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Codex · AI work partner

Codex Free Guide: Make Codex Your AI Work Partner

Learn how to start with Codex and use it for practical work. Describe a report, dataset, slide deck, or web page in plain language — Codex plans the steps, builds files, and hands you deliverables you can use.

Start with CodexWhat is Codex?

Independent informational site. Not affiliated with OpenAI.

Your request

  • Browser-based
  • No install
  • Real deliverables
  • Plain language
  • AI work partner
Report: Read weekly_metrics.csv and produce an 8-slide HTML executive summary. Brand colResearch: Clean interview_notes.txt and survey.csv — tag themes, count mentions, output a Slides: Build a 15-slide quarterly review from this outline. HTML slides 16:9, then PDF Commerce: From catalog.csv, generate Shopee + Lazada titles and short descriptions for eac
Report

Meet your partner

What is Codex?

Codex is an AI work partner built into ChatGPT and developer tools. Unlike everyday chat, Codex takes a job end-to-end: understand your materials, plan the work, create files (HTML, PDF, PPT, scripts, code), run commands, check results, and revise when you ask.

Two ways to work together. Cloud Codex runs in your browser — connect GitHub or upload context, delegate tasks, get pull requests or downloadable outputs. Local Codex runs in VS Code, Cursor, or Windsurf with access to your folders and terminal — ideal when your files live on your machine.

Read OpenAI's Codex announcement →

Cloud CodexLocal Codex
Where it runsBrowser / ChatGPTVS Code, Cursor, Windsurf
SetupSign in — no installIDE extension
Best forDelegated tasks, async deliveryFiles on your computer
Your materialsRepos, uploads, linksLocal folders & terminal
Typical outputPR, files, exportsEdited files & exports
Who uses itAnyone with ChatGPTPower users & developers
Open Codex in ChatGPT

Comparison

Codex vs everyday ChatGPT

ChatGPT is great for conversation. Codex is built to complete work and hand you deliverables.

CapabilityCodexChatGPT chatManual
Included on free plan✓ Yes✓ Yes✓ Yes
Produces files & exports✓ YesLimited✓ Yes
Runs multi-step workflows✓ Yes✗ No✓ Yes
Works across your materials✓ YesLimited✓ Yes
Verifies its own output✓ Yes✗ NoSometimes
You only describe the goal✓ YesPartial✗ No

Who it's for

A partner for every kind of work

You bring judgment and taste — Codex brings speed, structure, and follow-through.

  • Data analysts — Turn messy exports into clean tables, charts, and narrative summaries for stakeholders

    Data analysts

    Turn messy exports into clean tables, charts, and narrative summaries for stakeholders

  • Office & reports — Outline → slide HTML → PDF or PPT — weekly updates and board decks without starting from a blank page

    Office & reports

    Outline → slide HTML → PDF or PPT — weekly updates and board decks without starting from a blank page

  • Market researchers — Organize survey data, tag themes, and draft insight briefs from raw notes and spreadsheets

    Market researchers

    Organize survey data, tag themes, and draft insight briefs from raw notes and spreadsheets

  • Designers — Batch-rename assets, generate spec pages, and keep handoff docs in sync with your design system

    Designers

    Batch-rename assets, generate spec pages, and keep handoff docs in sync with your design system

  • E-commerce — Bulk product titles, multi-platform descriptions, and inventory sheets from one source of truth

    E-commerce

    Bulk product titles, multi-platform descriptions, and inventory sheets from one source of truth

  • Video creators — Subtitle pipelines, title packs, chapter markers, and batch export scripts for your edit workflow

    Video creators

    Subtitle pipelines, title packs, chapter markers, and batch export scripts for your edit workflow

How Codex helps

More than answers — finished work

Tell Codex what “done” looks like. It figures out the steps, produces deliverables, and stays with you until the result matches your brief.

Understands the brief: Explain outcomes in everyday language — structure, tone, data sources, and what success looks like. No jargon required.

Understands the brief

Explain outcomes in everyday language — structure, tone, data sources, and what success looks like. No jargon required.

Delivers real files: HTML slide decks, PDF exports, cleaned CSVs, scripts, docs, and code — not just suggestions in a chat window.

Delivers real files

HTML slide decks, PDF exports, cleaned CSVs, scripts, docs, and code — not just suggestions in a chat window.

Works until it's right: Ask for changes: swap Q2 for Q3, tighten the summary, fix a chart. Codex revises the work, not just the advice.

Works until it's right

Ask for changes: swap Q2 for Q3, tighten the summary, fix a chart. Codex revises the work, not just the advice.

Data & research: Summarize surveys, join spreadsheets, spot trends, and turn raw inputs into insight-ready tables and narratives.

Data & research

Summarize surveys, join spreadsheets, spot trends, and turn raw inputs into insight-ready tables and narratives.

Pages & presentations: Generate on-brand HTML slides, then export to PDF or PPT — a solid first draft you can polish or present.

Pages & presentations

Generate on-brand HTML slides, then export to PDF or PPT — a solid first draft you can polish or present.

Easy to start: Core Codex access is included on ChatGPT's free plan — try a real work partner before you decide on a paid upgrade.

