Image from Zed Industries / zed.dev Zed 1.6.3 Adds Fast Mode for AI Models and Better Git Diffs
Zed's stable release on June 10 ships fast mode for Anthropic and OpenAI models, shareable skill links, terminal sandboxing improvements, and a cleaner set of Git diff tools.
Zed 1.6.3 hit the stable channel on June 10. The release touches three areas: AI agent behavior, Git tooling, and general editor quality of life. None of it is a major redesign, but several items fix real friction in day-to-day use.
Fast Mode for Anthropic and OpenAI Models
The biggest agent addition is fast mode. When enabled in the agent panel, it switches to quicker model responses at higher per-token cost — the trade-off is speed versus depth. If you’re iterating quickly through routine edits and don’t need full reasoning overhead, fast mode gets answers back faster.
This covers Anthropic and OpenAI models. Zed also added Claude Opus 4.8 BYOK support in this release, so you can now use your own API key with Opus 4.8 directly.
Shareable Skill Links and Better Skill Management
Agent skills can now be shared via links. The release also adds a symlinked global skill directory, which makes managing skills across multiple projects easier — one directory, referenced everywhere rather than duplicated per project.
A new agent.commit_message_instructions setting lets you customize how the AI generates git commit messages. If your project uses a specific format or wants the AI to include ticket numbers or follow a convention, you can encode that in settings rather than correcting it each time.
Terminal Sandboxing Improvements
The terminal sandbox now supports path-specific write access requests. Instead of the previous all-or-nothing choice — sandbox on or sandbox off — agents can now request write access to specific paths. When an agent needs to write somewhere outside the sandbox, it surfaces a permission prompt showing exactly which paths it wants, in a cleaner file list format.
Terminal output controls also got improvements. Agents can now inspect command output without hiding live terminal progress, so you see what’s happening while a long command runs rather than waiting for it to complete before the agent reports back.
Git Improvements
The Git panel got a solid update:
- File diff tabs: Open a diff for a single file in its own dedicated tab from the Git panel, instead of having to navigate away from the panel.
- Split diff mode in commit history: Toggle split view when browsing commit history.
- Compare with branch: A new “git: compare with branch” action lets you diff against any branch, not just HEAD or the current branch.
- Line counts: The Git panel now shows total added and removed line counts for a changeset. This is a small thing that gives you a quick sense of change size before opening the full diff.
- SHA-256 repository support: Repositories using SHA-256 object format are now supported.
- Improved Git blame performance: Blame annotations load faster.
Other Changes
A few editor improvements round out the release:
- Files can now be opened from the file finder without dismissing the finder itself. This is useful when you want to open several files in quick succession.
- Fuzzy search in the remote projects modal.
- Markdown frontmatter now renders correctly in previews.
- Mermaid diagram rendering got another improvement pass.
- Language model providers can now be configured with custom HTTP headers, useful for organizations routing through proxies or API gateways.
Zed 1.6.3 is available now through the editor’s update mechanism or at zed.dev.
Source: Zed 1.6.3 release notes