Codex
A software engineering agent that runs tasks in parallel sandboxes and opens pull requests.
Full Codex record →Head to head
Codex vs GitHub Copilot
Codex (OpenAI) and GitHub Copilot (GitHub) both sit in Coding. GitHub Copilot is the cheaper entry point at Free tier · from $10/mo. GitHub Copilot shipped more tracked changes in the last 30 days (7 vs 2). Every value below comes from the latest crawl of the vendors' own pages.
| Attribute | Codex OpenAI | GitHub Copilot GitHub |
|---|---|---|
| Segment | Coding | Coding |
| Version | Codex | September 2026 releases |
| Entry cost | from $20/mo | Free tier · from $10/mo |
| Pricing tiers | Plus $20 · Pro $200 · Business $25 · API free | Free free · Pro $10 · Pro+ $39 · Max $100 |
| 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 | Claude 3.5 Sonnet · Claude 5 · Claude Fable 5 · Claude Fable 5.1 · Claude Haiku 4.5 · Claude Haiku 5.5 · Claude Opus 4.5 · Claude Opus 4.6 · Claude Opus 4.7 · Claude Opus 4.8 · Claude Opus 5 · Claude Opus 5.5 · Claude Sonnet 4 · Claude Sonnet 4.5 · Claude Sonnet 4.6 · Claude Sonnet 5 · Claude Sonnet 5.5 · Gemini 3 Pro · Gemini 3.6 Flash · Gemini 3.7 Flash · Gemini 3.8 Flash · Gemini 4 Argon · GPT-5 mini · GPT-5.2 · GPT-5.4 · GPT-5.5 · GPT-5.6 Luna · GPT-5.6 Sol · GPT-5.6 Terra · GPT-6 Astra · GPT-6 Luna · GPT-6 Sol · GPT-6.1 Sol · GPT-6.1 Terra · Grok 4.5 · Grok 4.5 Raptor mini · Grok 4.6 · Grok 4.7 · Kimi K2.7 Code · Kimi K3 · MAI-Code-1.1-Flash |
| Context window | 400K tokens | Varies by model |
| Public API | ||
| Routes models | ||
| Changes / 30d | 2 | 7 |
| Origin | Global | Global |
| Capabilities | Codex CLI, Codex IDE extension, Codex cloud, Codex Micro, Code review, Security workbench, Code generation, Codex Security | Inline completion, Agent mode, Code review, Copilot Workspace, MCP support, Code completions, Next edit suggestions, Chat |
GitHub Copilot
Inline completion, chat, code review and coding agents across VS Code, JetBrains and github.com.
Full GitHub Copilot record →