ChatGPT Work Models and Modes Explained: Which One Should You Use?

What Is ChatGPT Work?

Regular Chat is designed for questions, conversations, brainstorming, explanations, and shorter drafts.

ChatGPT Work is built for larger tasks with a clear outcome. Instead of only giving you advice about what to create, it can help carry the assignment through to a finished result you can review and use.

For example, you can use ChatGPT Work to:

• Research a topic using multiple sources
• Analyze uploaded files or spreadsheets
• Create presentations, documents, spreadsheets, and PDFs
• Build a content or marketing plan
• Generate and edit images
• Use connected tools and plugins
• Build websites and interactive resources
• Complete recurring or scheduled tasks

According to OpenAI’s ChatGPT Work guide, Work is best suited for substantial assignments that involve multiple steps, sources, tools, or a completed deliverable.

ChatGPT Models and Power Modes Are Not the Same Thing

Inside ChatGPT Work, you may be able to select both a model and a Power setting.

The model determines which version of ChatGPT completes your task.

The Power setting controls how much reasoning, planning, and checking that model uses while completing it.

Think of it like hiring someone to help with your business:

• The model is the person you hire.
• The Power setting is how much time and attention you ask them to give the assignment.

Choosing a stronger model does not automatically mean you need the highest Power setting. You can use a highly capable model on Medium for everyday work or increase it to High, Extra High, or Max when the assignment requires deeper analysis.

GPT-5.6 Sol: Best for Complex and High-Value Work

Sol is the flagship model in the GPT-5.6 family. It offers the strongest overall capability for complex professional work that requires analysis, judgment, research, tool use, or a highly polished result.

Choose Sol when the task is difficult, open-ended, or important enough to benefit from extra depth.

Good uses for Sol include:

• Creating a complete marketing strategy
• Conducting detailed market or competitor research
• Writing a polished, source-backed report
• Analyzing complicated business information
• Reviewing an entire website or brand
• Planning a major product launch
• Building a presentation from several sources
• Solving a difficult technical problem

Sol is the safest starting point when you are not sure which model can handle the assignment. However, simpler tasks may not need its full capability.

GPT-5.6 Terra: Best for Everyday Business Work

Terra is the balanced, everyday model in the GPT-5.6 family. It provides strong reasoning and tool use without requiring Sol’s full depth for every assignment.

Good uses for Terra include:

• Writing blog posts
• Creating email sequences
• Developing content calendars
• Organizing digital products
• Drafting sales-page copy
• Summarizing research
• Comparing business options
• Creating plans from a clear brief
• Repurposing content across multiple platforms

OpenAI describes Terra as a natural starting point for work you may have previously assigned to GPT-5.5.

For creators and small-business owners, Terra will likely be enough for many everyday content, planning, and marketing tasks.

GPT-5.6 Luna: Best for Fast, Clear, Repeatable Tasks

Luna is the fastest and most affordable model in the GPT-5.6 family. It is designed for tasks that are clearly defined, structured, or repeated at a higher volume.

Good uses for Luna include:

• Rewriting captions
• Creating headline variations
• Reformatting information
• Sorting content into categories
• Extracting details from files
• Turning notes into lists
• Creating structured summaries
• Applying the same format to multiple pieces of content
• Producing variations from an approved example

Luna works best when you already know what a good result should look like and can give it clear instructions or an example to follow.

It may not be the best choice for ambiguous strategy, difficult research, or work requiring significant judgment.

GPT-5.5: The Previous-Generation Frontier Model

GPT-5.5 is a previous-generation frontier model designed for complex coding, computer use, research, and professional knowledge work.

It is still a capable model and may remain available in your model selector, particularly if you already use it for established workflows.

Good uses for GPT-5.5 include:

• Research and analysis
• Complex knowledge work
• Reviewing large amounts of information
• Computer-use tasks
• Technical projects
• Existing workflows already built and tested with GPT-5.5

GPT-5.5 is no longer OpenAI’s primary recommended starting point. The newer GPT-5.6 family gives you more specific choices:

• Choose Sol when you need greater depth and polish.
• Choose Terra for balanced everyday work.
• Choose Luna for fast, structured, repeatable assignments.

OpenAI specifically positions Terra as a natural starting point for tasks previously handled by GPT-5.5. There is also no exact one-to-one match between GPT-5.5 and GPT-5.6 reasoning settings, so familiar tasks may require some testing when you switch models.

Quick ChatGPT Model Comparison

Here is the simplest way to compare the available model options. You can also review OpenAI’s latest descriptions in the official ChatGPT model guide.

Now that you have selected the model, the next decision is how much Power to give it.

Light Mode

Light is designed for quick, clearly defined tasks that do not require much analysis.

Use Light when you already know what you want and mainly need ChatGPT to execute it.

Good uses for Light include:

• Rewriting a paragraph
• Creating caption variations
• Correcting grammar
• Summarizing a short document
• Brainstorming names or headlines
• Reformatting information
• Turning notes into a simple list

Light prioritizes speed over deep reasoning. It is ideal when the task is straightforward and the consequences of a small mistake are low.

