Customize Claude Tag changedclaude-tag/admins/customize
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### Allow fast mode
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8282On the Enterprise plan, turning a model off for the whole organization on your **Models** page removes it from the lists in Slack, and Claude declines requests to switch to it. If you turn off the model a scope's **Default model** is set to, Claude still starts sessions there on a fallback model that's still on, and declines only when every fallback is off too. The footer of the first reply names the model that served it.
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84### Allow fast mode
85
86[Fast mode](/docs/claude-tag/users/models#run-a-thread-in-fast-mode) gives a thread faster output at a higher cost per token. Claude in Slack and Claude Code share one fast mode setting, so turning it on allows fast mode in both. The setting is off by default on the Team and Enterprise plans.
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88To allow fast mode, an Owner goes to [**Admin settings > Claude Code**](https://claude.ai/admin-settings/claude-code) and turns on the **Fast mode** toggle under **Capabilities**. Fast mode draws from usage credits, so also turn those on at [**Admin settings > Usage**](https://claude.ai/admin-settings/usage). For an organization billed through AWS Marketplace, the toggle is locked.
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90Turning the toggle on has these effects in Slack:
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92* **Speed**: every session starts at standard speed until someone turns fast mode on for it, and no per-channel setting starts sessions in fast mode
93* **Who turns it on**: any member who can message Claude in a channel can turn fast mode on for a thread there by sending [`@Claude !fast`](/docs/claude-tag/users/commands#turn-fast-mode-on-or-off)
94* **Model**: when a thread is on a model other than Opus, such as Sonnet, `!fast` moves it to the newest Opus model among the [models your organization allows](#models-your-organization-allows), and the thread stays on that model after `!fast off`
95* **Where**: sessions stay at standard speed in a channel that runs with [channel-only access](/docs/claude-tag/admins/restrict-access#how-channel-only-works) because a guest is present, and in a channel shared with another company
96* **Cost**: a channel thread in fast mode bills to your organization like other [channel work](/docs/claude-tag/admins/set-spend-limit#how-claude-tag-usage-is-billed), at the [fast mode rates](https://code.claude.com/docs/en/fast-mode#understand-the-cost-tradeoff)
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8498## Configure the environment for a scope
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86100Claude runs every channel session in a sandbox that starts with a standard set of tools. When a channel's work needs something that sandbox doesn't have, such as a language runtime, a database client, a set of environment variables, or broader web access, give the channel an environment. An environment is an [organization-shared cloud environment](https://code.claude.com/docs/en/cloud-environments#organization-shared-environments): you create it once, then choose it on a scope, meaning a channel, a workspace, or **Default Slack access**. Both steps take an Owner; a [channel manager](/docs/claude-tag/admins/restrict-access#delegate-channel-setup-to-channel-managers) can't change a channel's environment.
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