Claude Code vs OpenAI Codex

Claude Code and OpenAI Codex are both AI Coding tools (Coding Agents). Below: what each costs, what it does well, its biggest catches, and who should pick which, all from public sources rather than our own testing.

Side by side

Claude CodeOpenAI Codex
CategoryAI Coding Assistants · Development ToolsAI Programming · Smart Programming
PricingFree tier: no. Included in Claude Pro ($17/mo annual, $20 monthly). Max $100 or $200/mo. (checked Oct 10, 2026)Included with ChatGPT Free/Go (limited), Plus $20/mo, Pro for higher limits. (checked Oct 11, 2026)
Pros
  • Agentic coding from your terminal: edits files, runs commands, finishes tasks
  • Included with Claude Pro, so there's no separate subscription to start
  • Max plans add more usage plus $100–$200/mo in API credits
  • Included with ChatGPT plans, Free and Go included
  • Runs coding tasks in the cloud, CLI and IDE
  • Pro tier removes the five-hour limit (weekly limits can still apply)
Catches
  • Weekly limits can drain in a few sessions on Pro, per GitHub issues
  • A user-filed bug reports limits draining ~3.6x faster after the Sept 25 reset (unconfirmed by Anthropic)
  • Real daily use tends to push you to $100+/mo Max
  • Usage pool is shared with other ChatGPT agent features, so it can drain fast
  • Users report five-hour and weekly limits running out in hours on heavier models
  • Metering depends on model, context and reasoning, so it's hard to predict
Best forDevelopers comfortable in the terminal who want an agent doing real work.ChatGPT subscribers who want an included coding agent.
Skip it ifYou want unlimited coding for $20.You need predictable, published usage caps.

Which should you pick?

Pick Claude Code if…

you fit this: developers comfortable in the terminal who want an agent doing real work.

But not if: you want unlimited coding for $20.

Watch out for: Weekly limits can drain in a few sessions on Pro, per GitHub issues.

Pick OpenAI Codex if…

you fit this: chatGPT subscribers who want an included coding agent.

But not if: you need predictable, published usage caps.

Watch out for: Usage pool is shared with other ChatGPT agent features, so it can drain fast.

More options

Sources

Claude Code

OpenAI Codex

Pros, catches and prices are compiled from public sources (official pricing and docs pages, published reviews, user reports), not hands-on testing. Prices change often, so check the vendor page before you buy.