Kiro CLI vs OpenAI Codex CLI — Feature Comparison
Quick answer: Kiro CLI supports 12 of 18 tracked features; OpenAI Codex CLI supports 16 of 18. Matrix last updated October 9, 2026.
Kiro CLI (by Amazon Web Services) vs OpenAI Codex CLI (by OpenAI): a side-by-side comparison of tracked features, release cadence, and the latest releases of each tool. Data as of October 16, 2026, refreshed daily.
Verdict: Kiro vs Codex CLI
OpenAI Codex CLI is the stronger choice for most developers, but Kiro CLI remains a credible option for teams that prefer a more focused, stable toolset. OpenAI Codex CLI leads on tracked feature coverage — 16 of 18 versus Kiro CLI's 12 — and uniquely supports Diff View, VS Code integration, Vim/Neovim, and a Web UI, giving it a meaningful edge for developers who want flexibility across multiple editors and surfaces. Its release cadence is also notably more aggressive, with 38 releases in a 90-day window compared to Kiro CLI's 21, suggesting a faster iteration cycle and more frequent bug fixes or capability additions. That said, a higher release count is not inherently superior — teams that value predictability and lower upgrade friction may prefer Kiro CLI's comparatively measured pace, and a smaller feature surface can mean fewer rough edges or breaking changes to manage. Kiro CLI holds its own on the features it does cover, and there is no category where it supports something Codex CLI lacks, meaning adopting it is not a trade-off of capability in one direction for another — it is simply a narrower tool. The practical decision hinges on workflow: if your team works across VS Code, Neovim, or wants a web interface alongside CLI access, OpenAI Codex CLI is the clear pick. If you want a streamlined CLI-first experience with a stable release rhythm, Kiro CLI is a defensible choice that won't leave you lacking on core functionality.
Choose Kiro CLI if: Choose Kiro CLI if you prefer a CLI-first workflow with a more measured release cadence and a tighter, less complex feature surface that reduces upgrade overhead for your team.
Choose OpenAI Codex CLI if: Choose OpenAI Codex CLI if you want broader editor integration — including VS Code and Vim/Neovim — plus Diff View and Web UI support, and you value a rapidly iterating tool that keeps pace with the latest capabilities.
Key differences
- OpenAI Codex CLI supports 16/18 tracked features versus Kiro CLI's 12/18, with exclusive support for Diff View, VS Code, Vim/Neovim, and Web UI
- OpenAI Codex CLI has a significantly faster release cadence — 38 releases in the last 90 days versus Kiro CLI's 21 — indicating more rapid iteration
- OpenAI Codex CLI has a much larger total release history (170 tracked) compared to Kiro CLI (57), suggesting greater overall maturity and longer active development
- Kiro CLI covers no unique features that Codex CLI lacks, making it a subset rather than an alternative in terms of tracked capabilities
- Kiro CLI's narrower scope may appeal to teams wanting a simpler CLI tool with fewer integration surface areas to manage
At a glance
| Tool | Latest version | Release date | Releases tracked |
|---|---|---|---|
| Kiro CLI | v2.29.0 | October 16, 2026 | 60 |
| OpenAI Codex CLI | rust-v0.162.1 | October 9, 2026 | 175 |
Kiro vs Codex CLI: key feature differences
Kiro CLI supports 12 of 18 tracked features; OpenAI Codex CLI supports 16 of 18. Both support 12 features.
What Kiro has that Codex CLI doesn't
None in the tracked matrix.
