Claude Code vs Codex
Someone typing this already pays for an AI subscription and is deciding which agentic coding CLI to run: the one built into Claude's ecosystem or the one built into ChatGPT's.
The difference that matters
Claude Code has no free tier at all, it requires Claude Pro at $20/mo ($17/mo billed annually), and shares its 5-hour rolling plus weekly usage pool with Claude.ai chat, aimed at serious development work on real codebases rather than simple autocomplete. Codex is included with ChatGPT Plus or Pro starting at $20/mo, the practical entry point for full cloud task delegation, with a limited free tier available on the ChatGPT Free plan ($0) that lacks cloud task delegation, aimed at handing off a well-scoped task and walking away rather than exploratory, steer-every-few-minutes work.
Side by side
| Claude Code | Codex | |
|---|---|---|
| Free tier | None: the free Claude.ai plan does not include Claude Code, only a small one-time API credit on a new Console account | Limited access on the ChatGPT Free tier ($0), no cloud task delegation |
| Entry paid plan | $20/mo (Claude Pro, $17/mo billed annually), shares a 5-hour rolling + weekly usage pool with Claude.ai chat | $20/mo (ChatGPT Plus), the practical entry point for full Codex with cloud task delegation |
| Bills in | subscription with soft usage caps; optional per-token overage or a fully separate pay-as-you-go API path | Token-based credit system (input/cached-input/output tokens) as of April 2026, replacing the old per-task model |
Choose Claude Code if
You're already invested in Claude for serious, real-codebase development work and don't mind that there's no free tier at all.
Choose Codex if
You're already on ChatGPT Plus/Pro and want to hand off well-scoped coding tasks and walk away, with at least a limited free option to try first.
Our verdict
Both cost the same $20/mo entry point through their respective chat subscriptions. Claude Code wins for deep, real-codebase development work; Codex wins for well-scoped task delegation and has an actual (if limited) free tier to test with first.
What to watch out for
Claude Code's requirement of Claude Pro ($20/mo, $17/mo billed annually) with no standalone free tier is confirmed. Codex's inclusion in ChatGPT Plus/Pro ($20/mo) as the practical entry point for cloud task delegation, plus limited free access on ChatGPT Free, is confirmed.
Compare against the rest
Both of these sit in the full Coding & Dev directory, which covers 7 tools.
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