Gemini Notebook vs OpenAI Codex

Features, pricing, ratings, and pros and cons, side by side.

Gemini Notebook

Google's Gemini Notebook, formerly NotebookLM, answers questions and builds summaries from your own sources

Freemium

Visit website View details

OpenAI Codex

OpenAI's coding agent that writes, reviews and runs code from terminal, IDE, desktop or cloud

Freemium

Visit website View details

Verdict

Gemini Notebook is listed under AI Assistants and OpenAI Codex under Coding AI. Both have a free plan or trial. Only Gemini Notebook is available on iOS and Android. Only OpenAI Codex is available on Windows, macOS and Linux and offers an API.

Best overall

Gemini Notebook

Students
Researchers
Educators
Analysts

Choose Gemini Notebook if

You want a tool built for summarizing and questioning your own documents.
Answers cite the uploaded sources, so claims can be checked against the original text.
Free Standard tier with 100 notebooks and 50 sources per notebook.

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.

Best for beginners: Gemini Notebook
Best for business: OpenAI Codex

Features

19 features compared.

Source-grounded chat
Gemini Notebook
Available
OpenAI Codex
Not available
Audio Overviews
Gemini Notebook
Available
OpenAI Codex
Not available
Video Overviews
Gemini Notebook
Available
OpenAI Codex
Not available
Study tools
Gemini Notebook
Available
OpenAI Codex
Not available
Reports, slide decks and infographics
Gemini Notebook
Available
OpenAI Codex
Not available
Multiple source types
Gemini Notebook
Available
OpenAI Codex
Not available
Cloud computer
Gemini Notebook
Available
OpenAI Codex
Not available
Gemini app sync
Gemini Notebook
Available
OpenAI Codex
Not available
Sharing and public notebooks
Gemini Notebook
Available
OpenAI Codex
Not available
Codex CLI
Gemini Notebook
Not available
OpenAI Codex
Available
IDE extension
Gemini Notebook
Not available
OpenAI Codex
Available
Desktop app
Gemini Notebook
Not available
OpenAI Codex
Available
Cloud tasks
Gemini Notebook
Not available
OpenAI Codex
Available
Code review
Gemini Notebook
Not available
OpenAI Codex
Available
Non-interactive mode
Gemini Notebook
Not available
OpenAI Codex
Available
MCP, skills and plugins
Gemini Notebook
Not available
OpenAI Codex
Available
Subagents and web search
Gemini Notebook
Not available
OpenAI Codex
Available
Session resume and images
Gemini Notebook
Not available
OpenAI Codex
Available
Mobile remote control
Gemini Notebook
Not available
OpenAI Codex
Available

Pricing

Plans as listed by each vendor. Check their sites for current prices.

Pricing model
Gemini Notebook
Freemium
OpenAI Codex
Freemium
Free plan
Gemini Notebook
Yes
OpenAI Codex
Yes
Starting price
Gemini Notebook
$0
OpenAI Codex
$0
Plans
Gemini Notebook
5 plans
OpenAI Codex
7 plans

Gemini Notebook plans

Standard
$0
Free with a Google Account
- 100 notebooks
- 50 sources per notebook
- Audio Overviews
- Chat with citations
Plus
$4.99/month
Through the Google AI Plus subscription
- 200 notebooks
- 100 sources per notebook
- Early access to features
- 2x higher usage than Free
Pro
Most popular
$19.99/month
Through the Google AI Pro subscription
- 500 notebooks
- 300 sources per notebook
- Higher Gemini model access
- Priority access to new features
- Watermark removal
- 4x higher usage than Free
Ultra 5x
$99.99/month
Through the Google AI Ultra subscription
- 500 notebooks
- 500 sources per notebook
- Highest Gemini model access
- 5x higher usage limits than AI Pro
- Cloud computer for code execution
Ultra 20x
$199.99/month
Through the Google AI Ultra subscription at the higher tier
- 500 notebooks
- 600 sources per notebook
- Highest Gemini model access
- 20x higher usage limits than AI Pro
- Cloud computer for code execution

OpenAI Codex plans

Free
$0
Quick coding tasks
- GPT-6 Luna in the desktop app
- Subject to rollout
Go
$8/month
Lightweight coding tasks
- GPT-6 Luna in the desktop app
Plus
Most popular
$20/month
Focused coding sessions
- Web
- CLI
- IDE and iOS access
- Automatic code review and Slack
- GPT-6.1 Sol and GPT-6 Luna
- Can add credits
Pro
$100/month
Plans at $100, $200 or $500 per month
- Everything in Plus
- No five-hour limit currently
- Ultrafast mode on the $500 plan
Business
$25/user/mo
2 or more users; $20 per user per month when billed annually
- Desktop and mobile apps
- Larger cloud VMs
- Add-on credits
- SAML SSO and MFA
- No training on business data by default
Enterprise & Edu
Custom/user/mo
Contact sales
- Priority request processing
- SCIM
- EKM and RBAC
- User analytics
- Compliance API audit logs
- Retention and residency controls
API Key
Pay-as-you-go/usage
Billed at OpenAI API pricing
- Codex in the CLI
- SDK and IDE extension
- No cloud features
- Models depend on the API key

Our ratings

Scored out of 10 by the Finder Atlas editorial team. Last reviewed November 2026.

