You’re staring at a biochemistry problem set due in three hours. The enzyme kinetics question might as well be written in ancient Greek. So you turn to AI for help.
But which AI actually gets STEM answers right?
I spent two weeks testing Unstuck AI and ChatGPT across 47 STEM problems-from organic chemistry mechanisms to differential equations. The results surprised me. Here’s before trusting either tool with your homework.
What Makes STEM Homework Different From Other AI Tasks
STEM problems aren’t like asking AI to write an essay. There’s usually one correct answer, or a specific method you must follow. Get a sign wrong in a physics equation? Your entire solution falls apart.
This is where most AI tools struggle. They’re trained on internet text, not rigorous problem-solving. ChatGPT will confidently walk you through a solution that looks right but contains a subtle error in step three. You won’t catch it unless you already understand the material.
Unstuck AI markets itself specifically for homework help. It claims to show work step-by-step and explain the reasoning. But claims don’t mean much when your grade is on the line.
Testing method: How I Compared Both Tools
I pulled problems from five STEM disciplines:
- Organic Chemistry (12 problems) - Reaction mechanisms, stereochemistry, synthesis routes
- Calculus II (10 problems) - Integration techniques, series convergence, applications
- Physics (9 problems) - Mechanics, electromagnetism, thermodynamics
- Biochemistry (8 problems) - Enzyme kinetics, metabolic pathways, protein structure
For each problem, I graded both tools on three criteria:
- Accuracy: Did they get the right answer? - Method: Did they use the correct approach a professor would expect? - Explanation: Could a confused student actually learn from the response?
I used ChatGPT-4 (the paid version) and Unstuck AI’s standard tier. Same problems, same day, no cherry-picking.
Head-to-Head Results by Subject
Organic Chemistry
ChatGPT: 7/12 correct Unstuck AI: 9/12 correct
Unstuck AI handled reaction mechanisms better. When I asked about an SN1 vs SN2 decision, it correctly identified the tertiary carbon and explained why SN1 would dominate. ChatGPT gave a technically accurate explanation but then proceeded to draw the mechanism incorrectly.
The catch? Unstuck AI’s molecule drawings were clunky. You’ll need to interpret ASCII representations, which gets confusing with complex structures.
Calculus II
ChatGPT: 8/10 correct Unstuck AI: 6/10 correct
ChatGPT actually won this category. Its integration by parts solutions were clean and well-organized. When tackling a tricky trigonometric substitution, it chose the right substitution and carried through without arithmetic errors.
Unstuck AI stumbled on two series convergence problems. It applied the ratio test correctly but made calculation mistakes when simplifying the limit. For pure math, ChatGPT’s computational ability showed its strength.
Physics
ChatGPT: 5/9 correct Unstuck AI: 6/9 correct
Both tools had issues with physics. The pattern I noticed: they handle formula application fine but struggle with problem setup.
One electromagnetism problem required identifying which surfaces contributed to the flux in a Gaussian surface. ChatGPT included a surface that shouldn’t have been counted. Unstuck AI got the setup right but then plugged in the wrong value for the permittivity constant.
My advice for physics homework? Use either tool for the mathematical steps, but set up the problem yourself.
Biochemistry
ChatGPT: 4/8 correct Unstuck AI: 6/8 correct
This gap mattered. Biochemistry combines conceptual understanding with quantitative analysis. Unstuck AI’s explanations of Michaelis-Menten kinetics were genuinely helpful-it broke down what Km and Vmax actually mean before plugging into equations.
ChatGPT knew the formulas but gave generic explanations that wouldn’t help you on an exam. When I asked about competitive inhibition, it provided a textbook definition without connecting it to the graph I’d described.
Statistics
ChatGPT: 7/8 correct Unstuck AI: 7/8 correct
A tie. Both tools handled hypothesis testing well. They correctly identified when to use t-tests versus z-tests and calculated p-values accurately.
The shared weakness? Neither explained why you’d choose a specific test. They assumed you already knew. If you’re learning statistics for the first time, you’ll get the answer but not the understanding.
Overall Accuracy Rates
| Tool | Correct Answers | Accuracy Rate |
|---|---|---|
| Unstuck AI | 34/47 | 72% |
| ChatGPT-4 | 31/47 | 66% |
Unstuck AI edges ahead, but 72% accuracy still means roughly one in four problems has errors. Neither tool is reliable enough to submit answers without checking.
Step-by-Step: How to Use Each Tool Effectively
For Unstuck AI
1 - Upload clear images. Unstuck AI accepts photos of handwritten problems. Make sure your writing is legible and the lighting is good. Blurry images lead to misread variables.
2 - Specify what you need. Don’t just ask for “the answer. " Type something like: “Solve this integral using integration by parts. Show each step and explain why you chose u and dv.
3 - Cross-reference the method. After getting a solution, check that it matches what your professor taught. Some professors require specific approaches that AI might not default to.
4 - Use it for conceptual explanations. Unstuck AI’s strongest feature is explaining why something works. Ask follow-up questions like “Why does this reaction favor the product? " or “What would happen if the concentration doubled?
For ChatGPT
1 - Be extremely specific with notation. ChatGPT sometimes misinterprets mathematical symbols in plain text. Use clear formatting: “integral from 0 to pi of sin^2(x) dx” rather than “∫sin²x.
- Ask it to verify its own work. After receiving a solution, prompt: “Check this solution for errors by substituting the answer back into the original equation. " ChatGPT will often catch its own mistakes.
3 - Request multiple approaches. For complex problems, ask: “Solve this problem two different ways. " Comparing methods helps you understand the material and increases the chance one solution is correct.
4 - Use it for pure computation. ChatGPT excels at algebraic manipulation and arithmetic. If you’ve set up the problem correctly, it’s reliable for grinding through calculations.
When to Use Which Tool
Choose Unstuck AI when:
- You need help understanding concepts, not just getting answers
- Working on chemistry or biochemistry problems
- You want to upload handwritten problem sets
- You’re stuck on the first step and don’t know where to begin
Choose ChatGPT when:
- You’re dealing with heavy computation (calculus, linear algebra)
- You need to explore multiple solution methods
- Working on statistics or pure math problems
- You want to verify work you’ve already done
The Honest Limitations
Neither tool replaces understanding the material. Both made errors that a student who knows the subject would catch immediately. But a confused student? They’d submit the wrong answer thinking it was right.
Here’s the uncomfortable truth: these tools work best when you already understand the fundamentals. They’re like calculators-incredibly useful for speeding up work you could do yourself, dangerous when you’re blindly trusting them.
Another limitation: neither tool handles multi-step problems well when earlier steps contain errors. One wrong sign propagates through the entire solution. Always check intermediate steps, not just final answers.
Making Your Decision
Unstuck AI earns a slight edge for STEM homework, particularly in sciences requiring conceptual reasoning. Its 72% accuracy beats ChatGPT’s 66%, and its explanations actually teach you something.
But the 6% difference isn’t dramatic. If you already have ChatGPT Plus, it handles math and statistics well enough that Unstuck AI’s subscription might not justify the cost.
My recommendation? Try Unstuck AI’s free tier for your weakest subject. See if the explanations click. For computation-heavy work, ChatGPT remains solid.
And whatever tool you use-verify the answer before submitting. A 72% accuracy rate means you’ll hit wrong answers regularly. The AI should be your starting point, not your final answer.