Preflight Checklist
What's Wrong?
After the Opus 4.7 release on April 16, 2026, Opus 4.6 is no longer available in the Code tab of the Claude Desktop app (macOS). The only Opus option now resolves to Opus 4.7. There is no way to select or pin Opus 4.6 from the Code tab UI.
This issue is specific to the Code tab. The Claude.ai chat interface and Claude Cowork both still expose multiple model options in their respective model dropdowns. Only the Code tab's model picker has had Opus 4.6 removed.
Additionally, the /model command (documented for Claude Code CLI) does not work in the desktop app's Code tab, so there is no fallback to manually specify claude-opus-4-6 within the desktop interface.
Impact
Opus 4.7 ships with a new tokenizer that can produce up to ~35% more tokens for the same input text. Without the option to fall back to Opus 4.6, usage is being burned significantly faster — particularly for users on plans with message or token quotas. Users should have the ability to choose 4.6 while evaluating the cost/performance tradeoff of the new tokenizer.
Expected Behavior
Opus 4.6 should remain selectable in the Code tab's model picker alongside Opus 4.7, or at minimum, users should have a documented path to pin a specific model version from the desktop app UI — consistent with the CLI's /model claude-opus-4-6 and environment variable options.
Environment
- Claude Desktop version: 1.3109.0
- Platform: macOS
- Affected surface: Code tab only (Claude.ai chat and Cowork are unaffected)
Additional Context
Preflight Checklist
What's Wrong?
After the Opus 4.7 release on April 16, 2026, Opus 4.6 is no longer available in the Code tab of the Claude Desktop app (macOS). The only Opus option now resolves to Opus 4.7. There is no way to select or pin Opus 4.6 from the Code tab UI.
This issue is specific to the Code tab. The Claude.ai chat interface and Claude Cowork both still expose multiple model options in their respective model dropdowns. Only the Code tab's model picker has had Opus 4.6 removed.
Additionally, the
/modelcommand (documented for Claude Code CLI) does not work in the desktop app's Code tab, so there is no fallback to manually specifyclaude-opus-4-6within the desktop interface.Impact
Opus 4.7 ships with a new tokenizer that can produce up to ~35% more tokens for the same input text. Without the option to fall back to Opus 4.6, usage is being burned significantly faster — particularly for users on plans with message or token quotas. Users should have the ability to choose 4.6 while evaluating the cost/performance tradeoff of the new tokenizer.
Expected Behavior
Opus 4.6 should remain selectable in the Code tab's model picker alongside Opus 4.7, or at minimum, users should have a documented path to pin a specific model version from the desktop app UI — consistent with the CLI's
/model claude-opus-4-6and environment variable options.Environment
Additional Context
/modelandANTHROPIC_MODELenv var as model pinning options, but these only apply to the CLI, not the desktop app's Code tab.