ChatGPTAI Coding Assistants
vs
CodexAI Coding Assistants
Comparison · AI Coding Assistants · weekly run Nov 3
ChatGPT vs Codex
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 7.1 for ChatGPT, and ranks ahead in 90% of the answers that name both.
Choose ChatGPT if…
- You need SOC 2 Type 2 coverage
- strong performance on complex tasks like research and deep context
- general-purpose work
- coding agent available across ChatGPT, desktop, web, CLI and IDE workflows
Choose Codex if…
- You want the brand AI engines rank higher (20.9 vs 7.1)
- AI answers describe it more positively (64% vs 0% positive)
- Strong for autonomous coding tasks
- Frequently included in top AI coding shortlists
AI visibility side by side
Latest weekly run · Nov 3
| Metric | ChatGPT | Codex |
|---|---|---|
| Visibility score | 7.1% | 20.9% |
| Change vs last week | New | New |
| Rank in AI Coding Assistants | #13 | #4 |
| Share of voice | 2.3% | 5.4% |
| Mentions this run | 12 | 28 |
| Positive in AI answers | 0% | 64% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
ChatGPT 0pp · Codex 0pp over 0 weekly runs.
Engine by engine
Codex leads on 3 of 3 engines
ChatGPT
AI Mode
Perplexity
ChatGPTCodex
Head to head in AI answers
10 engine answers name both brands
1ChatGPT ranked higher
9Codex ranked higher
| Prompt | Engine | ChatGPT | Codex |
|---|---|---|---|
| What are the best AI coding assistant tools in 2026? | ChatGPT | #5 | #4 |
| Best AI coding assistant for startups | ChatGPT | #5 | #4 |
| Compare the leading AI coding assistant platforms | ChatGPT | #9 | #4 |
| Compare the leading AI coding assistant platforms | Perplexity | #8 | #4 |
| Best AI coding assistant with AI features | ChatGPT | #3 | #1 |
| Best AI coding assistant with AI features | Perplexity | #5 | #4 |
| Which AI coding assistant offers a free trial? | ChatGPT | #6 | #5 |
| Which AI coding assistant tools offer annual discounts? | ChatGPT | #5 | #6 |
| Where can I sign up for an AI coding assistant? | ChatGPT | #5 | #4 |
| Where can I sign up for an AI coding assistant? | Perplexity | #4 | #3 |
Features, pricing & fit
| Dimension | ChatGPT | Codex |
|---|---|---|
| Deployment | — | Cloud-hosted agent, with local CLI, IDE extension and desktop app surfaces. |
| Compliance | SOC 2 Type 2 | — |
| Founded | — | 2025 |
| Headquarters | San Francisco | — |
| Employees | 1,001–5,000 | — |
| Funding | In progress, seeking up to $20 billion, reported at $1.25 trillion post-money | — |
| 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
ChatGPT
- strong performance on complex tasks like research and deep context
- general-purpose work
- coding agent available across ChatGPT, desktop, web, CLI and IDE workflows
- higher price point
- access depends on eligible paid plan
- limited usage on the free plan
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
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “ChatGPT vs Codex”, https://slateindex.ai/compare/chatgpt-vs-codex, data of Nov 3, 2026. Licence: CC BY 4.0.