Codex
A software engineering agent that runs tasks in parallel sandboxes and opens pull requests.
Full Codex record →Head to head
Codex vs Gemini Code Assist
Codex (OpenAI) and Gemini Code Assist (Google) both sit in Coding. Gemini Code Assist is the cheaper entry point at from $19/mo. Gemini Code Assist shipped more tracked changes in the last 30 days (8 vs 2). Every value below comes from the latest crawl of the vendors' own pages.
| Attribute | Codex OpenAI | Gemini Code Assist |
|---|---|---|
| Segment | Coding | Coding |
| Version | Codex | 3.5 Flash |
| Entry cost | from $20/mo | from $19/mo |
| Pricing tiers | Plus $20 · Pro $200 · Business $25 · API free | Gemini Code Assist Standard (Monthly commitment) $22.79 · Gemini Code Assist Standard (12-month commitment) $19 · Gemini Code Assist Enterprise (Monthly commitment) $54 · Gemini Code Assist Enterprise (12-month commitment) $45 |
| Model stack | 5.6 Sol · Codex · GPT-4 · GPT-5.2 · GPT-5.2-Codex · GPT-5.4 · GPT-5.5 · GPT-5.6 · GPT-5.6 Luna · GPT-5.6 Sol · GPT-5.6 Terra · GPT-6 · GPT-6 Astra · GPT-6 Luna · GPT-6 Sol · GPT-Live · GPT-Live-1 · gpt-oss | Gemini · Gemini 3 Pro · Gemini 3.0 Flash · Gemini 3.1 Pro · Gemini 3.5 Flash |
| Context window | 400K tokens | 1M |
| Public API | ||
| Routes models | ||
| Changes / 30d | 2 | 8 |
| Origin | Global | Global |
| Capabilities | Codex CLI, Codex IDE extension, Codex cloud, Codex Micro, Code review, Security workbench, Code generation, Codex Security | Agent mode, Codebase awareness, IDE and CLI, Code customization, IP indemnification, Code completion, Code generation, Chat in IDE |
Gemini Code Assist
Code Assist brings Gemini into VS Code, JetBrains and Cloud consoles with a large free tier and codebase-aware enterprise plans.
Full Gemini Code Assist record →