Choose the model Claude Tag uses changedclaude-tag/users/models
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3434@Claude use Sonnet for this thread, and make it the default model for this channel.
3535```
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37Claude sets the channel's default model. New threads in the channel start on it. If you asked for a family rather than a version, the default keeps following that family: when your organization gets a newer model in it, new threads start on the newer model without anyone changing the setting. A thread already underway switches to it at the next message anyone posts there, unless someone in that thread has already had Claude switch models. If an Owner or a [Claude Tag admin](/docs/claude-tag/admins/restrict-access#delegate-claude-tag-administration) has set **Channel member edits** to **Block** for the channel, Claude declines to set the channel default; ask for the thread alone instead.
37Claude sets the channel's default model. New threads in the channel start on it. If you asked for a family rather than a version, the default keeps following that family: when your organization gets a newer model in it, new threads start on the newer model without anyone changing the setting. A thread already underway switches to it at the next message anyone posts there, unless someone in that thread has already had Claude switch models. If an Owner or a [Claude Tag admin](/docs/claude-tag/admins/restrict-access.md#delegate-claude-tag-administration) has set **Channel member edits** to **Block** for the channel, Claude declines to set the channel default; ask for the thread alone instead.
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39An Owner sets the same default in Claude Tag admin settings for the whole organization or for one workspace or channel, and a Claude Tag admin can set it for a workspace or channel; see [choose the model for a scope](/docs/claude-tag/admins/customize#choose-the-model-for-a-scope).
39An Owner sets the same default in Claude Tag admin settings for the whole organization or for one workspace or channel, and a Claude Tag admin can set it for a workspace or channel; see [choose the model for a scope](/docs/claude-tag/admins/customize.md#choose-the-model-for-a-scope).
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4141## Choose the model for your direct messages
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4949Fast mode gives a thread faster output at a higher cost per token. It's the same [fast mode as in Claude Code](https://code.claude.com/docs/en/fast-mode), and that page lists the models that support it and what it costs. Use it where response time matters more than cost, such as a thread working a live alert.
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51Fast mode is available once an Owner [allows it for your organization](/docs/claude-tag/admins/customize#allow-fast-mode). To turn it on, send the [`!fast` command](/docs/claude-tag/users/commands#turn-fast-mode-on-or-off) in the thread.
51Fast mode is available once an Owner [allows it for your organization](/docs/claude-tag/admins/customize.md#allow-fast-mode). To turn it on, send the [`!fast` command](/docs/claude-tag/users/commands#turn-fast-mode-on-or-off) in the thread.
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5353```text wrap theme={null}
5454@Claude !fast
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6363* You send `@Claude !fast off`
6464* You ask Claude to [switch models](#switch-the-model-in-a-thread)
65* The thread's session is replaced, for example when you [restart it](/docs/claude-tag/users/commands#restart-a-stuck-or-wrong-context-session)
65* The thread's session is replaced, for example when you [restart it](/docs/claude-tag/users/commands.md#restart-a-stuck-or-wrong-context-session)
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6767After `!fast off`, a thread that Claude switched to Opus stays on Opus. To return to the earlier model, ask Claude to switch.
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7979If you ask for a model that isn't on the list, Claude tells you it isn't available, and the thread stays on the model it was already using.
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81For how your organization's model settings apply in Slack, see [Models your organization allows](/docs/claude-tag/admins/customize#models-your-organization-allows).
81For how your organization's model settings apply in Slack, see [Models your organization allows](/docs/claude-tag/admins/customize.md#models-your-organization-allows).
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8383## Related resources
8484
85* [Get started](/docs/claude-tag/users/getting-started): what else the reply footer links to
86* [Commands](/docs/claude-tag/users/commands#turn-fast-mode-on-or-off): where `!fast` works and what Claude replies when it can't change the speed
87* [Customize Claude Tag](/docs/claude-tag/admins/customize#choose-the-model-for-a-scope): how admins set a default model per workspace or channel, and how the organization's model policy applies
85* [Get started](/docs/claude-tag/users/getting-started.md): what else the reply footer links to
86* [Commands](/docs/claude-tag/users/commands.md#turn-fast-mode-on-or-off): where `!fast` works and what Claude replies when it can't change the speed
87* [Customize Claude Tag](/docs/claude-tag/admins/customize.md#choose-the-model-for-a-scope): how admins set a default model per workspace or channel, and how the organization's model policy applies
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