In some OpenAI interfaces, this setting may be called Low instead of Light.

Medium Mode

Medium balances speed with enough reasoning for most everyday business and content tasks. It is the default starting point OpenAI recommends for general work.

Good uses for Medium include:

• Writing a blog post from a clear outline
• Creating product descriptions
• Drafting an email sequence
• Building a weekly content calendar
• Repurposing an article into social posts
• Organizing a digital product
• Comparing a few clearly defined options

For most creators and small-business owners, Medium can handle the majority of everyday assignments.

If you are unsure which Power setting to choose, start here.

High Mode

High gives ChatGPT more room to plan, analyze, compare information, and check its work.

Use High when the assignment includes multiple steps, several sources, competing priorities, or decisions requiring more judgment.

Good uses for High include:

• Researching and writing a source-backed article
• Creating a 30-day marketing strategy
• Analyzing customer feedback
• Comparing software or business tools
• Reviewing a sales page
• Developing an offer based on market research
• Creating a detailed launch plan

High is helpful when you do not simply need more words—you need better thinking behind the result.

Extra High Mode

Extra High is for difficult or high-value work that needs deeper planning, analysis, and verification.

It can be useful when ChatGPT must work through a large amount of information, connect ideas across several sources, or make recommendations involving meaningful tradeoffs.

Good uses for Extra High include:

• Building a marketing plan from several business documents
• Conducting detailed competitor research
• Creating a polished presentation from multiple sources
• Analyzing a complicated spreadsheet
• Planning a multi-platform product launch
• Reviewing an entire website
• Turning extensive research into a structured report

Extra High may take longer and use more of your available ChatGPT credits, so save it for work that benefits from deeper reasoning.

Max Mode

Max gives the selected model more time to reason through one especially difficult task.

This mode is best reserved for problems where accuracy, depth, and careful judgment matter more than speed or usage.

Good uses for Max include:

• Untangling a complicated business problem
• Auditing a strategy containing conflicting information
• Evaluating a major decision with several risks
• Diagnosing why business data does not match expectations
• Solving a difficult technical or analytical problem
• Pressure-testing an important plan before investing money

Max does not automatically make every piece of content better. A caption, short email, or simple product description usually will not benefit enough to justify it.

Think of Max as one highly capable worker spending more time thinking through one difficult assignment.

Ultra Mode

Ultra works differently from the other Power settings.

Instead of relying on one agent to complete the entire assignment, Ultra can use subagents to divide a larger project into separate parts and work on them in parallel.

For example, if you ask ChatGPT to create a complete digital-product launch, different subagents might separately handle:

• Audience and competitor research
• Offer positioning
• Content planning
• Email strategy
• Launch timeline
• Quality review

ChatGPT then brings those separate pieces together into one result.

Ultra is best for large projects that can be divided into meaningful, independent workstreams. Most everyday assignments do not need it.

Ultra may not appear on every account. Its availability can depend on your plan, platform, settings, and current rollout.

Which Model and Power Setting Should You Use?

Here is a practical starting guide:

These are starting points, not strict rules. A task’s complexity matters more than its length.

A 2,000-word article with a clear outline may only need Terra on Medium. A short business recommendation based on conflicting evidence may require Sol on High or Max.

Does a Stronger Model or Higher Mode Always Give You a Better Answer?

No.

A stronger model and higher reasoning level can improve difficult work, but they may also take longer and use more tokens or ChatGPT credits.

For simple creative tasks, too much reasoning can sometimes produce an answer that is longer, more complicated, or less natural than necessary. More processing is not automatically more useful processing.

Your prompt still matters too.

A well-defined assignment completed by Terra on Medium can produce a better result than a vague assignment given to Sol on Ultra.

ChatGPT still needs to understand:

• What you want created
• Who it is for
• What information it should use
• What it must include
• What it should avoid
• What a successful result looks like

A Simple Prompt Formula for ChatGPT Work

You do not need an overly complicated prompt. Start with this structure:

For example:

That prompt gives ChatGPT an outcome, audience, source, boundaries, format, and definition of done.

The Simplest Way to Choose

If you still do not know which options to select, use this rule:

Choose your model:

• Choose Sol for complex, important, or highly polished work.
• Choose Terra for everyday business, marketing, and content creation.
• Choose Luna for fast, clear, repeatable production tasks.
• Choose GPT-5.5 when continuing an existing workflow built around that previous-generation model.

Choose your Power setting:

• Choose Light for quick execution.
• Choose Medium for everyday business and content creation.
• Choose High when the task requires research, strategy, or several steps.
• Choose Extra High for complex deliverables involving multiple sources.
• Choose Max for your hardest single problem.
• Choose Ultra for a large project that can be divided among multiple agents.

Start with the lowest setting that can reasonably handle the assignment. If the result feels shallow, misses important connections, or requires stronger analysis, move up one level and try again with clearer instructions.