Codex vs Gemini Code Assist
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 10.1 for Gemini Code Assist, and ranks ahead in 93% of the answers that name both.
Choose Codex if…
- You want the brand AI engines rank higher (20.9 vs 10.1)
- AI answers describe it more positively (64% vs 24% positive)
- Strong for autonomous coding tasks
- Frequently included in top AI coding shortlists
Choose Gemini Code Assist if…
- You need ISO 27001 or ISO 27017 or ISO 27018 or ISO 27701 or ISO 42001 or SOC 1 or SOC 2 or SOC 3 or HIPAA or HITRUST CSF or FINMA or PCI-DSS v4.0.1 or CSA STAR coverage
- Strong fit for Google Cloud-centric organizations
- Deep cloud-native ties and multi-environment deployment
- GCP and Workspace integration
AI visibility side by side
Latest weekly run · Nov 3
| Metric | Codex | Gemini Code Assist |
|---|---|---|
| Visibility score | 20.9% | 10.1% |
| Change vs last week | New | New |
| Rank in AI Coding Assistants | #4 | #9 |
| Share of voice | 5.4% | 3.6% |
| Mentions this run | 28 | 19 |
| Positive in AI answers | 64% | 24% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Codex 0pp · Gemini Code Assist 0pp over 0 weekly runs.
Engine by engine
Codex leads on 2 of 3 engines
Head to head in AI answers
15 engine answers name both brands
| Prompt | Engine | Codex | Gemini Code Assist |
|---|---|---|---|
| What should an AI coding assistant integrate with? | ChatGPT | #4 | #6 |
| What are the best AI coding assistant tools in 2026? | Perplexity | #4 | #5 |
| Top AI coding assistant options for B2B SaaS companies | ChatGPT | #4 | #9 |
| Top AI coding assistant options for B2B SaaS companies | Perplexity | #4 | #6 |
| Compare the leading AI coding assistant platforms | ChatGPT | #4 | #5 |
| Compare the leading AI coding assistant platforms | Perplexity | #4 | #6 |
| Alternatives to the most popular AI coding assistant | Perplexity | #4 | #5 |
| Best AI coding assistant with AI features | ChatGPT | #1 | #7 |
| Which AI coding assistant vendors do analysts recommend? | ChatGPT | #3 | #8 |
| Which AI coding assistant vendors do analysts recommend? | AI Mode | #2 | #4 |
| Which AI coding assistant vendors do analysts recommend? | Perplexity | #11 | #4 |
| Official website of the top AI coding assistant vendors | ChatGPT | #2 | #6 |
Features, pricing & fit
| Dimension | Codex | Gemini Code Assist |
|---|---|---|
| Deployment | Cloud-hosted agent, with local CLI, IDE extension and desktop app surfaces. | Managed through Google Cloud |
| Compliance | — | ISO 27001, ISO 27017, ISO 27018, ISO 27701, ISO 42001, SOC 1, SOC 2, SOC 3, HIPAA, HITRUST CSF, FINMA, PCI-DSS v4.0.1, CSA STAR |
| Founded | 2025 | — |
| Best for | Software engineers who want an AI agent to handle coding tasks such as writing code and fixing bugs. | — |
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 Code Assist
- Strong fit for Google Cloud-centric organizations
- Deep cloud-native ties and multi-environment deployment
- GCP and Workspace integration
- Robust context window management in enterprise use
- Free trial available for paid offering
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Codex vs Gemini Code Assist”, https://slateindex.ai/compare/codex-vs-gemini-code-assist, data of Nov 3, 2026. Licence: CC BY 4.0.