Codex CLI vs Claude Code
Codex CLI と Claude Code をワークフロー、価格、プライバシー、モデル対応、用途で比較します。
情報確認日 2026年8月29日
Codex CLI
Codex CLI is evolving from a single terminal agent into a task orchestration surface. Cross-task references and interrupt hooks are meaningful for parallel work, provided teams maintain strong isolation and review.
Claude Code
Claude Code remains a leading terminal-native coding agent. The August 2026 cost and feedback tools make it more useful for teams operating Claude-based applications, not just editing repositories.
主な違い
ワークフロー
OpenAI Codex CLI is a terminal coding agent that combines repository editing and command execution with task-to-task coordination, parallel workflows, hooks, and the broader Codex platform.
Claude Code is Anthropic's terminal coding agent for repository work, subagents, hooks, MCP, and automation, with growing operational tooling for API cost analysis and feedback.
ローカルモデル
はい
いいえ
オープンソース
はい
いいえ
機能比較
| 項目 | Codex CLI | Claude Code |
|---|---|---|
| 主なワークフロー | OpenAI Codex CLI is a terminal coding agent that combines repository editing and command execution with task-to-task coordination, parallel workflows, hooks, and the broader Codex platform. | Claude Code is Anthropic's terminal coding agent for repository work, subagents, hooks, MCP, and automation, with growing operational tooling for API cost analysis and feedback. |
| タイプ | CLI コーディングエージェント | CLI コーディングエージェント |
| エディタ基盤 | CLI | CLI |
| 価格モデル | フリーミアム | フリーミアム |
| 開始価格 | $8 | $20 |
| 無料プラン | はい | いいえ |
| オープンソース | はい | いいえ |
| ローカルモデル | はい | いいえ |
| BYOK | はい | はい |
| 対応プラットフォーム | macOS, Linux, Windows, Terminal, Local project directories, VS Code-compatible IDE workflows via Codex IDE extension, Codex app, Codex SDK, GitHub Actions | macOS, Linux, Windows, Terminal, VS Code, Cursor, VS Code forks, JetBrains IDEs, Claude desktop app, GitHub Actions, Claude Agent SDK |
| モデル | gpt-5.5, gpt-5.4, gpt-5.4 mini, gpt-5.3-codex-spark, OpenAI API, Azure OpenAI, Amazon Bedrock, Ollama, LM Studio | Claude Opus 4.8, Claude Sonnet 4.6, Claude Haiku 4.5 |
| エンタープライズ機能 | Business workspace controls, SAML SSO, MFA, Codex seats, Workspace credits, SCIM, EKM, Role-based access control, User analytics, Domain verification, Audit logs, Compliance API usage monitoring, Data retention controls, Data residency controls, Managed configuration, Amazon Bedrock deployment option, FedRAMP-compatible local Codex configuration where supported | Team and Enterprise account administration, Central billing, Usage analytics, SSO support on organization plans, Admin controls, Enterprise deployment support, GitHub Actions integration, Claude Agent SDK access, Cloud provider deployment options, Security and compliance review through Anthropic enterprise channels |
| 向いている用途 | Terminal-first developers, Local repository editing, Multi-file bug fixes, Refactoring, Test generation, Codebase exploration, OpenAI model users, Developers who want configurable approvals and sandboxing, Teams already using ChatGPT or OpenAI API, Automation through Codex SDK or GitHub Actions | Terminal-first developers, Large refactors, Repository exploration, Debugging failing tests, Writing and updating tests, Code review preparation, Documentation automation, GitHub issue and PR workflows, Teams already using Claude, Developers who want a managed frontier-model coding agent |
| 向いていない用途 | Non-technical users who want a visual app builder, Developers whose main need is inline autocomplete, Teams that require a fully provider-neutral hosted product, Users who do not want to manage terminal setup or configuration, Projects where AI agents are not allowed to run shell commands, Workflows that require cloud Codex features while using only API-key authentication | Users who need local model execution, Developers who mainly want inline autocomplete, Non-technical users looking for a visual prompt-to-app builder, Teams requiring provider-agnostic model routing, Users who want a fully open-source coding agent, Projects where agentic shell actions are not allowed by security policy |
用途別の向き不向き
Codex CLI supports local model workflows.
Codex CLI lists more team or enterprise controls.
Codex CLI supports more model/provider options or BYOK-style workflows.
Codex CLI is marked as open source.
価格比較
Codex CLI
- Free$0 / month
Included Codex access for quick coding tasks with limited usage.
- Go$8 / month
Lightweight Codex usage for smaller coding tasks.
- Plus$20 / month
Includes Codex on web, CLI, IDE extension, and iOS, plus latest Codex models and credit extension.
- ProFrom $100 / month
Higher Codex usage limits than Plus, including Pro-only access to GPT-5.3-Codex-Spark research preview.
- API KeyUsage-based
Use Codex in CLI, SDK, or IDE extension with API token billing; cloud features are not included.
Claude Code
- API Pay-as-you-goUsage-based
Use Claude Code with a Claude Console account and pay standard Claude API token rates.
- Claude Pro$20 / month
$17/month when billed annually. Includes Claude Code with shared Claude plan usage limits.
- Claude Max 5x$100 / month
Higher individual usage tier with Claude Code included and about 5x Pro capacity per session.
- Claude Max 20x$200 / month
Highest individual usage tier with Claude Code included and about 20x Pro capacity per session.
- Claude Team$25+ / user/month
Team Standard starts at $25/user/month monthly or $20/user/month annually; Premium is available at higher usage and feature levels.
プライバシーとセキュリティ
Codex CLI
Codex CLI runs locally and can read project files, edit code, run commands, and persist local session history under CODEX_HOME unless configured otherwise. Data sent to models depends on authentication method, selected provider, ChatGPT workspace settings, API organization settings, MCP servers, and whether local OSS mode is used. Users should avoid exposing secrets in prompts, source files, command output, or connected tools, and should configure approvals, sandboxing, ignored paths, and history persistence for sensitive repositories.
Claude Code
Claude Code may process prompts, codebase context, command output, files, tool calls, and repository metadata to provide coding assistance. Privacy and retention depend on whether the user authenticates through a Claude subscription, Anthropic API, or cloud provider deployment such as Bedrock, Vertex AI, or Foundry. Users should keep secrets out of prompts and source files, use environment variables or secret stores, and review permissions before allowing agentic actions.
Codex CLI が向いている場合
- Terminal-first developers
- Local repository editing
- Multi-file bug fixes
- Refactoring
- Test generation
Claude Code が向いている場合
- Terminal-first developers
- Large refactors
- Repository exploration
- Debugging failing tests
- Writing and updating tests
Codex CLI を避けるべき場合
- Non-technical users who want a visual app builder
- Developers whose main need is inline autocomplete
- Teams that require a fully provider-neutral hosted product
- Users who do not want to manage terminal setup or configuration
- Projects where AI agents are not allowed to run shell commands
Claude Code を避けるべき場合
- Users who need local model execution
- Developers who mainly want inline autocomplete
- Non-technical users looking for a visual prompt-to-app builder
- Teams requiring provider-agnostic model routing
- Users who want a fully open-source coding agent