r/PromptEngineering

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About r/PromptEngineering

Prompt engineering is the application of engineering practices to the development of prompts - i.e., inputs into generative models like GPT or Midjourney.

The community at a glance

r/PromptEngineering is a Subreddit for GPT and Prompt Engineers with roughly 389K members. It uses a forum format for communication. On the Hive Index it ranks #8 in the GPT communities list. It is the 6th largest community in the Prompt Engineering topic page.

Roughly 216K members have joined in the past year. Popular discussion topics include Prompt, Ai, and Engineering. Common discussion themes are Solution Requests and Advice Requests. Product recommendations often mention prompt engineering courses.

On Reddit
389K Members

Community Topics

Community Features

Forum

This community has a forum

Subreddit Analysis

via GummySearch
Yearly: +216K members
Growth: +125.2% / year

Member growth over time

All time (yearly)

  • 2023: 12K members
  • 2024: 41K members
  • 2025: 249K members
  • 2026: 88K members

Past year (monthly)

  • Jul: 15K members
  • Aug: 28K members
  • Sep: 19K members
  • Oct: 20K members
  • Nov: 23K members
  • Dec: 19K members
  • Jan: 15K members
  • Feb: 17K members
  • Mar: 19K members
  • Apr: 16K members
  • May: 13K members
  • Jun: 8K members

Themes

  • Solution Requests
    12 posts in the past month
    1. my friend built GoblinMD : an offline desktop app to pack code & PDFs into prompts for LLMs (open source, built in Python & PyQt5)
    2. I built a free Socratic generator for AI-agent skills — it interrogates you instead of one-shotting a vague SKILL.md
    3. Best AI presentation maker you have used and would or wouldn't recommend?
    #1
    Solution Requests
    my friend built GoblinMD : an offline desktop app to pack code & PDFs into prompts for LLMs (open source, built in Python & PyQt5) · I built a free Socratic generator for AI-agent skills — it interrogates you instead of one-shotting a vague SKILL.md · Best AI presentation maker you have used and would or wouldn't recommend?
    12
  • Advice Requests
    9 posts in the past month
    1. My prompts got 3x better the day I stopped writing more instructions and started writing more examples instead
    2. Do you think prompt engineering will still matter in a few years, or will models just understand us better?
    3. How to make Claude (chat) actually follow the steps in the prompt?
    #2
    Advice Requests
    My prompts got 3x better the day I stopped writing more instructions and started writing more examples instead · Do you think prompt engineering will still matter in a few years, or will models just understand us better? · How to make Claude (chat) actually follow the steps in the prompt?
    9
  • Pain & Anger
    2 posts in the past month
    1. Why most companies are failing at AI adoption (and it's not the reason you'd expect)
    2. Is anyone else canceling their AI subscriptions and just moving to open-source GitHub tools?
    #3
    Pain & Anger
    Why most companies are failing at AI adoption (and it's not the reason you'd expect) · Is anyone else canceling their AI subscriptions and just moving to open-source GitHub tools?
    2
  • Ideas
    1 post in the past month
    1. Built a prompt optimization tool with 2,500+ users, but it still feels like I’m not doing enough
    #4
    Ideas
    Built a prompt optimization tool with 2,500+ users, but it still feels like I’m not doing enough
    1

Topics

  • Prompt
    233 posts in the past month
    1. i found a prompt hack so stupid it should not work. it works every time.
    2. I finally found a prompt that makes ChatGPT write like human
    3. This Claude prompt gave me the most accurate outside-perspective of myself I’ve ever read.
    #1
    Prompt
    i found a prompt hack so stupid it should not work. it works every time. · I finally found a prompt that makes ChatGPT write like human · This Claude prompt gave me the most accurate outside-perspective of myself I’ve ever read.
    233
  • Ai
    198 posts in the past month
    1. Fable 5's guardrails got bypassed in 48 hours. Here's what that actually means for anyone building customer-facing AI.
    2. 150 structured coding prompts grouped by real use cases (debug, refactor, generate, explain)
    3. Do prompts really change how different AI models behave, or is it just hype?
    #2
    Ai
    Fable 5's guardrails got bypassed in 48 hours. Here's what that actually means for anyone building customer-facing AI. · 150 structured coding prompts grouped by real use cases (debug, refactor, generate, explain) · Do prompts really change how different AI models behave, or is it just hype?
    198
  • Engineering
    45 posts in the past month
    1. "Prompt engineering" for agents is the wrong mental model. You're actually writing a distributed systems runbook.
    2. Prompt engineering is overrated for getting real work done
    3. Do you think prompt engineering will still matter in a few years, or will models just understand us better?
    #3
    Engineering
    "Prompt engineering" for agents is the wrong mental model. You're actually writing a distributed systems runbook. · Prompt engineering is overrated for getting real work done · Do you think prompt engineering will still matter in a few years, or will models just understand us better?
    45
  • Tool
    42 posts in the past month
    1. Claude Code Source Deep Dive (Part 5) — Literal Translation & Tool-Call Loop Self-Repair Core Mechanism
    2. Strict mode now guarantees schema-valid tool calls. So I tested whether runtime tool-call validation still matters here's the honest result.
    #4
    Tool
    Claude Code Source Deep Dive (Part 5) — Literal Translation & Tool-Call Loop Self-Repair Core Mechanism · Strict mode now guarantees schema-valid tool calls. So I tested whether runtime tool-call validation still matters here's the honest result.
    42
  • System
    33 posts in the past month
    1. How do you prompt an AI agent that has write access to real world systems
    2. “Prompt engineering” turned out to be the easiest part of production AI systems
    3. LLMs are notoriously overconfident, so I updated my system prompt to force a statistical "Confidence Metric" (SutniPrompt v0.6.0-beta)
    #5
    System
    How do you prompt an AI agent that has write access to real world systems · “Prompt engineering” turned out to be the easiest part of production AI systems · LLMs are notoriously overconfident, so I updated my system prompt to force a statistical "Confidence Metric" (SutniPrompt v0.6.0-beta)
    33

