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[FEATURE]: Support for Claude Opus 4.6 Fast Mode #8950

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opened 2026-02-16 18:11:14 -05:00 by yindo · 1 comment
yindo commented 2026-02-16 18:11:14 -05:00
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Originally created by @Tetrahedrite on GitHub (Feb 10, 2026).

Originally assigned to: @thdxr on GitHub.

Feature hasn't been suggested before.

  • I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

First, thank you for maintaining this project. I really appreciate all your work.

I wanted to bring to your attention that both Anthropic and GitHub Copilot have recently announced experimental support for Fast Mode with the Claude Opus 4.6 model. I would love to see this capability available in OpenCode, but it doesn’t appear that such a feature or commit exists yet, and I haven’t seen any related issue requests.

It would be fantastic if this functionality could be supported.

Thank you!

Originally created by @Tetrahedrite on GitHub (Feb 10, 2026). Originally assigned to: @thdxr on GitHub. ### Feature hasn't been suggested before. - [x] I have verified this feature I'm about to request hasn't been suggested before. ### Describe the enhancement you want to request First, thank you for maintaining this project. I really appreciate all your work. I wanted to bring to your attention that both [Anthropic](https://code.claude.com/docs/en/fast-mode) and [GitHub Copilot](https://docs.github.com/en/copilot/reference/ai-models/supported-models#model-multipliers) have recently announced experimental support for Fast Mode with the Claude Opus 4.6 model. I would love to see this capability available in OpenCode, but it doesn’t appear that such a feature or commit exists yet, and I haven’t seen any related issue requests. It would be fantastic if this functionality could be supported. Thank you!
yindo added the discussion label 2026-02-16 18:11:14 -05:00
yindo commented 2026-02-16 18:11:14 -05:00
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@github-actions[bot] commented on GitHub (Feb 10, 2026):

This issue might be a duplicate of existing feature requests. Please check:

  • #12323: [FEATURE]: Add support of Claude Opus 4.6 - General Opus 4.6 model support
  • #12504: [FEATURE]: Add Claude Opus 4.6 support for GitHub Copilot provider - Specifically addresses Opus 4.6 for GitHub Copilot
  • #12485: Support adaptive thinking for Claude Opus 4.6 - Related Opus 4.6 feature

Fast Mode is a specific capability of Opus 4.6. Once Opus 4.6 support is added (especially for GitHub Copilot), the Fast Mode feature would likely be available as part of that implementation.

@github-actions[bot] commented on GitHub (Feb 10, 2026): This issue might be a duplicate of existing feature requests. Please check: - #12323: [FEATURE]: Add support of Claude Opus 4.6 - General Opus 4.6 model support - #12504: [FEATURE]: Add Claude Opus 4.6 support for GitHub Copilot provider - Specifically addresses Opus 4.6 for GitHub Copilot - #12485: Support adaptive thinking for Claude Opus 4.6 - Related Opus 4.6 feature Fast Mode is a specific capability of Opus 4.6. Once Opus 4.6 support is added (especially for GitHub Copilot), the Fast Mode feature would likely be available as part of that implementation.
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Reference: anomalyco/opencode#8950
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