Quick Verdict
OpenAI Codex leads on SWE-bench (72.8% vs -)
Pricing
| pi.dev | OpenAI Codex | |
|---|---|---|
| Price | Free (BYO keys) | $20-200/mo |
| Open source | Yes ✅ | Yes ✅ |
| Best for | Long-running knowledge-backed agents | Parallel task execution |
Performance & Benchmarks
pi.dev scores - and OpenAI Codex scores 72.8% on SWE-bench. Here’s what that actually means for daily use.
pi.dev is built for long-running knowledge-backed agents. It’s open source with Free (BYO keys) pricing.
OpenAI Codex is built for parallel task execution. It’s open source with $20-200/mo pricing. SWE-bench: 72.8%
Feature Comparison
| Feature | pi.dev | OpenAI Codex |
|---|
Pros & Cons
pi.dev
Pros:
- Persistent knowledge graphs
- Scheduled tasks
- Background agents
Cons:
- No git integration
- No plugin system
OpenAI Codex
Pros:
- Parallel Git worktree execution
- Cloud sandboxed agents
- Included in ChatGPT Plus
Cons:
- OpenAI models only
- Cloud-dependent for parallel mode
Verdict
OpenAI Codex leads on SWE-bench (72.8% vs -)
pi.dev is recommended for: Knowledge-intensive long-running agent tasks OpenAI Codex is recommended for: Parallel ticket processing and batch tasks
For a full overview of all 15 agents, see the Complete Guide to AI Coding Agents.