40 Best DeepSeek Prompts (2026)

Turn on DeepThink. I need to decide between [OPTION A] and [OPTION B]. Context: [YOUR SITUATION, CONSTRAINTS, WHAT MATTERS MOST]. Think step by step: lay out the real trade-offs, the second-order consequences of each, and the assumptions I might be wrong about. Then give a recommendation with your confidence level, and state what new information would change your answer.

Turn on DeepThink. Solve this logic problem and show every step of your reasoning: [PASTE PUZZLE]. Track the constraints as you go, note each deduction and why it follows, and eliminate options explicitly. Before giving the final answer, verify it satisfies every constraint in the problem. If more than one solution fits, say so.

Turn on DeepThink. Here is a problem I can't pin down: [DESCRIBE SYMPTOMS, WHAT YOU'VE TRIED, RELEVANT DATA OR LOGS]. Reason step by step from symptoms to likely root causes. Rank the causes by probability, explain the evidence for each, and give me the single cheapest test to confirm or rule out the top one. Separate what you know from what you're inferring.

Turn on DeepThink. Here is my plan: [PASTE PLAN]. Act as a sharp skeptic. Think step by step and find the ways this fails: hidden assumptions, weak links, single points of failure, and second-order effects I haven't considered. For each risk, rate its likelihood and impact, and suggest a concrete mitigation. Be blunt; I'd rather hear it now.

I'm choosing between these options: [LIST OPTIONS]. My criteria, most important first: [LIST CRITERIA]. Build a weighted decision matrix: score each option 1-5 on each criterion, apply the weights, and total them. Show the table, explain any score that isn't obvious, and give the winner. Then tell me which single criterion, if I'm wrong about its weight, would flip the result.

Turn on DeepThink. I'm getting this error in [LANGUAGE / FRAMEWORK version]: [PASTE ERROR]. Here's the relevant code: [PASTE CODE]. Reason step by step through the likely root cause, give me the corrected code, and explain what was wrong in two sentences. If more than one cause is possible, rank them by likelihood. Verify your fix against the error before giving the final answer.

Explain what this code does to a developer new to [LANGUAGE / LIBRARY]: [PASTE CODE]. Give a one-paragraph overview, then a block-by-block walkthrough of the tricky parts, and call out any bugs, edge cases, or performance concerns you notice. Keep it concrete and skip the obvious lines.

Write thorough unit tests for this function using [TEST FRAMEWORK]: [PASTE FUNCTION]. Cover the happy path, edge cases, invalid inputs, and boundary conditions. Explain in one line what each test verifies, and flag any behavior in the function that looks like a bug or is ambiguous enough to need a spec decision.

Refactor this code for readability and maintainability without changing behavior: [PASTE CODE]. Improve naming, reduce nesting, and extract logic where it helps. Return the refactored version, then a short bullet list of what you changed and why. Keep it idiomatic for [LANGUAGE] and don't add dependencies.

Turn on DeepThink. Build [FEATURE] in [LANGUAGE / STACK]. Requirements: [LIST REQUIREMENTS]. Constraints: [PERFORMANCE, DEPENDENCIES, STYLE]. First outline your approach and the key decisions, then write the full, runnable code with comments on the non-obvious parts. List any assumptions you made and how I'd test it. Verify the code meets each requirement before finishing.

Turn on DeepThink. Solve this problem and show all working: [PASTE PROBLEM]. State any formulas or theorems you use and why they apply. After reaching an answer, verify it by a different method or by substituting back into the original problem. If the check fails, find the error and redo it. Give the final answer clearly at the end.

Turn on DeepThink. Prove or disprove: [STATEMENT]. Reason step by step. State your assumptions and definitions first, then build the argument rigorously. If it's false, give a clear counterexample and explain why it breaks the claim. Flag any step where the logic is only plausible rather than certain.

Turn on DeepThink. Translate this word problem into equations, then solve: [PASTE PROBLEM]. Define each variable in plain words, write the equations, and solve step by step. Sanity-check the answer against the real-world meaning of the problem (units, sign, plausible range) before giving the final result.