What Codex CLI has that Kiro doesn't
- Diff View
- VS Code
- Vim/Neovim
- Web UI
Release cadence: Kiro vs Codex CLI
Codex CLI ships more often: 36 releases in the last 90 days versus 19 for Kiro. Counts are as of October 16, 2026.
| Metric | Kiro | Codex CLI |
|---|---|---|
| Releases in the last 30 days | 7 | 16 |
| Releases in the last 90 days | 19 | 36 |
| Median gap between recent releases | 5 days | 1 day |
| Releases tracked | 60 | 175 |
| First tracked release | November 24, 2025 | June 30, 2025 |
What's new in Kiro and Codex CLI
Latest Kiro CLI releases
- Kiro CLI v2.29.0 (October 16, 2026) — Kiro CLI 2.29.0 now remembers your work context across sessions, so you won't need to repeat repository details or commands anymore. This means faster, smarter conversations that pick up exactly…
- Kiro CLI v3.0.0 (October 5, 2026) — Kiro CLI 3.0.0 makes switching from Classic easier than ever with a built-in migration path, while V3 users get better hook organization and faster performance on longer conversations. Check out…
- Kiro CLI v2.27.0 (October 1, 2026) — {/ cspell:ignore Herdr /}
Latest OpenAI Codex CLI releases
- OpenAI Codex CLI rust-v0.162.1 (October 9, 2026) — OpenAI Codex CLI rust-v0.162.1 fixes a critical crash when handling multi-line questions and resolves startup issues caused by feature setting mismatches. These updates make the tool more reliable…
- OpenAI Codex CLI rust-v0.162.0 (October 8, 2026) — The OpenAI Codex CLI rust-v0.162.0 release makes URLs clickable throughout the interface and adds powerful new ways to organize your work, including pinnable tasks and Git worktree management for…
- OpenAI Codex CLI rust-v0.161.0 (October 7, 2026) — OpenAI Codex CLI rust-v0.161.0 now defaults to the faster GPT-6.1 Sol model and lets you customize your microphone and speaker settings for voice conversations. You can also log into MCP servers…
Core Editing
Multi-file editing, streaming, undo capabilities
| Feature | Kiro | Codex CLI |
|---|---|---|
| Multi-file Editing — Edit multiple files in a single operation | — | — |
| Streaming Output — Real-time streaming of AI responses | ✓ since 2.24.0 | ✓ since rust-v0.162.0 |
| Undo/Redo — Ability to undo and redo changes | ✓ since 2.20.0 | ✓ since rust-v0.162.0 |
| Diff View — Visual comparison of changes | — | ✓ since rust-v0.162.0 |
Terminal Integration
Shell and command execution support
| Feature | Kiro | Codex CLI |
|---|---|---|
| Command Execution — Run shell commands | ✓ since 2.29.0 | ✓ since rust-v0.162.0 |
| Shell Integration — Integration with user shell environment | ✓ (v2.26.0 mentions 'new terminal interface'; v2.24.0 mentions 'control over environment variables in your workflows'; term) | ✓ since rust-v0.159.0 |
| Background Tasks — Run tasks in background | ✓ (v2.26.0 mentions 'reusable task workflows'; v2.25.0 mentions 'SessionEnd Hook for advanced automation' suggesting backgr) | ✓ since rust-v0.162.0 |
MCP Support
Model Context Protocol server and client capabilities
| Feature | Kiro | Codex CLI |
|---|---|---|
| MCP Client — Connect to MCP servers | ✓ since 2.26.0 | ✓ since rust-v0.162.0 |
| MCP Server — Expose as MCP server | ✓ since 2.24.0 | ✓ since rust-v0.162.0 |
| Custom Tools — Define and use custom tools | ✓ (v2.25.0 mentions managing 'Powers' from local sessions and customizing responses; hooks system (SessionEnd Hook) suggest) | ✓ since rust-v0.162.0 |
IDE Integrations
VS Code, JetBrains, and other editor support
| Feature | Kiro | Codex CLI |
|---|---|---|
| VS Code — Visual Studio Code integration | — | ✓ since rust-v0.136.0 |
| JetBrains — IntelliJ/WebStorm integration | — | — |
| Vim/Neovim — Vim or Neovim integration | — | ✓ since rust-v0.162.0 |
| Web UI — Browser-based interface | — | ✓ since rust-v0.162.0 |
Agentic Features
Planning, tool use, and autonomous capabilities
| Feature | Kiro | Codex CLI |
|---|---|---|
| Planning Mode — Plan before executing changes | ✓ since 2.15.0 | ✓ since rust-v0.160.0 |
| Autonomous Mode — Extended autonomous operation | ✓ since 2.25.0 | ✓ since rust-v0.162.0 |
| Task Decomposition — Break complex tasks into steps | ✓ since 2.26.0 | ✓ since rust-v0.162.0 |
| Context Management — Manage context across conversations | ✓ since 2.29.0 | ✓ since rust-v0.162.0 |
Feature timeline: who shipped first
First release where Kiro and Codex CLI each shipped a notable feature, and which tool led.
