Claude Tag vs OpenTag vs ChatGPT Agents in Slack
Claude Tag, OpenTag, and ChatGPT Agents all put a shared AI agent in your Slack channels, but you buy and govern them differently. Claude Tag needs a Claude Team or Enterprise plan and bills channel work by usage to your organization. OpenTag is a standalone Slack app priced on shared credits, from $50 a month. ChatGPT Agents needs a paid Slack plan plus ChatGPT Business, Edu, or Enterprise, and each agent is built in ChatGPT before it is deployed to a channel. The short version: pick the one that matches what your company already pays for and who should be allowed to direct the agent.
What are Claude Tag, OpenTag, and ChatGPT Agents?
Claude Tag is Anthropic's way of putting Claude to work in Slack. You tag @Claude in a channel and it takes on the task under its own identity, using tools an admin connected for that channel. It is in beta on Team and Enterprise plans (Claude Help Center).
OpenTag is an AI coworker for Slack from Open Curiosity, Inc. (Y Combinator). It routes each task to one of more than 40 models, works only in channels you invite it into, and uses the access of the person asking (OpenTag llms.txt). Microsoft Teams support is listed as coming soon.
ChatGPT Agents is the Slack app for ChatGPT workspace agents. Someone builds an agent in ChatGPT, connects its apps, then deploys it to Slack channels, where it responds to mentions or to all relevant messages and can run on a schedule (OpenAI Help Center). It is a different product from OpenAI dots; see OpenAI dots in Slack for that one.
How do Claude Tag, OpenTag, and ChatGPT Agents compare?
| Claude Tag | OpenTag | ChatGPT Agents | |
|---|---|---|---|
| Who sets it up | A Primary Owner or Owner of your Claude organization (the Admin role cannot) | Whoever installs it in Slack and invites it to channels | An agent builder in ChatGPT; a Slack admin may need to approve the app |
| Who can direct it | By default anyone in the paired Slack workspace; an Owner can restrict it to Claude org members, or to roles on Enterprise | Everyone in a channel OpenTag has joined | People in the channel where an agent is deployed, by mentioning its handle (or it answers all relevant messages) |
| Approvals | Admin-set access per channel and spend limits; you approve use of your personal connectors, and Enterprise admins can require review before results post | Asks before it sends, spends, submits, or purchases; Gmail sends need an explicit Approve & send | App write actions default to Always ask; builders can change this and add action constraints |
| Pricing model | Channel work bills by usage to an org balance under an Owner-set spend limit; no per-seat charge for Slack users | Shared credits, not seats: from $50 / month for 10,000 credits; 7-day trial, card required | ChatGPT Business seats from $25 / user / month (or $20 annual), minimum 2 seats; agent runs use included agentic usage, then workspace credits |
| Requirements | Claude Team or Enterprise (not Free, Pro, or Max); not for third-party deployments | A Slack workspace | Paid Slack plan, members allowed to create user groups, and ChatGPT Business, Edu, or Enterprise |
| Where it works | Slack | Slack (Teams coming soon) | Slack and ChatGPT; schedules and API triggers |
Last verified: October 25, 2026. Sources: What is Claude Tag, Claude Tag overview, Claude Tag security, Claude Team plan, OpenTag llms.txt, OpenTag approvals, ChatGPT Agents in Slack, ChatGPT workspace agents, ChatGPT Business. Plans change, so check each vendor before you buy.
Who can direct each agent in a Slack channel?
- Claude Tag: the most open by default. Anthropic's overview says Slack users do not each need a Claude seat, and anyone in the paired workspace can tag @Claude in a channel. On Team plans an Owner can limit it to people with a Claude account in the organization. Role-based limits are Enterprise-only.
- OpenTag: everyone in a channel it has joined can give it work, and they all draw from the same credit pool. Integrations belong to the person who connected them, and a tool connected read-only stays read-only.
- ChatGPT Agents: the agent's owner decides which channels it is deployed to and whether it answers only when mentioned. To work in Slack, every app connection on the agent must use shared authentication, and OpenAI warns that if you use your own account for that connection, other people may be able to trigger actions through it (workspace agents).
