GUIDE

ChatGPT Tips Every Developer Should Know

A field guide of ChatGPT tips for developers, from prompting and context to custom instructions and knowing when the API or Codex is the better tool for the job.

By Ian MacCallum··8 min read

Most developers already use ChatGPT, but a lot of them use it like a search box: paste a question, copy an answer, move on. These chatgpt tips for developers are about getting more out of the same tool by being deliberate with prompting, context, and configuration, and by knowing when a chat window is the wrong surface entirely. None of these tricks depend on a specific model version, so they should keep working as the lineup shifts. (For the record, Open Drops is an independent project and is not affiliated with OpenAI. We just track and summarize OpenAI's developer-facing releases.)

Why good prompting matters more than the model

The single biggest lever on output quality is not which model you pick, it is how clearly you describe the task. A vague prompt produces a generic answer, and generic answers cost you time in review and rework. The strongest chatgpt tips for developers all come back to the same idea: give the model the same context you would give a competent teammate who just joined the project. State the goal, the constraints, the runtime, the versions, and what a good answer looks like. The model cannot see your repo, your error logs, or your house style unless you put them in the prompt.

Treat the first answer as a draft, not a verdict. Ask the model to critique its own output, list edge cases it ignored, or rewrite it under a tighter constraint. The second pass is usually where the quality shows up.

Ten practical tips for coding with ChatGPT

Here is the working list. Each one is small on its own, but together they change how reliable the tool feels day to day.

  1. Lead with the goal and the constraints. Say what you are building, the language and version, the framework, and any rules the code must follow before you ask for anything.
  2. Paste the real error, not a paraphrase. Include the full stack trace, the failing input, and the relevant code. A summarized error usually gets a summarized guess.
  3. Ask for a plan before code on anything non-trivial. Have the model outline its approach first, correct the plan, then ask it to implement. This catches wrong assumptions cheaply.
  4. Request the why, not just the what. Ask it to explain trade-offs and call out assumptions, so you can judge the answer instead of trusting it.
  5. Constrain the format. Ask for a single function, a diff, a typed signature, or a step list. Unbounded requests produce unbounded, hard-to-use answers.
  6. Give it a role and a standard. Tell it to write idiomatic, production-grade code for your stack and to prefer the standard library over new dependencies unless asked.
  7. Iterate in the same thread. Keep refactors in one conversation so the model retains context, rather than re-explaining the problem in a fresh chat each time.
  8. Ask for tests alongside the code. Tests force the model to make behavior explicit, and they give you a fast way to verify what it produced.
  9. Have it review your code, not just write it. Paste a function and ask for bugs, security issues, and edge cases. Review is often where it is most useful.
  10. Always verify before you ship. Run the code, read it, and check anything that touches security, money, or data. The model can be confidently wrong.
ChatGPT can produce plausible code that references APIs, flags, or packages that do not exist. Never paste generated commands or code into production without running and reading them first, especially anything that deletes data or changes infrastructure.

Use custom instructions and memory to stop repeating yourself

If you find yourself typing the same preamble every session ("use TypeScript, prefer functional style, no extra dependencies"), move it into custom instructions. Custom instructions let you set durable preferences that apply to every new chat, so you describe your stack and standards once instead of on every prompt. Memory features can carry context across conversations as well. The exact controls and their names change over time, so open your settings and check what your plan currently exposes rather than assuming a specific layout. Used well, this is one of the highest-leverage tips here: it raises the floor on every answer with zero per-prompt effort.

  • Record your primary languages, frameworks, and versions so answers target your stack by default.
  • State house style: naming, error handling, comments, and whether to add dependencies.
  • Say how you want answers shaped, for example "show a diff" or "keep explanations short."
  • Review and prune these periodically, because stale instructions quietly degrade output.

Know when ChatGPT is the wrong tool

The chat app is excellent for thinking, exploring, and one-off help, but it is not always the right surface. When you need a capability inside your own software, reach for the OpenAI API instead, where you get structured outputs, tool calling, and streaming you can build on. When the job is an autonomous, multi-file engineering task rather than a single answer, Codex is the better fit. If you are new to that distinction, our guide on what ChatGPT offers developers breaks down the three surfaces and where each one fits.

Your situationReach forWhy
One-off question, debugging, or learningChatGPT appFast, interactive, no setup required
A capability inside your own productOpenAI APIProgrammatic, structured outputs and tool calling
Multi-step engineering across filesCodexAgentic: plans, edits, and runs steps
High-volume or latency-sensitive pathsAPI with a smaller modelLower cost and faster responses at scale
Repeated preamble every sessionCustom instructionsSet preferences once, apply everywhere
A common workflow: explore and prototype a prompt in the app, then port the stable version to the API once you know it works. Re-test after the move, because behavior can differ between the app and the API.

Habits that keep your output trustworthy

Speed only helps if you can trust what comes back. A few habits keep the tool honest. Scope each conversation to one problem so context stays clean. Ask for sources or reasoning on factual claims so you can check them. Keep anything sensitive (secrets, customer data, proprietary code) out of prompts unless your plan and policies clearly allow it. And treat volatile facts, like pricing, rate limits, or which model is current, as things to confirm in the docs rather than trust from a chat answer, since those move faster than any model's training data.

  • One problem per thread keeps context relevant and answers sharper.
  • Ask "what could be wrong with this?" before you trust generated code.
  • Keep secrets and sensitive data out of prompts unless explicitly permitted.
  • Confirm pricing, limits, and model names in official docs, not in chat.

Stay current

ChatGPT changes fast: models, features, and limits all shift, and a tip that depends on a specific button or model name can go stale quickly. The durable skills here (clear prompting, good context, custom instructions, and picking the right surface) outlast any single release. To follow what actually changes without reading every announcement, the Open Drops app detail page and the OpenAI changelog summarize OpenAI's developer-facing updates, and you can get the iOS app on the App Store. For the source of truth on capabilities and pricing, keep the official OpenAI docs handy.

Sources

  1. OpenAI Platform documentation
  2. OpenAI prompt engineering guide
  3. OpenAI API reference
  4. OpenAI changelog
IM

Ian MacCallum

Maintainer, Claude Drops

Ian builds Claude Drops and reads every Claude Code release so you don't have to. He writes plain-English guides to Claude Code's features, drawing directly from the official changelog and documentation.

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FAQ

Frequently asked questions

What is the most important ChatGPT tip for developers?+
Give context. The biggest quality gains come from describing the task as clearly as you would for a new teammate: the goal, the language and version, the constraints, and what a good answer looks like. The model cannot see your repo or environment, so anything it needs has to be in the prompt.
How do I get ChatGPT to write better code?+
Ask for a plan before the implementation, constrain the output format (a single function, a diff, a typed signature), request tests alongside the code, and have it explain trade-offs so you can judge the result. Then run and read the code before using it, since the model can be confidently wrong.
What are custom instructions and should I use them?+
Custom instructions are durable preferences that apply to every new chat, so you can record your stack, house style, and preferred answer format once instead of repeating them each session. They are one of the highest-leverage settings for developers. The exact controls change over time, so check what your plan currently exposes.
When should I use the API or Codex instead of the ChatGPT app?+
Use the app for interactive, one-off help. Use the OpenAI API when you need a capability inside your own software, with structured outputs and tool calling. Use Codex for autonomous, multi-step engineering tasks that span multiple files rather than a single answer.
How do I keep up with ChatGPT changes as a developer?+
Treat the official OpenAI docs and changelog as the source of truth for models, pricing, and limits, since those move quickly. Open Drops also summarizes OpenAI's developer-facing releases so you can follow what changed without reading every post.