Turn on DeepThink. Check this work for errors: [PASTE PROOF OR CALCULATION]. Go line by line. For each step, say whether it's correct and why. If you find a mistake, point to the exact line, explain the error, and show the corrected version. If it's fully correct, say so and note the key step everything hinges on.

Turn on DeepThink. Help me with this probability/statistics question: [PASTE QUESTION]. State which distribution or method applies and why, show the setup and the computation step by step, and give the numeric answer with units. Then explain the result in one plain-English sentence and name one common way people get this type of problem wrong.

You are a writer for [AUDIENCE]. Write a [1,200]-word blog post titled "[TITLE]" from this outline: [PASTE OUTLINE]. Keep the tone practical and direct, lead each section with the takeaway, use short paragraphs and concrete examples, and avoid clichés and filler. Output in clean Markdown with H2 sections and a two-line intro.

Rewrite the text below to be clearer and more direct without losing meaning. Cut filler, fix weak verbs, and keep my key terms. Target a [confident but plain] tone at a [general professional] reading level. Return the rewrite first, then a short bullet list of the main changes you made. Text: [PASTE TEXT]

You are writing a cold outreach email from me ([MY ROLE] at [MY COMPANY]) to [PROSPECT ROLE] at [PROSPECT COMPANY]. Goal: [GOAL]. Keep it under 90 words, open with a specific reason I'm reaching out to them (not a template), state one clear value point, and end with a low-friction ask. Give me three subject-line options.

Generate 12 headline options for [PIECE / PRODUCT] aimed at [AUDIENCE]. Mix angles: benefit-led, curiosity, contrarian, number-led, and how-to. Keep each under 65 characters, avoid hype words, and label the angle of each. Then pick your top three and say why they'd perform best.

Write a [500]-word [genre] scene. Setup: [WHO, WHERE, WHAT'S AT STAKE]. Point of view: [FIRST / THIRD], tense: [PAST / PRESENT]. Show, don't tell; let the tension build through action and dialogue rather than narration; end on a beat that pulls the reader forward. Match this voice: [DESCRIBE OR PASTE A SAMPLE]. Avoid clichés and purple prose.

I've attached a document. Read it in full, then give me: a 3-sentence summary, the 5 most important points as bullets, any conclusions or recommendations it makes, and anything it leaves unanswered or assumes without evidence. Ground every point in the document only; if something isn't in it, say so rather than filling the gap.

Turn on Search. Research [TOPIC / QUESTION] and write me a brief as of this month. Cover the current state, the main viewpoints, and where things are heading. Cite every source with a link, prefer primary and recent sources, and note the publication date next to each fact. End with what's still uncertain or contested.

Turn on Search. Find the main sources on [QUESTION] and compare what they say. Build a table: Source | Key claim | Evidence given | Date | Link. Then tell me where the sources agree, where they conflict, and which claim is best supported. Flag any source that looks weak or out of date. Cite every source with a link.

I've attached a file. Extract [WHAT YOU NEED — e.g. every date, name, and amount] and return it as a clean table with columns [COLUMN 1, COLUMN 2, ...]. Read the whole document, don't skip sections, and leave a cell blank rather than guessing if the value isn't stated. After the table, list anything ambiguous that you had to interpret.

Turn on Search. Fact-check this claim: "[CLAIM]". Find the original source, what the primary evidence actually says, and how credible outlets have covered it. Rate it True / Misleading / False / Unproven with a short reason. Cite every source with a link, and separate what's confirmed from what's still uncertain.

Turn these meeting notes into a clean summary: [PASTE NOTES]. Output three sections: Decisions made, Action items (as a table with Owner, Task, Due date), and Open questions. Keep it tight, don't invent details that aren't in the notes, and flag anything that was left unresolved.

You are a pragmatic startup advisor. Draft a one-page plan for this idea: [DESCRIBE IDEA]. Cover: the problem, the target customer, the offer, how it makes money, the first three steps to validate it cheaply, and the biggest risk. Be blunt about weaknesses. Output as clear sections, no filler.