Gemini Notebook: 8.7overall
OpenAI Codex: 8.5overall

Gemini Notebook leads in 1 category and OpenAI Codex in 0.

Grounded Citation Fidelity
Gemini Notebook
8.8
OpenAI Codex
Not rated
Audio Overview Quality
Gemini Notebook
8.7
OpenAI Codex
Not rated
Source Handling
Gemini Notebook
8.6
OpenAI Codex
Not rated
Output Formats
Gemini Notebook
8.8
OpenAI Codex
Not rated
Value for Money
Gemini Notebook leads by 0.5
Gemini Notebook
8.5
OpenAI Codex
8.0
Code Generation
Gemini Notebook
Not rated
OpenAI Codex
9.0
Agentic Autonomy
Gemini Notebook
Not rated
OpenAI Codex
8.8
Ease of Use
Gemini Notebook
Not rated
OpenAI Codex
8.3
Ecosystem & Integrations
Gemini Notebook
Not rated
OpenAI Codex
8.5

Scores weigh documented features, plan value, platform coverage, integrations and user feedback. A missing score means we have not rated that area yet.

Pros and cons

Gemini Notebook

Pros

Answers cite the uploaded sources, so claims can be checked against the original text
Free Standard tier with 100 notebooks and 50 sources per notebook
Wide range of outputs, including Audio Overviews, Video Overviews, mind maps, flashcards, quizzes and slide decks
Accepts PDFs, websites, YouTube videos, audio files, Google Docs and Google Slides
Available on web, iOS and Android, and synced with the Gemini app

Cons

Works from the sources you add and is not built for live web news search
Higher limits require a Google AI subscription; Ultra starts at $99.99 per month
The cloud computer for code execution started with Ultra and Workspace AI Ultra Access customers, with Pro rollout still described as upcoming
No public API for the consumer product, and the renamed brand can make older guides and app listings confusing

OpenAI Codex

Pros

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

Cons

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

Platforms

Web
Gemini Notebook
Supported
OpenAI Codex
Supported
Windows
Gemini Notebook
Not supported
OpenAI Codex
Supported
macOS
Gemini Notebook
Not supported
OpenAI Codex
Supported
iOS
Gemini Notebook
Supported
OpenAI Codex
Not supported
Android
Gemini Notebook
Supported
OpenAI Codex
Not supported
API
Gemini Notebook
Not supported
OpenAI Codex
Supported
Browser Extension
Gemini Notebook
Not supported
OpenAI Codex
Not supported
Linux
Gemini Notebook
Not supported
OpenAI Codex
Supported
CLI
Gemini Notebook
Not supported
OpenAI Codex
Supported
VS Code Extension
Gemini Notebook
Not supported
OpenAI Codex
Supported
JetBrains Plugin
Gemini Notebook
Not supported
OpenAI Codex
Supported

Integrations

Gemini Notebook

4 integrations

Google Docs
Google Slides
YouTube
Gemini app

OpenAI Codex

8 integrations

GitHub
Slack
Visual Studio Code
Cursor
Windsurf
Xcode
JetBrains IDEs
MCP

Company

Company
Gemini Notebook
Google LLC
OpenAI Codex
Not listed
Founded
Gemini Notebook
1998
OpenAI Codex
Not listed
Headquarters
Gemini Notebook
Mountain View, CA
OpenAI Codex
Not listed
Monthly users
Gemini Notebook
30M+
OpenAI Codex
4M+ weekly users
Listing
Gemini Notebook
Claimed
OpenAI Codex
Not claimed

Featured AI Assistants

Picked by our editors. Not paid placement.

Frequently asked questions

Is Gemini Notebook better than OpenAI Codex?

It depends on your workflow. Gemini Notebook is built for summarizing and questioning your own documents. OpenAI Codex is built for delegating coding tasks to an agent.

What are the key feature differences between Gemini Notebook and OpenAI Codex?

Gemini Notebook: Google's Gemini Notebook, formerly NotebookLM, answers questions and builds summaries from your own sources. OpenAI Codex: OpenAI's coding agent that writes, reviews and runs code from terminal, IDE, desktop or cloud.

Does Gemini Notebook or OpenAI Codex have a free plan?

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

Which is cheaper, Gemini Notebook 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.

Verdict

Best overall

Choose Gemini Notebook if

Choose OpenAI Codex if

Features

Pricing

Gemini Notebook plans

Standard

Plus

Pro

Ultra 5x

Ultra 20x

OpenAI Codex plans

Free

Go

Plus

Pro

Business

Enterprise & Edu

API Key

Our ratings

Grounded Citation Fidelity

Audio Overview Quality

Source Handling

Output Formats

Value for Money

Code Generation

Agentic Autonomy

Ease of Use

Ecosystem & Integrations

Pros and cons

Gemini Notebook

Pros

Cons

OpenAI Codex

Pros

Cons

Platforms

Integrations

Gemini Notebook

OpenAI Codex

Company

Featured AI Assistants

Claude

DeepSeek

Google Gemini

Related comparisons

Gemini Notebook vs Claude

OpenAI Codex vs Claude

Gemini Notebook vs DeepSeek

OpenAI Codex vs DeepSeek

Gemini Notebook vs ChatGPT

OpenAI Codex vs ChatGPT

Frequently asked questions