Independent register of AI agents & harnesses · no sponsored placementsEdition 2026-09 · 107 entries · evidence to 26 Sept 2026

Compare / GitHub Copilot vs Codex (CLI and app)

GitHub Copilot vs Codex (CLI and app)

GitHub Copilot rates 72 against Codex (CLI and app)'s 71 in this edition. The table lines up every dimension we record; the leading value in each numeric row is marked. Add a third or fourth entry.

Dimension
GitHub CopilotGitHub (Microsoft)
Codex (CLI and app)OpenAI
Rating
AgentsWisdom score7271
Confidencehighhigh
Rank in categoryNo. 4 of 16No. 5 of 16
Pillars
Adoption & momentum10092
Experts (independent reviews)6555
Crowd (community sample)4367
Community posts sampled2115
Experts vs crowdCrowd cooler by 22Crowd warmer by 12
Adoption
GitHub starsn/e127k
npm weekly downloadsn/e19M
PyPI monthly downloadsn/en/e
VS Code installs78M15M
Reported users50M5M
Reported customer organisationsn/en/e
Releases, last 90 days10035
Benchmarks (shown, not scored)
Terminal-Bench 2.0not listedNo. 4 of 43 · 82.25%
Codex CLI + GPT-5.5
SWE-benchnot listednot listed
Independent reviews78
Trust & safety
Overall gradeBB
Permission modelBA
Data access scopeAA
Data storagen/eB
Data retention & trainingCC
Incident historyn/eC
ComplianceAA
TransparencyBA
Price
PriceFree, paid from $10Free, paid from $8
Plans
  • Free: Free
  • Pro: $10 / monthly
  • Pro+: $39 / monthly
  • Max: $100 / monthly
  • Business: $19 / monthly per user
  • Enterprise: $39 / monthly per user
  • Free: Free
  • Go: $8 / monthly
  • Plus: $20 / monthly
  • Pro: $100 / monthly
  • Business: $20 / monthly
  • Enterprise & Edu: Custom
  • API key: Custom
Product
CategoryCoding agentsCoding agents
MakerGitHub (Microsoft)OpenAI
LicenceproprietaryApache-2.0
Use it viaIDE extension, CLI, Desktop app, Web app, Mobile app, Chat apps, APICLI, Desktop app, IDE extension, Web app, API
Runs onmacos, windows, linux, webmacos, linux, windows, web
Models it drivesGPT, Claude, Gemini, Grok, Kimi (open-weight), automatic model routingGPT
Key features
  • Agent mode in VS Code, Visual Studio and JetBrains with an Agents window and local Dev Container execution
  • Copilot cloud agent: assign an issue, agent works in an ephemeral GitHub Actions environment and opens one pull request per task
  • Copilot CLI terminal agent (npm @github/copilot) with experimental semantic model routing
  • Copilot code review and Autofix on pull requests
  • Copilot app with Jira, Sentry, Slack and Microsoft Teams integrations
  • Assisted approvals and local sandboxing for agent sessions (public preview, Sept 2026)
  • Third-party coding agents (Claude, OpenAI) available on Pro+ and above
  • Token-based GitHub AI Credits billing since June 2026
  • Open-source Rust CLI (Apache-2.0) installable via npm, Homebrew or standalone installers
  • Desktop app with in-app diff review and inline comments
  • IDE extension for VS Code, Cursor and Windsurf
  • OS-level sandbox on by default locally, with configurable approval policy and network off by default
  • Optional auto-review mode that routes approval requests through a reviewer agent
  • Cloud tasks that run in OpenAI-hosted environments
Verdicts
Praised for
  • Broad model choice under one enterprise contract, including open-weight models, is cited as its enterprise advantage (HN, July 2026).
  • Reach and distribution: 50 million users and deep GitHub integration (Microsoft FY26 Q4 call; GitHub discussion users citing GHE integration).
  • Independent reviewers find it pays off for high-volume, well-tested code in mainstream languages (Netguru, Sept 2026).
  • Generous usage within ChatGPT subscriptions compared with rivals, per many community comments (HN)
  • Strong Terminal-Bench 2.0 result: rank 4 of 43 harnesses
  • Safe-by-default local sandbox and approval model (docs)
  • Delegation and review workflow in the app praised by reviewers (Every; Composio)
Criticised for
  • June 2026 move to usage-based AI Credits was widely read as a large effective price increase; many users said they would cancel (HN and GitHub Community, April 2026).
  • Trust damage from Copilot inserting promotional 'tips' into pull requests in March 2026, later withdrawn.
  • Individual-plan interaction data used for model training by default since 24 April 2026 unless users opt out.
  • Real-world suggestion acceptance reported well below GitHub's published figures (Netguru, Sept 2026).
  • Usage-limit and rate-limit changes cause sharp complaints (GitHub issue #28879 with 364 upvotes)
  • Reported bugs with serious side effects, e.g. $HOME deletion in full-access mode (Simon Willison, July 2026) and excessive SSD writes from logs
  • Weak front-end/UI output reported by some users (r/codex)
Evidence
Evidence collected26 Sept 202626 Sept 2026
Sources cited53