Comparison · under IB-CODE-2026.2
OpenAI Codex CLI vs OpenCode
| OpenAI Codex CLI | OpenCode | |
|---|---|---|
| Vendor | OpenAI | opencode.ai (OSS community) |
| Pricing | Included in ChatGPT Pro $200/mo; or raw API at GPT-5.5 rates | Free OSS + API tokens (BYOK); works with Ollama for local/zero-cost runs |
| Default model | GPT-5.5 (GPT-5.5-mini available for cost-sensitive runs) | Configurable — community default claude-sonnet-4-6 or gemini-2.5-pro |
| CLI surface | ✓ | ✓ |
| Eval status | queued | in progress |
Comparison pending — neither side evaluated yet
Both OpenAI Codex CLI and OpenCode are currently unevaluated under IB-CODE-2026.2. This page will update as evaluations land.
Want this comparison sooner? Vendors can commission an evaluation to bump their tool up the queue (with full editorial independence on the verdict). Readers can email hello@indiebench.dev to vote for which comparison ships next.
About each tool
OpenAI Codex CLI
The Codex name has a long history — the original 2021 Codex API (code-davinci-002) was deprecated in March 2023. The current Codex CLI is a complete re-architecture: GPT-5.5 backed, with Goal Mode for multi-hour autonomous runs, native subagents, MCP server support, plugin marketplace, browser verif…
OpenCode
OpenCode is the 2026 open-source breakout in agentic coding CLIs. Launched March 2025, crossed Cline and OpenHands in GitHub stars by April 2026 (140K+), closing the gap on Aider. Go-based TUI with built-in plan mode, MCP support, and provider-agnostic backends (75+ providers including local Ollama)…