Claude Code vs OpenAI Codex
A field-by-field comparison of Claude Code (Anthropic) and OpenAI Codex (OpenAI): market position, cost, models, company funding, and enterprise security. Every metric links to its source.
Add more agents to this comparison| Field | Claude CodeAnthropic | OpenAI CodexOpenAI |
|---|---|---|
| Market | ||
| Attributed output | 12.5MPublic GitHub commits attributed to Claude | 5.1M PRsPublic pull requests from Codex cloud |
| Output signal | Estimate | Estimate |
| Agent-opened PRs | 4.2MPublic pull requests Claude Code opened | 5.1MPublic pull requests from Codex cloud |
| Business signal | $2.5B+Claude Code run-rate revenue · Feb 2026 | 5M+ weeklyWeekly Codex users · Jun 2026 |
| Users / reach | 300K+Anthropic business customers | 5M+ weeklyWeekly Codex users |
| npm demand floor / wk | 11.7M | 21.7M |
| GitHub stars | n/a | 126K |
| Cost | ||
| Entry price | $20/mo Pro | Included with eligible plans |
| Top self-serve | n/a | n/a |
| Pricing unit | Shared usage limits | Plan allowance and token credits |
| Token transparency | Task quota | Token rate card |
| Cost per task (AA) | $4.62Claude Code, Opus 4.8 (max), API retail, AA index 77.2 | $4.33Codex, GPT-5.5 (xhigh), API retail, AA index 65.3 |
| Break-even vs API | ~4 tasks/moPro at $20/mo vs $4.62/task API retail | n/a |
| Product | ||
| Surfaces | CLI, IDE, Desktop, Web, Cloud, Mobile | CLI, Cloud, Desktop, IDE, Web, Mobile |
| Model families | Claude Opus 5.5, Claude Fable 5.1, Claude Sonnet 5.5, Claude Sonnet 5, Claude Haiku | GPT-6.1 Sol, GPT-6 Astra, GPT-6 Sol, GPT-6 Luna, GPT-5.6 Sol, GPT-5.6 Terra, GPT-5.6 Luna |
| Providers | Anthropic | OpenAI |
| MCP | Yes | Yes |
| BYOK | Yes | Yes |
| License | Proprietary | Open source |
| Company | ||
| Ownership | Private | Private |
| Founded | 2021 | 2015 |
| Headquarters | San Francisco, CA | San Francisco, CA |
| Total raised | ~$132B | ~$180B |
| Most recent round | Series H, $65B (Apr 2026) | Series G, $122B (Mar 2026) |
| Enterprise | ||
| SSO / SCIM | Yes | Yes |
| Compliance | SOC 2 Type II, ISO 27001, HIPAA (BAA available), GDPR | SOC 2 Type II, GDPR, CSA STAR |
| Deployment | VPC / dedicated | Cloud-only |
| Trains on your code | Not trained on your code | Not trained on your code |
| Zero data retention | Enterprise tier | Enterprise tier |