These are 18 fill-in-the-blank templates for DeepSeek, the free, open-source (MIT) assistant at chat.deepseek.com. Each one is a reusable skeleton: replace the parts in [BRACKETS] with your own details and paste the whole thing in. They target DeepSeek-V3.2 and its 128K context, and they are grouped by job — reasoning, coding, writing, research, business, and study.
Every template is built on the same shape: Role + Task + Context + Constraints + Output format. Two small habits make them land harder. Turn on DeepThink for the reasoning, math, and coding templates so you can watch the chain-of-thought and catch a wrong turn; turn on Search for the research ones and demand citations. New here? The best DeepSeek prompts roundup is the full set, and the DeepSeek prompt cheat sheet is a one-page reference.
Reasoning & problem-solving
Turn on DeepThink for everything in this section. DeepSeek's golden rule is to hand it a hard problem with rich context, ask it to think step by step, and make it verify against the constraints at the end.
1. Step-by-step problem solver
Turn on DeepThink. Solve this problem: [DESCRIBE THE PROBLEM IN FULL].
Context you need: [BACKGROUND, NUMBERS, RULES].
Think step by step and show your reasoning. State any assumptions you make. Then give the final answer clearly, and as a last step verify it against every constraint above and flag anything that doesn't hold.Best for: Any multi-step problem where you want to see the working, not just a confident answer.
2. Decision under constraints
Turn on DeepThink. Help me decide between these options: [OPTION A], [OPTION B], [OPTION C].
My situation: [CONTEXT]. What matters most to me, in order: [PRIORITY 1], [PRIORITY 2], [PRIORITY 3]. Hard constraints I can't break: [CONSTRAINTS].
Reason through each option step by step against my priorities, build a comparison table, then recommend one and explain the trade-off I'm accepting. Verify the pick doesn't violate any hard constraint.Best for: Choosing between real options when several factors pull in different directions.
3. Word problem to math
Turn on DeepThink. Solve this: [PASTE THE WORD PROBLEM].
First restate what's being asked in your own words and list the known values. Set up the equations, solve step by step, and show each line. Give the final answer with units. Then verify by plugging the answer back into the original numbers and confirm it checks out.Best for: Math and quantitative problems where a plug-back check catches silent errors.
Coding
Turn on DeepThink for hard bugs and design work. Always paste the real code, name your language and versions, and give the exact error. For a deeper set, see the DeepSeek coding prompts.
4. Debug with a root-cause trace
Turn on DeepThink. I'm getting this error in [LANGUAGE / FRAMEWORK + version]: [PASTE ERROR].
Here's the relevant code: [PASTE CODE].
What I expected: [EXPECTED]. What happens instead: [ACTUAL].
Trace the root cause step by step. If more than one cause is possible, rank them by likelihood. Give me the corrected code and explain the fix in two sentences. Then verify your fix actually addresses the error above and note any edge case it might miss.Best for: Subtle bugs where you want the reasoning trace, not just a patched line.
5. Build a function from a spec
Turn on DeepThink. Write a [LANGUAGE] function that does this: [DESCRIBE BEHAVIOR].
Inputs: [INPUTS AND TYPES]. Outputs: [OUTPUT]. Edge cases to handle: [EDGE CASES]. Constraints: [PERFORMANCE / DEPENDENCIES / STYLE].
Write clean, idiomatic code with brief comments on the tricky parts. Then verify it against each edge case above by walking through what happens, and list any input you're unsure about.Best for: Getting a function that actually handles the edge cases you name up front.
6. Refactor without changing behavior
Refactor this code for readability and maintainability without changing behavior: [PASTE CODE].
Improve naming, reduce nesting, and extract logic where it helps. Keep it idiomatic for [LANGUAGE] and don't add dependencies.
Return the refactored version, then a short bullet list of what you changed and why. As a final check, confirm the inputs and outputs still match the original for the same cases.Best for: Cleaning up working code safely, with a change list you can review before merging.
Writing
DeepSeek matches your voice well when you give it a Role, real Context, and an exact Output format. Paste your actual notes so the facts stay yours and it only handles structure and polish.
7. Draft from an outline
You are a writer for [AUDIENCE]. Write a [LENGTH]-word [PIECE TYPE] titled "[TITLE]" from this outline: [PASTE OUTLINE].
Tone: [TONE]. Lead each section with the takeaway, use short paragraphs and concrete examples, and cut clichés and filler. Output in clean Markdown with H2 sections and a two-line intro.Best for: Turning a rough outline into a publishable first draft.
8. Rewrite for clarity and tone
Rewrite the text below to be clearer and more direct without losing meaning. Cut filler, fix weak verbs, and keep my key terms.
Target tone: [TONE]. Reading level: [LEVEL].
Return the rewrite first, then a short bullet list of the main changes you made.
Text: [PASTE TEXT]Best for: Tightening anything you've drafted, with the edit list attached so you stay in control.
9. Repurpose one piece into many
Repurpose this piece into content for other channels: [PASTE ARTICLE / TRANSCRIPT].
I want: [NUMBER] short social posts, a [LENGTH]-word newsletter blurb, and [NUMBER] headline options.
Keep my voice [TONE], stay faithful to the original points, and don't invent facts that aren't in the source. Label each output clearly.Best for: Stretching one solid piece across a week of channels without rewriting from scratch.
Research & analysis
Turn on Search for this section so DeepSeek pulls live pages instead of answering from its training cutoff. Always ask it to cite every source with a link so you can verify each claim.
