ChatGPT, Codex & the API, for GTM & marketing teams
Practical guides to ChatGPT, Codex, the API, research, and automation for GTM teams. Choose a workflow, understand the tools, and check the result.
Two ways in
Find workflows from across the site by the role you sit in or the funnel stage you need to move.
Start with your seat
Playbooks, skills, prompts, and guides for the work your role needs to get done.
Follow the funnel
Research, outreach, sales, and recurring operations, with the tools for each workflow clearly named.
Prefer a guided route?
Curated, in-order tracks through the library. Follow one start-to-finish, or jump straight to any guide below.
Get useful work out of ChatGPT
Start with one checked result, then learn how to reuse context and work with sources.
- What is ChatGPT? Chat, Work, Codex and the API explained
- Getting started with ChatGPT: your first useful workflow
- ChatGPT custom instructions and prompting: brief the work clearly
- ChatGPT Projects: keep the right context around the work
- ChatGPT file uploads and data analysis: check the spreadsheet
- ChatGPT search and deep research: from sources to a decision
Make your first Codex change
Learn the work loop, run a known-answer exercise and review the change before it ships.
- What is Codex? A practical guide for GTM operators
- Getting started with Codex: your first checked project change
- Codex AGENTS.md: give your repository a working brief
- Codex permissions: files, network access and approvals
- Codex code review and Git: inspect the change before it ships
- Codex skills, MCP and plugins: what each one does
Build a small API workflow
Understand access and model choice, make one request, then add structure and tools when needed.
Browse every guide
Start here
4 guidesWhat is ChatGPT? Chat, Work, Codex and the API explained
ChatGPT is OpenAI's product for working with AI through conversation. Chat supports questions and back-and-forth; Work carries...
Getting started with ChatGPT: your first useful workflow
Start with one small task, supply the relevant sources, specify the output and review the result. Use Chat for a conversation...
ChatGPT and Codex models: choosing capability and reasoning
Choose a model for the task and the product surface where you are working. Current official Work and Codex guidance...
ChatGPT and Codex plans, pricing and usage limits
Choose a plan by the work, required controls and actual usage. Official documentation currently lists Plus at $20 monthly, Pro...
ChatGPT basics
9 guidesChatGPT Projects: keep the right context around the work
A ChatGPT Project keeps related chats, files, instructions and sources together. Use it when several tasks share durable...
ChatGPT memory and context: what carries into the next task
Context is the information available for the current task. Memory can carry useful information between tasks, while Projects...
ChatGPT custom instructions and prompting: brief the work clearly
Use custom instructions for stable preferences and task prompts for the specific outcome, sources and checks. Project...
ChatGPT file uploads and data analysis: check the spreadsheet
Give ChatGPT the source file, metric definitions, desired output and validation checks. Use Work for a finished analysis or...
Writing with ChatGPT: drafts, documents and focused revisions
Use Chat for a short drafting conversation and Work when you need a finished document, presentation or PDF. Supply the...
ChatGPT search and deep research: from sources to a decision
Use search for focused current questions and deep research for an investigation across sources. In current Work documentation,...
ChatGPT apps and plugins: connect the right tools
Apps and plugins let ChatGPT work with connected services and reusable capabilities. A plugin can bundle skills, tool...
ChatGPT scheduled tasks: build a useful recurring brief
ChatGPT scheduled tasks run recurring work in supported environments. Cloud tasks use cloud-accessible sources; local desktop...
Custom GPTs: package a focused assistant for your team
A custom GPT packages a focused assistant with instructions and configured capabilities. Use one when people need a repeatable...
Codex
8 guidesWhat is Codex? A practical guide for GTM operators
Codex is OpenAI’s developer-facing agent experience for working with code, files and tools. It can inspect a project, make...
Getting started with Codex: your first checked project change
Install a supported Codex client, sign in, open the intended project and begin with a small task. This walkthrough uses the...
Codex app, CLI, IDE and cloud: choose your workbench
Choose a Codex surface based on where the project lives and how you want to inspect the work. Desktop supports visual project...
Codex AGENTS.md: give your repository a working brief
AGENTS.md gives Codex persistent project instructions such as source-of-truth files, build commands and verification...
Codex skills, MCP and plugins: what each one does
A skill teaches Codex a reusable procedure; MCP connects it to tools and resources; a plugin can package capabilities for...
Codex permissions: files, network access and approvals
Codex permissions determine which files, commands and network operations a run can access. Approval settings determine when it...
Codex code review and Git: inspect the change before it ships
Use Codex review to inspect a defined diff, then verify the resulting behavior with appropriate checks. Git separates working...
Codex automations and codex exec: repeat a checked workflow
Use desktop automations for supported recurring local tasks, or codex exec when your own scheduler or CI system should invoke...
Teams and controls
1 guideOpenAI API
2 guidesGetting started with the OpenAI API: one useful request
The OpenAI API lets your software send model requests and use the results inside an application or workflow. Start with the...
OpenAI API structured outputs, tools and agents: the basic loop
Structured outputs give a model response a defined shape. Function calling lets the model request an operation that your...