CodexAI Coding Assistants
vs
GeminiAI Coding Assistants
Comparison · AI Coding Assistants · weekly run Nov 3
Codex vs Gemini
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Codex is the stronger AI pick in AI Coding Assistants: it has a visibility score of 20.9 versus 1.9 for Gemini, and ranks ahead in 100% of the answers that name both.
Choose Codex if…
- You want the brand AI engines rank higher (20.9 vs 1.9)
- Strong for autonomous coding tasks
- Frequently included in top AI coding shortlists
- Enterprise-scale engineering adoption
Choose Gemini if…
- You need ISO/IEC 27001 or ISO/IEC 27017 or ISO/IEC 27018 or ISO/IEC 27701 coverage
- Multi-model flexibility across OpenAI, Anthropic and Gemini
- Free software with pay-per-request cost
- Listed among strongest AI coding platforms
AI visibility side by side
Latest weekly run · Nov 3
| Metric | Codex | Gemini |
|---|---|---|
| Visibility score | 20.9% | 1.9% |
| Change vs last week | New | New |
| Rank in AI Coding Assistants | #4 | #21 |
| Share of voice | 5.4% | 1.1% |
| Mentions this run | 28 | 5 |
| Positive in AI answers | 64% | — |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Codex 0pp · Gemini 0pp over 0 weekly runs.
Engine by engine
Codex leads on 3 of 3 engines
ChatGPT
AI Mode
Perplexity
CodexGemini
Head to head in AI answers
4 engine answers name both brands
4Codex ranked higher
0Gemini ranked higher
| Prompt | Engine | Codex | Gemini |
|---|---|---|---|
| Compare the leading AI coding assistant platforms | ChatGPT | #4 | #11 |
| Best AI coding assistant with AI features | ChatGPT | #1 | #9 |
| Official website of the top AI coding assistant vendors | AI Mode | #3 | #5 |
| Official website of the top AI coding assistant vendors | Perplexity | #2 | #7 |
Features, pricing & fit
| Dimension | Codex | Gemini |
|---|---|---|
| Deployment | Cloud-hosted agent, with local CLI, IDE extension and desktop app surfaces. | Cloud service enabled in a Google Cloud project; developers authenticate to Google Cloud |
| Compliance | — | ISO/IEC 27001, ISO/IEC 27017, ISO/IEC 27018, ISO/IEC 27701 |
| Founded | 2025 | — |
| Headquarters | — | Mountain View, California, USA (Googleplex, parent Alphabet Inc.) |
| Employees | — | 5,000+ |
| Best for | Software engineers who want an AI agent to handle coding tasks such as writing code and fixing bugs. | Developers and teams using supported IDEs who want AI coding help within Google Cloud |
Pros and cons
Themes from the AI answers that mention each brand
Codex
- Strong for autonomous coding tasks
- Frequently included in top AI coding shortlists
- Enterprise-scale engineering adoption
- Deterministic multi-step task execution for OpenAI-first teams
- Delegated engineering tasks, code review, and cloud or parallel agent workflows
- Appears less consistently in enterprise analyst lists
Gemini
- Multi-model flexibility across OpenAI, Anthropic and Gemini
- Free software with pay-per-request cost
- Listed among strongest AI coding platforms
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Codex vs Gemini”, https://slateindex.ai/compare/codex-vs-gemini, data of Nov 3, 2026. Licence: CC BY 4.0.