Quick Verdict
OpenAI Codex gives you full control — the classic OSS vs commercial trade-off.
Pricing
| OpenAI Codex | AmpCode | |
|---|---|---|
| Price | $20-200/mo | Pay-as-you-go (free tier ~$10/day) |
| Open source | Yes ✅ | No ❌ |
| Best for | Parallel task execution | Unconstrained agentic coding with multi-model routing |
Open Source vs Commercial
The open source vs commercial debate matters more for coding agents than most tools because your agent has access to everything.
OpenAI Codex is built for parallel task execution. It’s open source with $20-200/mo pricing. SWE-bench: 72.8%
AmpCode is built for unconstrained agentic coding with multi-model routing. It’s a commercial product with Pay-as-you-go (free tier ~$10/day) pricing.
Feature Comparison
| Feature | OpenAI Codex | AmpCode |
|---|
Pros & Cons
OpenAI Codex
Pros:
- Parallel Git worktree execution
- Cloud sandboxed agents
- Included in ChatGPT Plus
Cons:
- OpenAI models only
- Cloud-dependent for parallel mode
AmpCode
Pros:
- Multi-model routing
- Unconstrained token usage
- Free daily credits
Cons:
- Pay-as-you-go costs unpredictable
- Free tier closed to new signups
Verdict
OpenAI Codex gives you full control — the classic OSS vs commercial trade-off.
OpenAI Codex is recommended for: Parallel ticket processing and batch tasks AmpCode is recommended for: Maximum capability, variable billing
For a full overview of all 15 agents, see the Complete Guide to AI Coding Agents.