OpenAI Codex vs Replit:Which is more popular?
In September 2026, Replit had more branded searches than OpenAI Codex among AI coding agents worldwide. Replit had about 1.5 million branded searches, while OpenAI Codex had 992,000. Replit made up 21.1% of all AI coding agent searches we track, and OpenAI Codex accounted for 13.7%. When we asked ChatGPT and Google AI Overviews about AI coding agents, OpenAI Codex appeared in all five answers and Replit in one. OpenAI Codex was mentioned before Replit in every answer.
Who do people search for more?
Replit, about 54% more searches than OpenAI Codex
Who does AI mention more?
OpenAI Codex, mentioned in every answer we collected
Who does AI recommend more?
OpenAI Codex, named ahead of Replit in every answer
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Top AI coding agents in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, OpenAI Codex appeared in all five answers. Replit was mentioned in one out of five: in one of the three ChatGPT answers, but not in either of the two Google AI Overviews. OpenAI Codex was listed before Replit in every answer.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
Claude Code1st
Cursor2nd- OpenAI Codex3rd
GitHub Copilot4th- Replit5th
Devin5th
Windsurf–
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- Claude Code5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- OpenAI Codex5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Cursor5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- GitHub Copilot4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Replit1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Devin1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Windsurf0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about AI coding agents
5 answers
Asked ChatGPT
“Which AI coding agent should I use?”
Asked ChatGPT
“What are the best AI coding agents?”
Asked ChatGPT
“What's the best AI coding agent for code written and edited?”
Searched Google, AI Overview
“ai coding agent”
Searched Google, AI Overview
“agentic coding tool”
Not named in any answer:
Brands are shown in the order each answer named them. The survey took place in the United States on October 20, 2026.
Is OpenAI Codex or Replit more popular in search?
This chart shows how often people search Google for OpenAI Codex and Replit by name. Each line represents a brand's share of searches for all seven AI coding agents we track, month by month, from English-language searches worldwide.
Share of searches by month for Replit, OpenAI Codex. The figures are in the table below the chart.
View monthly share of searches table
| Month | Claude Code | Replit | OpenAI Codex | Cursor | GitHub Copilot | Devin | Windsurf |
|---|---|---|---|---|---|---|---|
| Oct 2025 | 25.3% | 25.6% | 8% | 18% | 17.3% | 2.7% | 3.2% |
| Nov 2025 | 28.4% | 23.2% | 6.6% | 19.7% | 15.8% | 2.8% | 3.4% |
| Dec 2025 | 31.7% | 27% | 5.4% | 15.7% | 14.8% | 2.7% | 2.7% |
| Jan 2026 | 51.2% | 20.1% | 4.2% | 11.8% | 9.4% | 1.7% | 1.7% |
| Feb 2026 | 50.5% | 16.3% | 11.5% | 9.6% | 9.2% | 1.4% | 1.5% |
| Mar 2026 | 56.8% | 14.8% | 7% | 8.7% | 10% | 1.4% | 1.3% |
| Apr 2026 | 55.1% | 14.3% | 8% | 8.2% | 11.6% | 1.6% | 1.2% |
| May 2026 | 48.8% | 15.7% | 14.5% | 7.7% | 10.2% | 1.9% | 1.2% |
| Jun 2026 | 49.2% | 15.7% | 11% | 10.9% | 9.1% | 2.5% | 1.6% |
| Jul 2026 | 46.6% | 18.4% | 14.7% | 9.1% | 7.1% | 2.9% | 1.3% |
| Aug 2026 | 43.4% | 21% | 13.2% | 10.2% | 7.9% | 3.3% | 1.1% |
| Sep 2026 | 43.3% | 21.1% | 13.7% | 8.5% | 8.1% | 4% | 1.2% |
How has the OpenAI Codex and Replit comparison changed over the last 12 months?
3 findings
- Replit was ahead of OpenAI Codex in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, OpenAI Codex’s share of searches among AI coding agents worldwide moved from 8% to 13.7%, and its estimated monthly branded searches moved from 386K to 992K.
- Across the 12 months ending September 2026, Replit’s share of searches among AI coding agents worldwide moved from 25.6% to 21.1%, and its estimated monthly branded searches moved from 1.2M to 1.5M.
How did search popularity change for AI coding agents worldwide in September 2026?
2 changes
In September 2026, OpenAI Codex gained share of searches among AI coding agents worldwide, from 13.2% to 13.7%.
Replit’s share of searches among AI coding agents worldwide has gained ground for 3 months in a row, from 15.7% to 21.1% in September 2026.
How are branded searches counted?
25 search terms
Brandwave collects information about searches that people make online using OpenAI Codex’s and Replit’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.
OpenAI Codex
23 branded search terms
- ai codex
- chatgpt codex
- codex agent
- codex ai
- codex ai coding
- codex app
- codex chatgpt
- codex cli
- codex coding
- codex desktop
- codex extension
- codex github
- codex ide
- codex mac
- codex open ai
- codex openai
- codex vscode
- open ai codex
- openai codex
- openai codex cli
- openai codex github
- openai's codex
- openaicodex
Replit
2 branded search terms
- replit
- replit agent
Other head-to-heads among AI coding agents
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