Coding agents
Aider vs Codex
Aider (Aider (open source)) and Codex (OpenAI) are two tools in the “Coding agents” category of the OrigoTech directory. This page puts the information from their tool pages side by side: 7 criteria are filled in for both tools. No editorial opinion: every value comes from the tool page, which cites its sources.
Tool page data · Verified
Comparison table
| Criterion | Aider | Codex |
|---|---|---|
| Vendor | Aider (open source) | OpenAI |
| Pricing | Free | Freemium |
| Pricing details | Free tool; you pay the provider of the model you pick (Anthropic, OpenAI, DeepSeek…) or run a local model (source: aider.chat). | Included in ChatGPT Free ($0), Go ($8), Plus ($20) and Pro (from $100/month), or billed per use with an API key (source: developers.openai.com/codex/pricing). |
| Plans and pricing | — |
|
| License | Apache-2.0 | Codex CLI under Apache-2.0 (github.com/openai/codex); cloud service and ChatGPT app proprietary |
| Open source | Yes | — |
| Platforms | CLI | CLI, IDE, Web, Desktop, Mobile |
| Operating systems | — | macOS, Windows, Linux |
| MCP support | — | Yes |
| Context window | Depends on the model and provider | 1,050,000 tokens with GPT-6.1 Sol (recommended model); depends on the selected model |
| Version | v0.86.0 | — |
| GitHub repository | Aider-AI/aider · ★ 49,663 · Verified | openai/codex · ★ 130,181 · Verified |
| Updated on |
“—”: information not filled in on the tool page.
What they have in common
- Shared platforms: CLI.
Differences
- Aider is published by Aider (open source), Codex by OpenAI.
- Pricing model: free for Aider, freemium for Codex.
- License: Apache-2.0 for Aider, Codex CLI under Apache-2.0 for Codex.
- Platforms only Codex offers: IDE, Web, Desktop, Mobile.
- GitHub repository: 49,663 stars for Aider, 130,181 for Codex (as of October 20, 2026).
Sources
- Aider: official site
- GitHub: Aider-AI/aider repository (Apache-2.0 license)
- GitHub: release v0.86.0 (Aug 9, 2025)
- OpenAI: 4 million weekly users (April 2026)
- OpenAI: Leader in the 2026 Gartner Magic Quadrant
- OpenAI: Codex pricing
- Codex CLI on GitHub (Apache-2.0 licence)
Tool pages and related pages
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