# Aider vs OpenAI Codex (slim)

> OpenAI Codex has a score of 73.4 (BB) against Aider's 47.1 (D). Both do agent harness. The largest gap is maintenance & community, 74 points. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/aider-vs-openai-codex.md (~1,500 tokens) · this version ~330 tokens · JSON https://www.anchorterminal.com/compare/aider-vs-openai-codex.json · canonical https://www.anchorterminal.com/compare/aider-vs-openai-codex
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-05

OpenAI Codex has a score of 73.4 (BB) against Aider's 47.1 (D). Both do agent harness. The largest gap is maintenance & community, 74 points.

- Aider: D 47.1, rank #385 of 452 · https://www.anchorterminal.com/tools/aider.min.md
- OpenAI Codex: BB 73.4, rank #58 of 452 · https://www.anchorterminal.com/tools/openai-codex.min.md
- Pick Aider for nothing in particular. Pick OpenAI Codex for schema & documentation (+34), agent ergonomics (+15), security & auth (+23), maintenance & community (+74), transparency & trust (+18).

| Category | Aider | OpenAI Codex |
| --- | --- | --- |
| Reliability (16%) | 54 | 55 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 56 | 90 |
| Agent ergonomics (13%) | 65 | 80 |
| Security & auth (14%) | 59 | 82 |
| Payments & pricing (10%) | 60 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 13 | 87 |
| Transparency & trust (7%) | 65 | 83 |