# ChatGPT vs OpenAI Codex

> ChatGPT: OpenAI's AI assistant for writing, research, coding, image generation and voice chat
> OpenAI Codex: OpenAI's coding agent that writes, reviews and runs code from terminal, IDE, desktop or cloud

- ChatGPT profile: https://finderatlas.com/tools/chatgpt
- OpenAI Codex profile: https://finderatlas.com/tools/openai-codex
- Comparison page: https://finderatlas.com/compare/chatgpt-vs-openai-codex
- Last reviewed: October 2026

## Verdict

ChatGPT is listed under AI Assistants and OpenAI Codex under Coding AI. ChatGPT scores higher in FinderAtlas's editorial review (8.9 vs 8.5 out of 10), led by ecosystem & integrations. Both have a free plan or trial. Only ChatGPT is available on iOS and Android. Only OpenAI Codex is available on Linux, CLI and VS Code Extension and offers an API.

### Choose ChatGPT if

- You want a tool built for everyday questions, drafting and editing text, summarizing documents, coding help, data analysis and image generation in one assistant.
- One assistant covers text, voice, images, file analysis, search and coding.
- Free tier lets users try the service without a card.

### Choose OpenAI Codex if

- You want a tool built for delegating coding tasks to an agent.
- Included with ChatGPT plans, with a free tier and an $8 Go tier.
- Open-source CLI under the Apache-2.0 license.

## Pricing

| | ChatGPT | OpenAI Codex |
| --- | --- | --- |
| Pricing model | Freemium | Freemium |
| Free plan or trial | Yes | Yes |
| Starting price | $0 | $0 |

## Features

| Feature | ChatGPT | OpenAI Codex |
| --- | --- | --- |
| Chat with web search | Yes | Not listed |
| Voice mode | Yes | Not listed |
| Image generation | Yes | Not listed |
| File and image analysis | Yes | Not listed |
| Projects | Yes | Not listed |
| ChatGPT agent | Yes | Not listed |
| Codex | Yes | Not listed |
| Connectors and apps | Yes | Not listed |
| Codex CLI | Not listed | Yes |
| IDE extension | Not listed | Yes |
| Desktop app | Not listed | Yes |
| Cloud tasks | Not listed | Yes |
| Code review | Not listed | Yes |
| Non-interactive mode | Not listed | Yes |
| MCP, skills and plugins | Not listed | Yes |
| Subagents and web search | Not listed | Yes |
| Session resume and images | Not listed | Yes |
| Mobile remote control | Not listed | Yes |

## Platforms

| Platform | ChatGPT | OpenAI Codex |
| --- | --- | --- |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| iOS | Yes | No |
| Android | Yes | No |
| API | No | Yes |
| Browser Extension | No | No |
| Linux | No | Yes |
| CLI | No | Yes |
| VS Code Extension | No | Yes |
| JetBrains Plugin | No | Yes |

## ChatGPT strengths

- One assistant covers text, voice, images, file analysis, search and coding
- Free tier lets users try the service without a card
- Apps for web, iOS, Android, macOS and Windows with synced history
- Large ecosystem of connectors, projects and agent features
- Plans range from $8 to $500 per month, so users can match spend to usage

## ChatGPT limitations

- Free and Go usage limits are low and may include ads
- Pricing and model lineup change often, which makes limits hard to compare over time
- Answers can be wrong and need checking, especially for facts and citations
- The top Pro tiers cost $100 to $500 per month

## OpenAI Codex strengths

- Included with ChatGPT plans, with a free tier and an $8 Go tier
- Open-source CLI under the Apache-2.0 license
- Available in the terminal, VS Code-based editors, the ChatGPT desktop app and the cloud
- Supports MCP, skills, plugins and subagents
- API-key option lets teams pay at API rates instead of a subscription

## OpenAI Codex limitations

- Plus has message limits per five hours that vary widely by model
- Cloud features are not available on the API Key plan
- Higher usage needs Pro, which starts at $100 per month
- Free and Go plans offer only GPT-6 Luna in the desktop app

## FAQ

**Is ChatGPT better than OpenAI Codex?**

It depends on your workflow. ChatGPT is built for everyday questions, drafting and editing text, summarizing documents, coding help, data analysis and image generation in one assistant. OpenAI Codex is built for delegating coding tasks to an agent.

**What are the key feature differences between ChatGPT and OpenAI Codex?**

ChatGPT: OpenAI's AI assistant for writing, research, coding, image generation and voice chat. OpenAI Codex: OpenAI's coding agent that writes, reviews and runs code from terminal, IDE, desktop or cloud. ChatGPT is rated 4.0/5 from 1 user review.

**Does ChatGPT or OpenAI Codex have a free plan?**

Yes, both do. ChatGPT is freemium and OpenAI Codex is freemium, and each has a free plan or trial.

**Which is cheaper, ChatGPT or OpenAI Codex?**

Both can be used for free. Paid plans differ in limits and features, so compare the tiers in the pricing table above.