Agent Panel, hover popovers, and Markdown preview. (63138) - Improved development extension compilation by automatically replacing outdated WASI SDK installations. (63816; thanks jkbz64) Other - Added a commentemptylines parameter to the editor::ToggleComments keybinding action for multiline selections. Set it to true to comment blank lines or false to skip them; Zed's default keymap now uses true, while the VS Code keymap uses false. (63961; thanks UdeshyaDhungana) - Added editor.codelens.foreground for customizing CodeLens text independently. (64084; thanks giorgiopogliani) - Added support for "..." in readonlyfiles so project settings can extend inherited read-only patterns. (64222; thanks porada) - Added menu (Linux and Windows) and shift-f10 (all platforms) shortcuts to open the context menu for the selected Project Panel entry. (46744; thanks CCXLV) - Improved editor rendering performance in syntax-highlighted files, especially with the minimap enabled. (63145) Bug Fixes - Fixed a bug where folders remained highlighted after they stopped being dragged. (64038; thanks tidely) - Fixed the macOS traffic light animation when exiting fullscreen. (64339; thanks tidely) - Fixed a bug where restored macOS windows reopened on the currently active Space instead of their original Space. (58886; thanks tnayuki) - Fixed auto-compaction thresholds for GitHub Copilot models with a prompt limit below their context window. (64195) - Fixed the Inline Assistant failing to select an available fallback model when no default model was configured. (63963; thanks hferreiro) - Fixed a bug on macOS where moving the pointer over another app could trigger hover effects in a Zed window underneath it. (64234) - Fixed a bug where deleted files appeared outside the file tree in the Outline Panel when viewing a diff. (63570; thanks FrantisekGazo) - Fixed a crash during Python interpreter discovery when an executable emitted non-UTF-8 output. (64040) - Fixed a crash when pasting in an expanded deleted diff hunk in Helix mode. (64245) - Fixed a Linux startup crash when local XKB keyboard-definition files were unavailable. (64113) - Fixed Anthropic credit exhaustion being classified as a malformed request instead of a payment issue. (63988) - Fixed canceled external file drags on Linux Wayland sometimes remaining active and causing later clicks to copy the dragged file. (64122; thanks itsfuad) - Fixed compilation of development extensions on Windows ARM64. (63816; thanks jkbz64) - Fixed compilation of development extensions with large Tree-sitter grammars. (63816; thanks jkbz64) - Fixed data-retention consent checks for hosted counting and compaction requests. (64194) - Fixed diff statistics to use the theme's version-control colors for added and deleted line counts. (64083; thanks kvechkanov) - Fixed font suggestions listing unavailable fallback fonts and internal font aliases. (64095) - Fixed intermittent "database is locked" errors when sharing a database across Zed instances. (63923; thanks whitecat1331) - Fixed Ollama being unable to access images returned by tool calls. (64121; thanks marius851000) - Fixed Python decorator syntax highlighting conflicting with the matrix multiplication operator. ([58077](https://github.com/zed-industries/zed/...

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