Gemini vs ChatGPT for Work: Apps, Workspace Fit and Agents

Gemini and ChatGPT are built from the same parts: a chat assistant on the web, desktop and phone, spaces that keep one project’s files and chats together, reusable setups, connections to your other apps, an agent for longer jobs, and a coding agent. Neither is better at everything, and this page makes no benchmark claims. The differences that matter at work are structural. Gemini is built into Google Workspace; ChatGPT reaches Google, Microsoft 365 and Slack through plugins. ChatGPT splits its product into Chat, Work and Codex; Gemini keeps one app and adds an experimental agent, Gemini Spark, on its higher personal plans. Both are retiring their custom-assistant format: Gems are becoming skills, and custom GPTs are becoming plugins. Everything below follows Google’s and OpenAI’s own pages as of September 30, 2026.

Gemini vs ChatGPT at a glance

• Where you use them: both on the web, in desktop apps for Mac and Windows, and in phone apps. Gemini also runs inside Gmail, Docs, Sheets, Slides, Drive, Chat and Meet.
• Modes: ChatGPT has Chat, ChatGPT Work and Codex. Gemini has one app, plus Gemini Spark for agent work.
• Project spaces: ChatGPT projects; Gemini notebooks, shared with Gemini Notebook.
• Reusable setups: Gems turning into skills; custom GPTs turning into plugins.
• Other apps: ChatGPT plugins, which carry apps and skills; Gemini Connected Apps.
• Your own MCP server: ChatGPT developer mode on paid and business plans; Gemini custom apps on eligible US personal accounts.
• Coding: Codex; Gemini CLI, Gemini Code Assist, Jules and Antigravity.

Plans, by name

ChatGPT’s plans are Free, Go, Plus and Pro for individuals, and Business, Enterprise and Edu for organizations. Gemini works without a plan; on a personal account Google AI Plus, Google AI Pro and Google AI Ultra raise the limits and add features, and at work Gemini comes with the Google Workspace edition, from Business Starter up to Enterprise Plus. Features move between plans often, so check each vendor’s plan page rather than a comparison table.

The apps and their modes

OpenAI’s guide to using ChatGPT↗ (opens in a new tab) describes three modes: Chat for back-and-forth, ChatGPT Work to “define an outcome and get a reviewable result” such as a deck or an analysis, and Codex for developer work. One detail matters if you only use Chat: OpenAI’s models page says GPT-6.1 Sol, its recommended model, is available in Work and Codex, not in Chat.

Gemini keeps one app and meets you in more places: the Gemini app, the side panel in each Workspace app, and AI Mode in Google Search. The full Google line-up, from Gemini Notebook to AI Studio, is mapped in Google AI tools.

Projects vs notebooks, GPTs vs Gems

For one piece of ongoing work, ChatGPT has projects and Gemini has notebooks. Both hold sources, instructions and chats. They differ on sharing: in a shared ChatGPT project, members work in the project’s chats as well as its files, so the conversation is the shared record, while Google says a notebook that contains Gemini chats is private and cannot be shared. For the Gemini side, see NotebookLM is now Gemini Notebook; for ChatGPT, ChatGPT projects best practices.

For reusable setups, both vendors are in the middle of a change. Google is replacing Gems with skills, starting in November 2026 on personal accounts, as Gemini Gems explains. OpenAI is moving custom GPTs to plugins↗ (opens in a new tab): a GPT’s instructions become a skill, its files and apps carry over, and custom actions have to be rebuilt with connectors or MCP servers. The dates and steps are in ChatGPT projects vs custom GPTs. If you are building a new reusable assistant today, build it as a skill or a plugin, not as a Gem or a GPT.

Google Workspace, Microsoft 365 and Slack

This is the biggest practical difference. Gemini is part of Google Workspace: it drafts in Gmail and Docs, builds formulas in Sheets and takes notes in Meet, and admins control it with the rest of Workspace. Google’s page on connected apps for work accounts↗ (opens in a new tab) lists what a work account can reach from the Gemini app: Gmail, Calendar, Chat, Docs, Drive, Keep, Tasks and Classroom. Gemini’s Connected Apps list has no Outlook, Teams, SharePoint, OneDrive or Slack entry, and the partners Google added inside Workspace apps in September 2026, such as Asana and Salesforce, do not include them either.

