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Claude Code vs Codex. Rows marked Differs have different values.

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Claude Code

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Codex

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TypeOpen sourceOpen source
Categories
In one lineAnthropic's agentic coding tool for the terminal, IDE and GitHub.OpenAI's terminal coding agent.
Stage & funding——
GitHub starsDiffers≈154k≈131k
LicenseDiffersProprietary (Anthropic Commercial Terms)Apache-2.0
LanguageDiffersTypeScriptRust
Last pushDiffers—Oct 28, 2026
Works with——
Built on——
Built on itDiffers
Similar toDiffers—
People linkedDiffers32
EventsDiffers
Pros
  • User reportsUsers widely see it as the strongest overall agent with Opus-class models, and strong with skills, hooks and LSPs.[1][2]
  • User reportsRich built-in harness features (subagents, skills, hooks, plugins, headless mode) that other tools can call into.[1][2]
  • User reportsUsers report the flat Max subscription covers far more usage than the same work would cost at API prices.[1][2]
  • MetadataVery fast release cadence (v2.1.312 on Oct 27, 2026).[1]
  • DocsApache-2.0 open-source CLI that sandboxes by default (workspace-write, using Seatbelt on macOS, bubblewrap on Linux and a native Windows sandbox).[1][2]
  • DocsIncluded in every ChatGPT plan from Free to Enterprise, and Pro currently has no five-hour limit (weekly limits may still apply).[1]
  • User reportsUsers who switched from Claude report comparable coding quality, better value and faster responses on Plus.[1][2]
  • MetadataVery fast release cadence (rust-v0.165.0 on Oct 27, 2026; about 132k stars).[1]
Cons
  • User reportsUsage caps and quota changes are a recurring complaint, and people fall back to Codex or OpenCode.[1][2]
  • User reportsUsers measure heavy base context: about 33k tokens before your prompt vs about 7k for OpenCode.[1][2]
  • MetadataSubscriptions can't be used in third-party harnesses, and the CLI has no OSI open-source license; use falls under Anthropic's commercial terms.[1][2]
  • MetadataAbout 16k open GitHub issues and PRs, plus trust worries after the March 2026 source leak.[1][2]
  • User reportsUsage limits are opaque and shifting; some users hit the five-hour cap on the $20 plan during a basic task.[1][2]
  • User reportsHeavy default context: a Pi user says Codex loads close to 20k tokens of "cruft" before your first message.[1]
  • MetadataAbout 25k open GitHub issues and PRs, and critics point to a bloated Rust dependency tree (109 duplicate transitive deps; 75-minute release builds on a laptop).[1][2][3]
  • User reportsUsers report quality and usage swings after model launches.[1][2]
Best forDevelopers who want the most capable out-of-the-box coding agent with Claude models and a deep extension surface.ChatGPT subscribers who want an open-source, sandboxed-by-default coding agent bundled with their plan.
Watch out forYou are locked to Anthropic's quotas and terms; plan for usage caps and measure the context overhead.Plan for opaque, changing usage quotas, and trim the default context if token efficiency matters.
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