IDE 内で動作するオープンソースの自律的なコーディングエージェントです。
コード実行ツール利用ブラウザ操作
Demo · hover to play
Aider vs Codex CLIwhich AI code agent should you pick in 2026?
OSS terminal coding assistant — pair-programs, edits in place, commits as you go.
CodeTool use
Aider vs Codex CLI — specs
| Spec | Aider | Codex CLI |
|---|---|---|
| Agent Rank | 70 / 100 (B) | 70 / 100 (B) |
| Autonomy | Semi-autonomous | Semi-autonomous |
| Pricing | Free · OSS | Free · OSS |
| Open source | Yes | Yes |
| Capabilities | Code, Tool use | Code, Tool use |
| Integrations | 2 apps | 2 apps |
| Verified | Verified | Verified |
| Released | Jan 2025 | Apr 2025 |
Agent Rank breakdown
Aider
Agent Rank
70/ 100
- 自律性
- 8
- 機能
- 4
- 連携
- 4
- 料金
- 10
- 完成度
- 6
- 検証性
- 10
自律性、機能、連携、料金、成熟度、編集部の検証を基に自動算出。デプロイごとに更新されます。 どのように算出されているか?
Codex CLI
Agent Rank
70/ 100
- 自律性
- 8
- 機能
- 4
- 連携
- 4
- 料金
- 10
- 完成度
- 6
- 検証性
- 10
自律性、機能、連携、料金、成熟度、編集部の検証を基に自動算出。デプロイごとに更新されます。 どのように算出されているか?
Pros & cons
Aider
メリット
- +Best-in-class pair-programming flow in the terminal
- +Repo map mode handles surprisingly large codebases
- +Provider-agnostic — bring any LLM that supports tool use
デメリット
- −No UI — pure CLI is a deal-breaker for some teams
- −Token spend at heavy use rivals a paid SaaS plan
- −Less polished autonomy than Devin or Replit Agent
Codex CLI
メリット
- +Zero-install terminal workflow — agent where engineers already live
- +Open source under permissive license; auditable end-to-end
- +Ideal for one-shot refactors, audits, and migrations
デメリット
- −No long-running session UI; not built for hour-long autonomous work
- −Less polished than IDE-native alternatives
- −You wire the model key + handle rate limits
Pricing
Aider
Open source
無料
Everyone
- +Apache-2.0 license
- +BYO model key (any provider)
- +Voice mode, repo map, auto-commit
Codex CLI
Open source
無料
CLI-native engineers
- +Apache-2.0 binary
- +BYO OpenAI / Anthropic key
- +Composable from Makefiles + scripts
Which one should you pick?
Codex CLI
Pick Codex CLI if its specific capabilities (Code, Tool use) match what you need.
Try Codex CLI →Affiliate links. We may earn a commission at no extra cost to you.
Frequently asked
Should I pick Aider or Codex CLI in 2026?+
Pick Aider if its specific capabilities (Code, Tool use) match what you need. Pick Codex CLI if its specific capabilities (Code, Tool use) match what you need. Most working teams running both can use Aider for primary work and Codex CLI for the workflows where its specific strengths matter.
What's the price difference between Aider and Codex CLI?+
Both Aider and Codex CLI start in the same pricing range (Free · OSS vs Free · OSS). Total cost of ownership depends on your team size and volume — see the TCO calculator for your specific math.
Which is more autonomous, Aider or Codex CLI?+
Both Aider and Codex CLI are Semi-autonomous agents — neither has a meaningful autonomy advantage over the other. The decision should hinge on capabilities and pricing instead.
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コード実行ツール利用メモリDemo · hover to playAnthropic のターミナルエージェント — コンポーザブルでスクリプト対応、Claude の Tool Use ループを中核に構築されています。
コード実行ツール利用メモリDemo · hover to play
See more alternatives: alternatives to Aider · alternatives to Codex CLI
Want the real monthly cost at your volume? Run the TCO calculator →
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