OpenAI Codex CLI vs opencode
Read from each vendor’s own pages last night, so it does not go stale the way a written comparison does.
CLI agent
OpenAI Codex CLI
OpenAI's open-source terminal coding agent, distributed through ChatGPT subscriptions.
Not read
CLI agent
opencode
Provider-agnostic open-source terminal agent. The largest OSS star count in the ecosystem.
Free
Measured — counted from real repositories, nightlyAsserted — read from the vendor docs, dated
| Compared on | OpenAI Codex CLI | opencode |
|---|---|---|
| Asserted — what each vendor publishes about itself | ||
| Category | CLI agent | CLI agent |
| Vendor | OpenAI | SST |
| Status | Active | Active |
| How it charges | Subscription | Free |
| Entry price | Not read | Free |
| Plans | No named tier on OpenAI's pricing page could be read with a price beside it. | No named tier on SST's pricing page could be read with a price beside it. |
| Default model | openai/gpt-5.5 | None — you choose |
| Your own key | Yes | Yes |
| Source | Open source · Apache-2.0 | Open source · MIT |
| Measured — counted on the last nightly run | ||
| Stars | 103.5K | 192.6K |
| Maintenance | 100/100 | 100/100 |
| Days since last push | 0 | 0 |
| Top model in it | OpenAI: GPT-5.5 · $11.25 | not measured |
| Its volume | 54B tokens | not measured |
What has changed on either of them
0 entriesNeither has moved
No price change, no tier added or withdrawn, no change of ownership on either of them since tracking began.
