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

Compare / OpenCode vs Codex (CLI and app)

OpenCode vs Codex (CLI and app)

OpenCode rates 75 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
OpenCodeAnomaly
Codex (CLI and app)OpenAI
Rating
AgentsWisdom score7571
Confidencehighhigh
Rank in categoryNo. 1 of 16No. 5 of 16
Pillars
Adoption & momentum9592
Experts (independent reviews)7155
Crowd (community sample)5367
Community posts sampled2315
Experts vs crowdCrowd cooler by 17Crowd warmer by 12
Adoption
GitHub stars210k127k
npm weekly downloads2.2M19M
PyPI monthly downloadsn/en/e
VS Code installsn/e15M
Reported users16M5M
Reported customer organisationsn/en/e
Releases, last 90 days4235
Benchmarks (shown, not scored)
Terminal-Bench 2.0No. 36 of 43 · 51.69%
OpenCode + Claude Opus 4.5
No. 4 of 43 · 82.25%
Codex CLI + GPT-5.5
SWE-benchnot listednot listed
Independent reviews98
Trust & safety
Overall gradeBB
Permission modelCA
Data access scopeAA
Data storageAB
Data retention & trainingn/eC
Incident historyCC
ComplianceDA
TransparencyAA
Price
PriceFree, paid from $10Free, paid from $8
Plans
  • Free (BYOK): Free
  • OpenCode Go: $10 / monthly
  • OpenCode Zen: Custom
  • Enterprise: Custom
  • Free: Free
  • Go: $8 / monthly
  • Plus: $20 / monthly
  • Pro: $100 / monthly
  • Business: $20 / monthly
  • Enterprise & Edu: Custom
  • API key: Custom
Product
CategoryCoding agentsCoding agents
MakerAnomalyOpenAI
LicenceMITApache-2.0
Use it viaCLI, Desktop app, IDE extension, Web appCLI, Desktop app, IDE extension, Web app, API
Runs onmacos, linux, windowsmacos, linux, windows, web
Models it drivesClaude, GPT, Gemini, Kimi, DeepSeek, GLM, Qwen, local models, any OpenAI-compatibleGPT
Key features
  • Terminal UI, desktop app and IDE extension
  • Bring-your-own-key across many providers plus local models
  • Plan and Build agent modes
  • LSP integration
  • Configurable allow/ask/deny permissions per tool, with external_directory scoping
  • Optional session sharing via /share
  • Optional paid model access via OpenCode Zen and OpenCode Go
  • 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
  • Model freedom: one config change to switch provider or run locally (Composio, heyuan110)
  • Low-cost access through the $10 Go plan (Thomas Wiegold; multiple HN users)
  • Works reasonably well across many models out of the box (HN)
  • 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
  • Fast release cadence brings regressions (AICoderScope)
  • High memory/CPU use reported (GitHub Memory Megathread; HN)
  • Repeated serious security advisories in 2026, including unauthenticated command execution
  • Security track record judged weaker than Claude Code (heyuan110)
  • 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 cited83