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コード実行ツール利用
Codex CLI vs Pythagorawhich AI code agent should you pick in 2026?
OpenAI’s open-source terminal agent for refactors, audits and migrations.
CodeTool use
Codex CLI vs Pythagora — specs
| Spec | Codex CLI | Pythagora |
|---|---|---|
| Agent Rank | 70 / 100 (B) | 67 / 100 (B) |
| Autonomy | Semi-autonomous | Autonomous |
| Pricing | Free · OSS | Freemium · from $49 |
| Open source | Yes | Yes |
| Capabilities | Code, Tool use | Code, Tool use, Memory |
| Integrations | 2 apps | 2 apps |
| Verified | Verified | Verified |
| Released | Apr 2025 | Mar 2024 |
Agent Rank breakdown
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?
Pythagora
Agent Rank
67/ 100
- 自律性
- 9
- 機能
- 6
- 連携
- 4
- 料金
- 7
- 完成度
- 7
- 検証性
- 7
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
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
Pythagora
Pricing
Codex CLI
Open source
無料
CLI-native engineers
- +Apache-2.0 binary
- +BYO OpenAI / Anthropic key
- +Composable from Makefiles + scripts
Pythagora
Which one should you pick?
Pythagora
Pick Pythagora if you want the highest autonomy and the verification loop is in place.
Try Pythagora →Affiliate links. We may earn a commission at no extra cost to you.
Frequently asked
Should I pick Codex CLI or Pythagora in 2026?+
Pick Codex CLI if cost is the main constraint. Pick Pythagora if you want the highest autonomy and the verification loop is in place. Most working teams running both can use Codex CLI for primary work and Pythagora for the workflows where its specific strengths matter.
What's the price difference between Codex CLI and Pythagora?+
Codex CLI starts at Free · OSS; Pythagora starts at Freemium · from $49. Codex CLI is the cheaper entry option. For team deployments the TCO can differ — use the AI Agent Rank TCO calculator for your specific volume.
Which is more autonomous, Codex CLI or Pythagora?+
Pythagora is the more autonomous of the two (Autonomous vs Semi-autonomous). Higher autonomy ships throughput faster but requires verification loops in place — see our autonomous-vs-copilot framing for when each tier wins.
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Adjacent agents in the same category with overlapping capabilities — worth a side-by-side glance before you commit.
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 playVS Code と JetBrains 向けのオープンソースコーディングAIエージェント — 任意のモデルを接続し、プロンプトを自由にカスタマイズできます。
コード実行ツール利用メモリDemo · hover to play
See more alternatives: alternatives to Codex CLI · alternatives to Pythagora
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