All three are shared agents. None has the one-owner limit you get with personal agents. If that distinction is new, read personal vs shared AI agents.
How do approvals work before an agent sends or changes something?
OpenTag says it waits for a person before it sends, spends, submits, or purchases anything. Its approvals docs are candid about the limits: a write-capable integration can make changes during a request, not every write produces an approval card, and there is no setting that makes every operation require approval. Gmail sends always need an explicit Approve & send. The firm boundary is connecting a tool read-only.
ChatGPT Agents set app write actions to Always ask by default during a run. The builder can switch some to Never ask, use a custom setting, or add action constraints, for example only allowing email to recipients at your own domain.
Claude Tag leans on access control. In channels, Claude acts under its own service accounts and can reach only the connectors an admin applied to that channel, workspace, or all of Slack. Spend is capped, and work that would exceed a limit is declined. When Claude uses your personal connectors in a channel, you approve that use, and on Enterprise an admin can require your review of every result before it posts (security and data handling).
What does each one cost for a small team?
What you would pay to start:
- Claude Tag: a Claude Team plan (minimum two members; Standard seats are $25 per member per month billed monthly, or $20 billed annually, per the Team plan page), plus Claude Tag usage drawn from a balance an Owner funds.
- OpenTag: $50 a month for 10,000 shared credits, with larger packs up to $2,000 a month. There are no seats.
- ChatGPT Agents: ChatGPT Business Standard seats at $25 per user per month (or $20 annually), with at least two seats. OpenAI's rate card says workspace agent runs have no fixed price, and a typical end-to-end run uses about 5 to 25 credits once included usage runs out.
For the wider picture across seven agents, see AI agent pricing compared.
Which one should you pick?
- Pick Claude Tag if your company is already on Claude Team or Enterprise and you want engineering-style work in Slack: repositories, pull requests, incident threads.
- Pick OpenTag if you want a standalone Slack coworker with one credit bill, a wide integration list, and model choice handled for you.
- Pick ChatGPT Agents if you already pay for ChatGPT Business or Enterprise and want purpose-built agents with explicit write approvals and schedules. Expect more setup: a paid Slack plan, Slack user-group permissions, and shared connections.
If none of those subscriptions is in place and the job is mostly status updates, weekly reports, and handoffs, a smaller tool may be enough.
Where does Geniusly fit?
Geniusly reads authorized Gmail, Google Drive, Google Sheets, Slack, GitHub, Linear, and Google Ads, then prepares a brief, report, or handoff for a person to review. Connected apps are read-only by default, except Google Sheets edits you explicitly ask for, and Slack messages beyond its reply are posted only after your approval. Anyone in an invited channel can ask it for work, it can run a task once, daily, or weekly, and it has a Free plan. It does not send Gmail.
That is narrower than the three above: prepared work to review, not an agent that writes to many systems. For direct comparisons, see Geniusly vs OpenTag and Geniusly vs ChatGPT. If Claude Tag's plan requirement is the blocker, Claude Tag alternatives covers other options.
Frequently asked questions
Do Slack users need a Claude seat to use Claude Tag?
No. Anthropic's Claude Tag overview says Slack users don't each need a Claude seat to work with Claude in channels. Channel work bills by usage to the organization. Your organization still needs a Claude Team or Enterprise plan, and one-to-one DMs run on the sender's own Claude account.
Does OpenTag charge per seat?
No. OpenTag prices on shared credits. Everyone in a channel it has joined draws from the same pool, starting at $50 a month for 10,000 credits. The 7-day trial requires a card.
Can I use ChatGPT Agents in Slack on a free Slack plan?
No. OpenAI's help article lists a paid Slack plan as a prerequisite, along with a ChatGPT Business, Edu, or Enterprise account and Slack permissions that let members create user groups.
Is ChatGPT Agents the same as OpenAI dots?
No. ChatGPT Agents deploys ChatGPT workspace agents that an organization builds and shares. Dots are a separate always-on agent product. See our post on OpenAI dots in Slack for how dots behave there.