Flair

  • General Discussion
    68 posts in the past month
    1. I AM CANCELLING MY CLAUDE PRO SUBSCRIPTION (and here's my honest take)
    2. I spent a full day watching every major AI agent tutorial in 2026 - here's what actually matters
    3. Hidden prompt injection in a PDF almost got my org
    #1
    General Discussion
    I AM CANCELLING MY CLAUDE PRO SUBSCRIPTION (and here's my honest take) · I spent a full day watching every major AI agent tutorial in 2026 - here's what actually matters · Hidden prompt injection in a PDF almost got my org
    68
  • Prompt Text / Showcase
    35 posts in the past month
    1. I paste a rough idea into Claude and make it interview me before it writes anything. The questions it asks are better than the draft most prompts produce.
    2. I set Claude up as an agent that spies on my competitors every Monday morning. It even reads their job listings to work out what they're about to do.
    3. Anthropic released a data pack that writes and runs database queries from plain English. You don't need to know SQL. Most people have no idea it exists.
    #2
    Prompt Text / Showcase
    I paste a rough idea into Claude and make it interview me before it writes anything. The questions it asks are better than the draft most prompts produce. · I set Claude up as an agent that spies on my competitors every Monday morning. It even reads their job listings to work out what they're about to do. · Anthropic released a data pack that writes and runs database queries from plain English. You don't need to know SQL. Most people have no idea it exists.
    35
  • Quick Question
    18 posts in the past month
    1. Do prompts really change how different AI models behave, or is it just hype?
    2. Best AI presentation maker you have used and would or wouldn't recommend?
    3. Anyone come across a prompt that analyzes an investment portfolio exclusively and makes recommendations on buy /sell etc?
    #3
    Quick Question
    Do prompts really change how different AI models behave, or is it just hype? · Best AI presentation maker you have used and would or wouldn't recommend? · Anyone come across a prompt that analyzes an investment portfolio exclusively and makes recommendations on buy /sell etc?
    18
  • Tools and Projects
    17 posts in the past month
    1. I built a local PDF-to-Markdown converter so you don't have to burn LLM tokens.
    2. my friend built GoblinMD : an offline desktop app to pack code & PDFs into prompts for LLMs (open source, built in Python & PyQt5)
    3. Quick warning for anyone running an LLM feature in production
    #4
    Tools and Projects
    I built a local PDF-to-Markdown converter so you don't have to burn LLM tokens. · my friend built GoblinMD : an offline desktop app to pack code & PDFs into prompts for LLMs (open source, built in Python & PyQt5) · Quick warning for anyone running an LLM feature in production
    17
  • Tips and Tricks
    14 posts in the past month
    1. An elegant prompting technique from Anthropic's Amanda Askell that changes how you learn complex concepts
    2. i found a prompt hack so stupid it should not work. it works every time.
    3. Fable 5's guardrails got bypassed in 48 hours. Here's what that actually means for anyone building customer-facing AI.
    #5
    Tips and Tricks
    An elegant prompting technique from Anthropic's Amanda Askell that changes how you learn complex concepts · i found a prompt hack so stupid it should not work. it works every time. · Fable 5's guardrails got bypassed in 48 hours. Here's what that actually means for anyone building customer-facing AI.
    14

Product recommendations

  • prompt engineering courses
    2 posts in the past month
    1. Recommend best prompt engineering courses
    2. Recommend best prompt engineering courses
    #1
    prompt engineering courses
    Recommend best prompt engineering courses · Recommend best prompt engineering courses
    2
View full analysis on GummySearchSynced 6/21/2026

Frequently asked questions

Who is r/PromptEngineering for?
Best for GPT and Prompt Engineers enthusiasts looking for a Reddit-based community with forum discussion.
Is r/PromptEngineering free to join?
This listing is not marked as paid-only. Access rules and any fees are decided by the community.
How many members does r/PromptEngineering have?
Roughly 389K members, based on figures reported by the community or its host. Member counts are approximate and change over time.
What platform is r/PromptEngineering on?
r/PromptEngineering runs on Reddit. Reddit communities (or "subreddits") are forum-based groups on the popular social news aggregation, web content rating, and discussion website Reddit. Reddit is commonly known as "the front page of the internet". Users submit content to the site such as links, text posts, and images, which are then voted up or down and discussed by other members. From investing Reddit communities, to professional ones, to ones just for laughs, you're likely to find a community for you on Reddit.
What topics does r/PromptEngineering cover?
On the Hive Index, r/PromptEngineering is organized under GPT, Prompt Engineers.
How do I join r/PromptEngineering?
You can join r/PromptEngineering by clicking this link, or pressing the "Go to community" button above.
What are the GPT communities like?
Communities centered on using and understanding GPT and other large language models. Reddit and Discord both have active spaces for prompt design, model comparisons, and discussions on where LLM capabilities are heading, serving everyone from developers to curious non-technical users.
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Added 5/25/2023

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