Choosing the Right AI Tool for the Task

Behind the brand names, a few things shape the answer you get back:

• Size: Small, medium or large. Bigger models handle nuance and hard problems better, but they're slower and cost more to run.
• Thinking: Reasoning modes work through a problem step by step before answering. That's great for hard problems and overkill for easy ones.
• Knowledge and data: What the model learned in training, plus whether it can search the web or see your files, email and records.
• Tools: How much the model can read at once, and what it can do—such as running code, editing files or taking actions for you.

Claude's model family shows the size trade-off clearly:

• Haiku (small) is fast and good for quick rewrites and simple questions.
• Sonnet (medium) is the balanced default for most everyday work.
• Opus (large) is best for hard reasoning and long, complex documents, but it's the slowest.

GPT and Gemini have similar tiers under different names.

The same model can do very different things, depending on where you use it.

1. Start small. Try a fast model in plain chat first. If the result is good enough, you're done.
2. Go bigger. If not, switch to a larger model or turn on thinking.
3. Change the tool. If the task needs your files or several steps, move to Copilot for M365 in your app, Gemini Notebook, or Cowork.
4. Build your instinct. Over time, you'll know which tool each task needs.

Consider Copilot Chat when you need to:

• Brainstorm ideas
• Draft emails and communications
• Create agendas or project plans
• Summarize articles or documents
• Generate images
• Research a topic using web information
• Rewrite or improve content
• Practice presentations or interviews

Examples:

• Drafting a department announcement
• Creating a meeting agenda
• Generating ideas for a class assignment
• Summarizing a lengthy article
• Creating an image for a newsletter or presentation

Consider Copilot for M365 when you need to:

• Summarize long email threads
• Prepare for meetings
• Recap meetings and action items
• Draft Word documents
• Analyze Excel data
• Create PowerPoint presentations
• Find information across your Microsoft 365 content
• Perform work using organizational context
• Run in-depth research or data analysis with the Researcher and Analyst agents

Examples:

• "Summarize all emails related to this project."
• "Create a PowerPoint from this Word document."
• "What decisions were made in last week's meeting?"
• "Analyze trends in this Excel spreadsheet."
• "Draft a response based on previous conversations."

Consider Cowork when you need to:

• Build a finished PowerPoint deck or report from your source material
• Prepare a meeting brief from your emails, meetings, and documents
• Create spreadsheets automatically from source information
• Pull data from websites into Excel
• Automate recurring work with scheduled tasks that run in the background
• Set up event-driven tasks that run when something happens, such as a matching email or Teams message
• Create and reuse skills that teach Cowork your team's process
• Connect to other tools, such as Planner, through plugins
• Complete tasks in a web browser
• Use Claude models within Cowork

Why people like it:

• It does the work, not just the advice. You describe the outcome and Cowork plans and executes the steps.
• It knows your context. It draws on the emails, meetings, and files you already have permission to access.
• It saves repetitive effort. Scheduled and event-driven tasks keep routine workflows moving without you.
• You stay in charge. Cowork checks in for approval along the way.

Examples:

• "Prepare a briefing for tomorrow's meeting using my recent emails and the attached documents."
• "Build a PowerPoint from these source files."
• "Create a budget spreadsheet from this project information."
• "Every Monday, summarize my open follow-ups."

Know the limits: Cowork uses a lot of credits.

Cowork is powerful, and that power has a cost. Multi-step tasks use a lot of credits, and each user has a limited number each month. Cowork users currently get 25,000 credits per month, and additional credits are not available. Once your credits run out, you have to wait until the next month to use Cowork again.

That is why the most powerful tool is not the best tool for every job. A quick question, an email draft, or a short summary is better handled in Copilot Chat or Copilot for M365, which saves your Cowork credits for the larger, multi-step tasks where Cowork really pays off.

Consider Gemini when you need to:

• Draft content
• Brainstorm ideas
• Summarize information
• Explore concepts
• Generate outlines
• Compare perspectives
• Work primarily in Google's ecosystem

Examples:

• Developing course content
• Summarizing a research topic
• Creating project outlines
• Generating discussion questions
• Drafting reports or communications

Consider Gemini Notebook when you need to:

• Analyze research papers
• Review meeting materials
• Study course content
• Generate study guides
• Create FAQs
• Produce briefing documents
• Explore connections across multiple sources
• Generate audio or video overviews

Examples:

• Uploading research articles and asking questions
• Creating a study guide from lecture presentations
• Generating a briefing document from committee materials
• Producing an audio overview of a report
• Summarizing multiple PDFs into key findings

Consider Adobe Firefly when you need to:

• Create custom graphics
• Generate marketing visuals
• Design presentation imagery
• Explore creative concepts
• Edit images using natural language prompts
• Develop visual content for communications

Examples:

• Creating a banner for an event
• Designing a newsletter graphic
• Producing concept artwork
• Generating social media visuals
• Creating presentation imagery