Google Gemini vs OpenAI Codex: Complete Comparison (2026)
An in-depth comparison of Google Gemini and OpenAI Codex to help you choose the right tool for your business.
Last updated: November 2026
Google Gemini
7.2/10
Google's family of generative AI models and assistants, sold to businesses through Gemini Enterprise, Workspace plans and a pay-per-token developer API.
OpenAI Codex
6.8/10
OpenAI Codex is an AI coding agent that writes, edits and reviews code across a CLI, IDE extension, desktop app, web and cloud tasks, for developers and engineering teams.
Feature-by-Feature Comparison
| Feature | | O OpenAI Codex |
|---|---|---|
| Scores | ||
| Overall Rating | 7.2/10 | 6.8/10 |
| Integration | 7/10 | 7/10 |
| Analytics | 5/10 | 5/10 |
| Customization | 8/10 | 7/10 |
| Ease of Use | 7/10 | 7/10 |
| Support | 5/10 | 4/10 |
| Cost | 7/10 | 7/10 |
| Scalability | 9/10 | 6/10 |
| Security | 8/10 | 8/10 |
| Output Quality | 8/10 | 8/10 |
| Pricing | ||
| Free plan | Yes | Yes |
| Cheapest paid plan | $21/user/mo Gemini Enterprise Business | $8/mo Go |
| Estimated cost for 10 users | $210/mo Gemini Enterprise Business | Free Free |
| Features | ||
| AI Agents | ||
| API Access | ||
| Code Generation | ||
| Enterprise Controls | ||
| Image Generation | Not listed | |
| Knowledge Base Search | Not listed | |
| Text Generation | Not listed | |
| Video Generation | Not listed | |
| Voice and Audio | Not listed | |
| Workflow Automation | Not listed | |
Google Gemini vs OpenAI Codex cost by team size
OpenAI Codex costs less at every team size we checked.
| Team size | Google Gemini | OpenAI Codex |
|---|---|---|
| 1 user | $21/moGemini Enterprise Business | FreeFree |
| 5 users | $105/moGemini Enterprise Business | FreeFree |
| 10 users | $210/moGemini Enterprise Business | FreeFree |
| 25 users | $525/moGemini Enterprise Business | FreeFree |
| 50 users | $1,050/moGemini Enterprise Business | FreeFree |
The plan that fits each team size, billed monthly, before add-ons and usage charges. Each cost opens that tool's pricing calculator for the team size.
Which One Should You Choose?
Why choose Google Gemini
- Higher Scalability score (9/10 vs 6/10)
- Higher Customization score (8/10 vs 7/10)
- Better fit for marketing teams (6/10 vs 2/10)
- Better fit for small business (7/10 vs 5/10)
OWhy choose OpenAI Codex
- Lower estimated cost for 10 users: Free vs $210/mo
Pros & Cons
Google Gemini
Pros
- Many API models have a free tier, and Flash-Lite models cost from $0.10 to $0.30 per million input tokens.
- It is built into Gmail, Docs, Sheets, Meet and Drive for Workspace customers, starting with the €6.80 Starter plan.
- The Standard edition adds VPC Service Controls, customer-managed encryption keys and data-residency controls.
- The self-serve Business edition includes connectors to Microsoft 365, HubSpot and Jira as well as Google tools.
Cons
- Licensing is fragmented across Gemini Enterprise, Workspace, consumer AI plans and the API, and Plus has no public price.
- Users report unclear usage limits and silent downgrades from Pro to lighter models.
- Several API prices are scheduled to double in December 2026 and January 2027.
- Reviewers say third-party connectors to Salesforce, SAP and ServiceNow are less mature than Microsoft Copilot's.
OOpenAI Codex
Pros
- Comes with existing ChatGPT plans, including a free tier and an $8 Go plan, so trying it costs little or nothing.
- Works across a CLI, IDE, desktop app, web, iOS and sandboxed cloud tasks, so developers can stay in their usual environment.
- Business plans include SAML SSO, MFA and admin controls, and business data is not used for training by default.
- Enterprise adds SCIM, EKM, RBAC, Compliance API audit logs and data residency for regulated organizations.
- Credits let teams keep working after hitting included limits instead of waiting for the window to reset.
Cons
- Usage limits are published only as wide ranges per five-hour window, which makes capacity hard to predict.
- In 2026 users repeatedly reported quotas draining far faster than expected, which forced OpenAI to reset limits for everyone.
- Forum users say the usage dashboard was buggy or delayed and support replies were generic.
- Fast and Ultrafast modes use included usage 2.5 to 8 times faster.
- Running Codex with an API key gives up the cloud features.
Not sold on either?
Frequently Asked Questions
Google Gemini scores higher on our AI Software criteria: 7.2/10 against 6.8/10 for OpenAI Codex. The largest gap is in Scalability: 9/10 for Google Gemini and 6/10 for OpenAI Codex.
OpenAI Codex costs less for 10 users: free on its Free plan, against about $210/mo on its Gemini Enterprise Business plan for Google Gemini, billed monthly.
Yes, both Google Gemini and OpenAI Codex have a free plan.
Google Gemini is the better fit for marketing teams: we rate it 6/10 for them, against 2/10 for OpenAI Codex.