10. Cited research brief
Turn on Search. Research this question and brief me: [RESEARCH QUESTION].
Cover: the current state, the main viewpoints, and where the evidence points. Prefer primary and recent sources.
Cite every source with a link, note the publication date next to each key fact, and end with a short synthesis of where sources agree and where they conflict.Best for: A checkable overview of a topic instead of a confident guess from memory.
11. Compare options with sources
Turn on Search. Compare [OPTION A] and [OPTION B] for a [USE CASE] buyer.
Build a table: price, key features, real user complaints, and best-fit user. Pull from current reviews and forums, and cite every source with a link.
End with a clear recommendation for someone who cares most about [PRIORITY], and flag anything the sources disagreed on.Best for: A buying or tooling decision grounded in current reviews, not old marketing copy.
12. Summarize a long document
Summarize this document for a [WHO / ROLE] reader who has [HOW MUCH TIME]: [PASTE OR UPLOAD DOCUMENT].
Give me: a three-line executive summary, the 5-7 key points as bullets, any numbers or decisions that matter, and open questions the document leaves unanswered. Don't add anything that isn't in the source, and quote the exact line for any claim I might push back on.Best for: Reports, contracts, and papers — upload the file and let the 128K context hold the whole thing.
Business & work
Give DeepSeek your real context and it handles the structure. Add DeepThink when the task needs judgment, like pressure-testing a plan or triaging priorities.
13. One-page plan for an idea
You are a pragmatic 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 with no filler.Best for: Pressure-testing an idea before you sink time into it. The "be blunt" line earns its place.
14. Meeting notes to action items
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 left unresolved.Best for: Turning a wall of notes into something the team can actually track.
15. Professional email drafter
Write an email from me ([MY ROLE]) to [RECIPIENT] about [TOPIC].
Goal: [WHAT I WANT TO HAPPEN]. Tone: [TONE]. Keep it under [WORD COUNT] words.
Open with the reason I'm writing, state the ask clearly, and end with a specific next step. Give me two subject-line options.Best for: The email you keep putting off — a clean draft with subject lines to pick from.
Study & learning
DeepSeek is a strong tutor when you tell it your level and what to do with a wrong answer. Turn on DeepThink for step-by-step explanations of hard concepts.
16. Explain a hard concept
Explain [CONCEPT] to me. I currently know [YOUR LEVEL / WHAT YOU ALREADY UNDERSTAND].
Start with a plain-language explanation, then one concrete everyday analogy, then a worked example step by step. Finish with the single most common misconception about it and why it's wrong. Keep it concise and don't assume knowledge I didn't mention.Best for: Getting a genuinely clear explanation pitched at exactly where you are.
17. Study guide and quiz maker
Make a study guide for [TOPIC / EXAM] at a [LEVEL] level from this material: [PASTE OR UPLOAD NOTES].
Give me: the key concepts as a bulleted outline, 8 flashcard-style Q&A pairs, and a 6-question quiz (mixed difficulty) with an answer key at the bottom. Base everything on the material provided, and mark anything you added from general knowledge.Best for: Turning class notes into active-recall practice you can drill.
18. Socratic tutor
Be my Socratic tutor for [SUBJECT / SKILL]. My level: [LEVEL]. My goal: [GOAL].
Don't just give answers — ask me one guiding question at a time, wait for my reply, and adjust based on what I get right or wrong. When I'm stuck, give a hint before the answer. Keep each turn short and end each one with the next question.Best for: Actually learning a topic instead of copying an answer you'll forget.
Want the shortest reference for all of this? The DeepSeek prompt cheat sheet lists every toggle and modifier on one page, and the best DeepSeek prompts roundup has the full set worth saving.
Frequently Asked Questions
How do the fill-in-the-blank templates and brackets work?
Each template is a skeleton built on Role + Task + Context + Constraints + Output format. Anything in square [BRACKETS] is a swap-in: replace [TOPIC], [PASTE CODE], or [AUDIENCE] with your own details, then paste the whole thing into DeepSeek. The wording around the brackets is written to stay copy-paste ready.
Which DeepSeek model do these work with?
They target DeepSeek-V3.2, the free flagship at chat.deepseek.com as of December 2025, with a 128K-token context window. Nothing is version-specific, so they also work on earlier V3 releases and in the API.
When should I turn on DeepThink?
Turn on DeepThink for the reasoning, math, and coding templates, and any time the problem has multiple constraints or steps. It shows the chain-of-thought so you can see how DeepSeek got there and catch a wrong turn. For quick rewrites or simple lookups, leave it off.
When should I turn on Search?
Turn on Search for the research and analysis templates, or anytime you need current facts DeepSeek's training data won't have. Search pulls live pages; add "cite every source with a link" so the output is auditable.
Can I combine templates?
Yes. Stack a research template to gather cited facts, then feed the result into a writing template to draft the piece. DeepSeek's 128K context holds plenty, so you can paste long inputs and chain steps in one chat.
Are these templates free to use?
Yes. DeepSeek is a free, open-source (MIT) assistant, and these templates are free to copy, edit, and reuse. No account tier is required for any of them.
Do they work in Instant vs Expert mode?
All templates work with the toggles off (the fast, default response). The reasoning and coding ones are stronger with DeepThink on, since the extra reasoning is where the model earns its keep. Research ones want Search on. The templates themselves are mode-agnostic.