Claude Fable 5 always thinks and cannot honor a request with thinking disabled, but the cloud models listing gives clients no way to tell it apart from models where thinking is optional (e.g. Claude Opus 4.6): both report `supports_thinking: true` plus the same adaptive effort levels. As a result, the agent panel shows a thinking toggle for Fable even though turning it off isn't actually supported. zed-industries/cloud#2789 adds a `supports_disabling_thinking` field to the models listing. This PR mirrors it through `cloud_llm_client::LanguageModel` (serde-defaulted to `false`, so a server without the field is treated as "don't claim thinking can be turned off") and exposes it as `LanguageModel::supports_disabling_thinking()`, forwarded from the listing by `CloudLanguageModel`. The agent panel now hides the thinking toggle for models that report `false`, showing only the effort selector. The trait default is `true`: every non-cloud provider in the tree treats thinking as toggleable today, and only the cloud listing knows about always-thinking models. Draft until zed-industries/cloud#2789 lands and deploys. Release Notes: - Fixed the agent panel offering a thinking toggle for models that cannot run with thinking disabled.
Zed
Welcome to Zed, a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.
Installation
On macOS, Linux, and Windows you can download Zed directly or install Zed via your local package manager (macOS/Linux/Windows).
Other platforms are not yet available:
- Web (tracking discussion)
Developing Zed
Contributing
See CONTRIBUTING.md for ways you can contribute to Zed.
Also... we're hiring! Check out our jobs page for open roles.
Licensing
Zed source code is licensed primarily under GPL-3.0-or-later, with Apache-2.0 components where marked.
License information for third party dependencies must be correctly provided for CI to pass.
We use cargo-about to automatically comply with open source licenses. If CI is failing, check the following:
- Is it showing a
no license specifiederror for a crate you've created? If so, addpublish = falseunder[package]in your crate's Cargo.toml. - Is the error
failed to satisfy license requirementsfor a dependency? If so, first determine what license the project has and whether this system is sufficient to comply with this license's requirements. If you're unsure, ask a lawyer. Once you've verified that this system is acceptable add the license's SPDX identifier to theacceptedarray inscript/licenses/zed-licenses.toml. - Is
cargo-aboutunable to find the license for a dependency? If so, add a clarification field at the end ofscript/licenses/zed-licenses.toml, as specified in the cargo-about book.
Sponsorship
Zed is developed by Zed Industries, Inc., a for-profit company.
If you’d like to financially support the project, you can do so via GitHub Sponsors. Sponsorships go directly to Zed Industries and are used as general company revenue. There are no perks or entitlements associated with sponsorship.