ChatGPT sits outside every office suite and reaches into several. OpenAI’s plugins page↗ (opens in a new tab) names Gmail and Google Drive, Outlook, SharePoint, Teams and OneDrive, Slack and GitHub, with workspace admins deciding which apps people may use. So a Google Workspace company already has Gemini where people type, while a company on Microsoft 365, or one that lives in Slack, gets more reach from ChatGPT. What each ChatGPT app can read and change is in ChatGPT connectors and apps.

Agents: ChatGPT Work and Gemini Spark

Both have an agent that takes an outcome rather than a prompt. ChatGPT Work runs in the cloud and, through the desktop app, on your own files and apps; it can repeat work on a schedule, and it pauses for review when a task needs it. How it compares with Anthropic’s agent is in ChatGPT Work vs Claude Cowork.

Google’s page on Gemini Spark↗ (opens in a new tab) calls it a personal AI agent that automates workflows and runs scheduled or event-triggered tasks, using Connected Apps, skills and a browser. Google labels it an experimental feature in early development. For now it needs a personal account on Google AI Pro or Ultra, age 18 or over and Keep Activity on, and it is not offered in the EEA, the UK, Switzerland or Nigeria. It asks for confirmation before sending messages, changing your data, buying things or submitting forms. The address of Google’s older Gemini Agent help page now opens the Spark page.

Adding your own tools over MCP

Both can take a remote MCP server of your own, with different reach. ChatGPT’s developer mode is available on the web to Pro, Plus, Business, Enterprise and Education accounts, and OpenAI marks it as elevated risk, meant for people who know how to test an app safely. Gemini’s custom apps take an MCP server URL only on a personal account, for people 18 or over in the US, in English, with Keep Activity on; Gemini asks for confirmation before any write. A Workspace account cannot add one in the Gemini app.

Data controls

• ChatGPT, personal plans: OpenAI’s help center says eligible personal accounts can turn off “Improve the model for everyone” under Data Controls, and temporary chats are not used to improve its models.
• ChatGPT, Business and Enterprise: OpenAI’s data governance guide↗ (opens in a new tab) says business customer content is not used for training by default, and Enterprise owners can set a retention period of at least 90 days.
• Gemini, personal accounts: with Keep Activity off, and no feedback sent, future chats are not used to improve Google’s models; with it on, a subset of chats is reviewed by people after being disconnected from your account.
• Gemini, Workspace accounts: Google says submissions are not used to train models and are not reviewed by humans.

Coding, briefly

OpenAI’s coding agent is Codex, in a CLI, editors and the cloud. Google’s is split: Gemini CLI in the terminal, which since June 18, 2026 needs an API key, Vertex AI or a company Code Assist license; Gemini Code Assist in the IDE; Jules for delegated cloud tasks; and Antigravity for individual developers. See Gemini CLI vs Claude Code vs Codex CLI and Google Jules vs Codex.

Gemini or ChatGPT? Pick by job

• Drafting and summarizing inside Gmail, Docs, Sheets and Meet: Gemini.
• Work spread across Outlook, Teams, SharePoint or Slack: ChatGPT with plugins.
• A small group that wants to work in the same conversations: a shared ChatGPT project.
• Answers only from a fixed set of sources, with Audio Overviews: Gemini Notebook.
• A job that ends in a reviewed file, such as a board deck: ChatGPT Work, or Gemini Spark on an eligible personal plan. Try both.
• Connecting your own tool on a work account: ChatGPT developer mode on Business or Enterprise.
• Code changes: Codex, or Gemini CLI and Antigravity. Neither chat.

For the other pairings, see Claude vs Gemini and Claude vs ChatGPT, and for the wider field, ChatGPT alternatives.

Keeping one list both can reach

When a team uses both, the list of work belongs in neither. fenbs is a task board that assistants reach over MCP: ChatGPT as a developer-mode app where the plan allows it, and Gemini through Gemini CLI or, on an eligible personal account, a custom app. Each signs in through the browser and holds your role on the board. Tasks are features, enhancements or bugs with a note, a plan and a priority from 1 to 10, moving through To Do, Next Up, In Progress and Completed, and History records which assistant changed what. fenbs has no due dates, sprints or assignee field, sets no MCP tool annotations yet, and Gemini in Workspace cannot connect to it.