Easy to start

Core Codex access is included on ChatGPT's free plan — try a real work partner before you decide on a paid upgrade.

Use cases

Work Codex can take on

From weekly reports to product listings — you set the goal, Codex does the heavy lifting.

Weekly report → PDF — Feed sales CSV and a outline — Codex builds a branded HTML deck and exports a PDF ready to email.
01/08

Weekly report → PDF

Feed sales CSV and a outline — Codex builds a branded HTML deck and exports a PDF ready to email.

Survey cleanup & insights — Upload questionnaire exports — Codex removes invalid rows, segments by cohort, and drafts a one-page insight summary.
02/08

Survey cleanup & insights

Upload questionnaire exports — Codex removes invalid rows, segments by cohort, and drafts a one-page insight summary.

Slide deck from a brief — Describe chapters and key messages — Codex generates slide HTML with your colors and fonts, then outputs PDF or PPTX.
03/08

Slide deck from a brief

Describe chapters and key messages — Codex generates slide HTML with your colors and fonts, then outputs PDF or PPTX.

E-commerce listing batch — One master sheet → platform-specific titles, bullets, and SEO fields for dozens of SKUs.
04/08

E-commerce listing batch

One master sheet → platform-specific titles, bullets, and SEO fields for dozens of SKUs.

Research synthesis — Combine interview notes and competitor pages into a structured comparison table and executive summary.
05/08

Research synthesis

Combine interview notes and competitor pages into a structured comparison table and executive summary.

Landing page from copy — Paste marketing copy — Codex produces a responsive static page you can preview, tweak, and host.
06/08

Landing page from copy

Paste marketing copy — Codex produces a responsive static page you can preview, tweak, and host.

Video metadata pack — From a transcript: chapters, descriptions, tags, and thumbnail text variants for upload.
07/08

Video metadata pack

From a transcript: chapters, descriptions, tags, and thumbnail text variants for upload.

Engineering tasks — For dev teams: bug fixes, APIs, tests, and refactors — Codex still shines when the deliverable is code.
08/08

Engineering tasks

For dev teams: bug fixes, APIs, tests, and refactors — Codex still shines when the deliverable is code.

How it works

Get work done in 3 steps

  1. Codex
    Sign in with ChatGPT
    you [at] email.com
    Continue free
    Free tier — Codex, your AI work partner
    Step 1

    Describe the outcome

    Open Codex in ChatGPT. Say what you need, who it's for, and what “done” looks like — format, length, data sources.

  2. Build an 8-slide HTML report from sales.csv — export PDF when done

    CSVSlidesPDF
    Step 2

    Codex does the work

    Your partner plans steps, creates files, runs scripts, and checks output — you can watch progress and nudge along the way.

  3. Example Codex deliverable preview — report slides ready to download as PDF
    Download PDF
    Step 3

    Review & refine

    Download or preview deliverables. Ask for edits until it matches your brief — then ship, present, or publish.

Open Codex in ChatGPT

Task examples

Copy-ready requests

Paste these into Codex — then swap in your data, brand rules, and tone.

Reports

“Read sales_q2.csv and build a 10-slide HTML report (16:9, navy #003366). Sections: overview, top regions, risks. Export PDF.”

Try this task →

Data

“Clean survey_export.csv: drop incomplete rows, segment by age band, chart satisfaction scores, output summary.md.”

Try this task →

Slides

“From this outline, generate a 12-page slide HTML using brand.css, then export PDF and a python-pptx PPTX draft.”

Try this task →

Commerce

“From products_master.csv, write Taobao + Amazon titles and 5 bullet points per SKU. Respect each platform's character limits.”

Try this task →
Browse tutorial & task examples →

FAQ

Working with Codex — FAQ

Independent guide — not affiliated with OpenAI.

Do I need an OpenAI account?

Yes — sign in with a free ChatGPT account at chatgpt.com. Cloud Codex runs in your browser with no separate install.

Do I need a credit card to start?

No credit card is required to start on ChatGPT's free plan. Codex is included with usage limits. Upgrading to Plus is optional when you need more.

Do I need to know how to code?

No. Describe outcomes in plain language — “make a PDF report from this CSV.” Codex handles scripts and files behind the scenes. Developers can go deeper; everyone else can stay at the goal level.

Can Codex make slides or PDFs?

Yes. A common flow: Codex builds structured HTML slides with your styles, then exports PDF or generates PPTX. You review and ask for revisions like any collaborator.

How is Codex different from ChatGPT chat?

ChatGPT excels at conversation and drafts. Codex is oriented toward completion — it creates files, runs workflows, and iterates until the deliverable matches your brief.

Is Codex available without a paid plan?

Yes — Codex is included on ChatGPT's free plan with usage limits. This site is an independent guide; we are not OpenAI and do not set pricing.

What tasks work best?

Clear goals with concrete deliverables: a report, a cleaned dataset, a slide deck, a page, a batch of listings. The more specific your brief, the better your partner performs.

Go deeper

Ready to work with Codex?

Open Codex in ChatGPT — describe your task, review deliverables, refine until it's right.

Start with Codex