Independent math learners
Get hints and visual guidance at the moment a concept or interactive problem stops making sense.
Independent tool overview
Koji by Brilliant at a glance
Koji is Brilliant's built-in AI tutor for math and coding, designed to see a learner's current interactive problem and guide the reasoning without simply revealing the answer.
Visit the official Koji by Brilliant site ↗
- Product type
- In-course AI tutor
- Core subjects
- Math and coding
- Full access
- Included with Brilliant Premium
- Free access
- Limited Koji preview
- Last reviewed
- August 28, 2026
Overview
What Koji by Brilliant is
Koji is not a standalone homework-answer chatbot. It lives inside Brilliant's interactive courses, where it can see the problem, the on-screen controls, and what the learner has already tried. That context lets it respond to the actual point of confusion instead of starting from a pasted question.
Its teaching style is deliberately Socratic: Koji asks questions, gives visual or spoken guidance, and can annotate or manipulate the lesson environment. The goal is to help the learner make the next reasoning step rather than provide a completed solution to copy.
Koji is strongest for self-directed learners using Brilliant's structured math and coding curriculum. It is less suitable when someone needs help with an arbitrary school assignment, a live human relationship, formal course credit, or coverage outside Brilliant's supported lessons.
Use cases
Who Koji by Brilliant is best for
The strongest fit depends on the job you need the product to complete, not the size of its feature list.
Beginning coders
Work through programming logic, Python, functions, algorithms, data structures, and related foundations inside a guided curriculum.
Parents and homeschool families
Give a learner in-context help without requiring the parent to reteach every math or coding concept.
Curious adult learners
Rebuild confidence in quantitative topics through short, hands-on lessons rather than lecture videos.
Capabilities
Core Koji by Brilliant features
Sees the current problem
Uses the lesson state, interactive elements, prior guesses, and pauses to focus on where the learner may be stuck.
Guides without giving away answers
Asks targeted questions and offers the next useful hint instead of functioning as an answer key.
Visual and interactive help
Can highlight, annotate, rearrange, or add elements within Brilliant's learning environment when a text explanation is not enough.
Spoken support
Can speak at the start of a lesson page and deliver audio guidance, with controls to mute the tutor and its speech bubbles.
Adaptive practice
Brilliant uses learner progress and knowledge gaps to adjust practice and the amount of support Koji provides.
Kid-focused safeguards
Brilliant says Koji stays on the learning topic, uses safety filters, and relies on zero-data-retention processing for third-party chat and audio services.
Process
How the Koji by Brilliant workflow works
Step 1
Choose a Brilliant course
Start in a supported math or coding course at the learner's current level.
Step 2
Attempt the interactive problem
Work with the visual controls, code, or answer interface so Koji can use the attempt as context.
Step 3
Ask Koji when stuck
Open the tutor and explain the confusion, or respond when Koji notices a useful teaching moment.
Step 4
Reason through the hint
Use Koji's question, annotation, alternate explanation, or intermediate problem to make another attempt.
Step 5
Practice independently
Move into practice sets where scaffolding is reduced and check whether the concept can be applied without tutor help.
Cost
Koji by Brilliant pricing and free plan
Brilliant Free includes two lessons or practice sets per day and a limited Koji preview. Current U.S. web pricing for full Premium access is $30 monthly or $240 annually; regional, platform, and family pricing can vary.
Free
$0
Try Brilliant's content and a limited preview of Koji.
- Two lessons or practice sets per day
- Sequential course progression
- Occasional ads
- Limited Koji preview
Monthly Premium
$30/month
Full access with month-to-month billing in the United States on the web.
- Unlimited Koji access
- Unlimited lessons and practice
- Open course navigation
- Ad-free experience
Annual Premium
$240/year
The same Premium access at an effective $20 per month when paid annually.
- Unlimited Koji access
- Web, iOS, and Android
- One annual payment
Family and educators
Varies
A Family Plan covers up to six members, while eligible K-12 educators and students may receive Premium free.
- Check current regional Family Plan pricing
- Separate account and progress for each family member
- Educator eligibility and application requirements apply
Pricing checked . Check current pricing at the source ↗
Assessment
Koji by Brilliant strengths and limitations
Where it stands out
- Uses the actual lesson and attempt state instead of requiring the learner to restate the entire problem.
- Pairs conversation with visual, interactive, and audio guidance.
- Its no-answer-first design encourages another attempt rather than copying.
- Full Koji access is bundled with a broad interactive curriculum instead of sold per tutoring session.
- Supports web, iOS, and Android learning.
What to consider
- Koji is tied to Brilliant's curriculum and is not yet a general tutor for any outside homework assignment.
- Coverage is strongest in foundational math and coding; Brilliant says some advanced-course support is still being added.
- It cannot provide the long-term human relationship, school coordination, or accountability of a consistent live tutor.
- Brilliant does not issue school grades, transcripts, diplomas, or professional credentials.
- Like any AI-assisted system, its guidance should not be treated as infallible despite Brilliant's accuracy and safety controls.
Compare
Koji by Brilliant alternatives
The right alternative depends on the specific output, workflow, controls and budget your project requires.
Educators
Khanmigo
Consider Khanmigo for AI-guided learning connected to Khan Academy's broader school-subject curriculum.
Explore Khanmigo →Students
Homework Checker
Consider Homework Checker when the immediate need is feedback on a specific submitted assignment rather than a full course.
Explore Homework Checker →Business Operations
ChatGPT
Consider ChatGPT for a general-purpose conversational tutor that can discuss material outside one learning platform.
Explore ChatGPT →Questions
Koji by Brilliant FAQs
What is Koji by Brilliant?
Koji is an AI tutor built into Brilliant's interactive math and coding courses. It sees the problem and the learner's attempt, then provides questions, hints, visual guidance, or alternate explanations.
Does Koji give students the answer?
Koji is intentionally designed to guide the learner without simply handing over the answer. Its prompts and visual interventions are meant to support another independent attempt.
How much does Koji cost?
Free users receive a limited Koji preview. Full unlimited access is included with Brilliant Premium, currently $30 monthly or $240 annually on the U.S. web plan. Prices can differ by region or app platform.
Which subjects does Koji cover?
Koji is available in most Brilliant courses, with the strongest current coverage across foundational math and coding. Brilliant says support for additional advanced courses is continuing to expand.
Is Koji safe for children?
Brilliant says Koji stays on topic, uses model safety filters and live alerts, and sends chats and audio to third-party services with zero-data-retention terms. Brilliant is also kidSAFE and COPPA certified.
Can Koji help with school homework?
Its current strength is tutoring inside Brilliant lessons. Brilliant has announced plans to expand toward school assignments, but families should not assume arbitrary homework support is already available.
Bottom line
Our Koji by Brilliant verdict
Koji is one of the more thoughtfully constrained AI tutors because it is embedded in a real interactive curriculum and is designed to make the learner keep thinking. It offers good value for people who will use Brilliant regularly, but it is not a replacement for every subject, outside homework help, formal school credit, or a human tutor.
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