I need a [Google Sheets] formula/model to [GOAL]. My data is laid out like this: [DESCRIBE COLUMNS]. Give me the formula, explain what each part does, and note common ways it could break (blank cells, text vs numbers). If a small helper column would make it cleaner, suggest it.

Turn on DeepThink. Write a one-page strategy memo on [DECISION / QUESTION]. Context: [BACKGROUND, GOALS, CONSTRAINTS, DATA]. Lay out 2-3 real options, the trade-offs of each, and a clear recommendation with the reasoning. Name the key assumption the recommendation rests on and what would have to be true for it to hold. Keep it tight and executive-ready.

Here's everything on my plate this week: [PASTE LIST]. Act as a sharp chief of staff. Sort it by impact and urgency, tell me the three things that actually move the needle, what to delegate or drop, and lay it out as a simple day-by-day plan. Call out anything that looks like busywork.

Explain [CONCEPT] to me. First give the one-sentence core idea, then build it up with a concrete everyday analogy, then a worked example, then the common misconception people have. Assume I know [YOUR CURRENT LEVEL]. End with two questions I could answer to check I actually understood it.

I need to learn [SUBJECT / EXAM] by [DATE]. I can study [HOURS] per week and my current level is [LEVEL]. Build a week-by-week plan: what to cover each week, in what order, and which topics need the most time based on how hard or foundational they are. Include checkpoints to test myself and a lighter final week for review.

Quiz me on [TOPIC] at [LEVEL]. Ask one question at a time and wait for my answer before the next. After each answer, tell me if I'm right, correct any mistake with a short explanation, and adjust the difficulty based on how I'm doing. Keep going for [10] questions, then give me a summary of what I've got down and what to review.

Turn these notes into spaced-repetition flashcards: [PASTE NOTES OR ATTACH FILE]. Make each card one clear question and one concise answer, testing a single fact or idea. Avoid cards that are too easy or that bundle several facts. Output as a two-column table (Front | Back) so I can import them, and group by subtopic.

Turn on DeepThink. Be a Socratic tutor for [TOPIC / PROBLEM]. Don't give me the answer. Ask me guiding questions one at a time that lead me to work it out myself, and when I'm stuck, give the smallest hint that unblocks me rather than the solution. If I go wrong, ask a question that helps me see the mistake. Start now.

Turn on Search. Plan a [NUMBER]-day trip to [DESTINATION] for [WHO] with a budget of [BUDGET]. We like [INTERESTS] and want to avoid [DISLIKES]. Give a day-by-day itinerary with realistic timing, group nearby stops to cut travel, and note current prices and opening hours where you can with links. Add one rainy-day backup and one splurge option.

I have these ingredients: [LIST]. Plan [NUMBER] meals for [PEOPLE] using mostly what I have, adding as few new items as possible. For each meal give a short ingredient list, quick steps, and rough time. Respect these needs: [DIET / ALLERGIES / DISLIKES]. At the end, give me a short shopping list of only the extras I'd need.

Help me write a message to [WHO] about [SITUATION]. My goal is [GOAL] and I want to sound [TONE — e.g. firm but kind]. Keep it honest and clear, don't over-apologize or ramble, and leave the door open for a good response. Give me two versions: a shorter and a slightly warmer one. Context they'll need: [BACKGROUND].

Turn on DeepThink. Here's my monthly income and spending: [PASTE NUMBERS OR CATEGORIES]. My goal is [GOAL — e.g. save X, pay down debt]. Analyze where the money goes, flag the categories that look high for my goal, and suggest a realistic adjusted budget with specific numbers. Show your reasoning and don't recommend cuts that would be too painful to stick to. This is general guidance, not financial advice.

I'm about to decide [DECISION]. Interview me to build a decision journal entry: ask me what I'm choosing, what I expect to happen, my confidence, and how I'll know later if it was right. Ask one question at a time. At the end, summarize my reasoning and expected outcome in a short entry I can revisit in [TIMEFRAME] to check how I actually did.