Codex
A software engineering agent that runs tasks in parallel sandboxes and opens pull requests.
Full Codex record →Head to head
Codex vs Claude Code
Codex (OpenAI) and Claude Code (Anthropic) both sit in Coding. Claude Code shipped more tracked changes in the last 30 days (10 vs 2). Every value below comes from the latest crawl of the vendors' own pages.
| Attribute | Codex OpenAI | Claude Code Anthropic |
|---|---|---|
| Segment | Coding | Coding |
| Version | Codex | latest |
| Entry cost | from $20/mo | from $20/mo |
| Pricing tiers | Plus $20 · Pro $200 · Business $25 · API free | Pro $20 · Team (Standard seat) $25 · Team (Premium seat) $125 · Enterprise $20 |
| 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 · Fable 5 · Fable 5.1 · Haiku · Haiku 4.5 · Haiku 5.5 · Opus · Opus 5 · Opus 5.5 · Sonnet · Sonnet 3.5 · Sonnet 5 · Sonnet 5.5 |
| Context window | 400K tokens | Up to 1M varies by model |
| Public API | ||
| Routes models | ||
| Changes / 30d | 2 | 10 |
| Origin | Global | Global |
| Capabilities | Codex CLI, Codex IDE extension, Codex cloud, Codex Micro, Code review, Security workbench, Code generation, Codex Security | Terminal agent, Repo-wide edits, Subagents, MCP servers, Hooks, Background tasks, Agentic coding CLI, VS Code extension |
Claude Code
A terminal-native coding agent that reads, edits and runs code across a whole repository.
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