| Feature | Kiro | Codex CLI | Who led |
|---|---|---|---|
| Custom Slash Commands | June 12, 2026 | August 20, 2025 | Codex CLI first, 297d ahead |
| Subagents / Parallel Agents | December 18, 2025 | January 25, 2026 | Kiro first, 38d ahead |
| Sandboxing / Permission Modes | August 11, 2026 | August 7, 2025 | Codex CLI first, 369d ahead |
| Background Tasks | August 11, 2026 | September 9, 2026 | Kiro first, 29d ahead |
| Hooks | July 17, 2026 | May 8, 2026 | Codex CLI first, 69d ahead |
| Skills / Plugins | — | December 10, 2025 | only Codex CLI |
| Project Memory Files | August 12, 2026 | February 12, 2026 | Codex CLI first, 181d ahead |
| MCP Support | December 18, 2025 | July 23, 2025 | Codex CLI first, 148d ahead |
| Extended Thinking | June 5, 2026 | July 9, 2025 | Codex CLI first, 331d ahead |
| Voice Input | August 12, 2026 | February 25, 2026 | Codex CLI first, 168d ahead |
| Planning Mode | December 18, 2025 | January 25, 2026 | Kiro first, 38d ahead |
| Image / Vision Input | — | December 2, 2025 | only Codex CLI |
| Headless / Non-interactive Mode | — | July 19, 2025 | only Codex CLI |
| Web Search / Fetch | — | June 9, 2026 | only Codex CLI |
| Git / PR Integration | — | May 7, 2026 | only Codex CLI |
| Checkpoints / Rewind | June 12, 2026 | December 15, 2025 | Codex CLI first, 179d ahead |
| Todo / Task List | — | May 21, 2026 | only Codex CLI |
Frequently asked questions
Which is better, Kiro CLI or OpenAI Codex CLI?
OpenAI Codex CLI is the stronger choice for most developers, but Kiro CLI remains a credible option for teams that prefer a more focused, stable toolset. OpenAI Codex CLI leads on tracked feature coverage — 16 of 18 versus Kiro CLI's 12 — and uniquely supports Diff View, VS Code integration, Vim/Neovim, and a Web UI, giving it a meaningful edge for developers who want flexibility across multiple editors and surfaces. Its release cadence is also notably more aggressive, with 38 releases in a 90-day window compared to Kiro CLI's 21, suggesting a faster iteration cycle and more frequent bug fixes or capability additions. That said, a higher release count is not inherently superior — teams that value predictability and lower upgrade friction may prefer Kiro CLI's comparatively measured pace, and a smaller feature surface can mean fewer rough edges or breaking changes to manage. Kiro CLI holds its own on the features it does cover, and there is no category where it supports something Codex CLI lacks, meaning adopting it is not a trade-off of capability in one direction for another — it is simply a narrower tool. The practical decision hinges on workflow: if your team works across VS Code, Neovim, or wants a web interface alongside CLI access, OpenAI Codex CLI is the clear pick. If you want a streamlined CLI-first experience with a stable release rhythm, Kiro CLI is a defensible choice that won't leave you lacking on core functionality.
What is the difference between Kiro and Codex CLI?
Kiro CLI supports 12 of 18 tracked features; OpenAI Codex CLI supports 16 of 18. Only Codex CLI: Diff View, VS Code, Vim/Neovim, and Web UI. Both support 12 tracked features.
Which gets updated more often, Kiro or Codex CLI?
OpenAI Codex CLI ships more often. In the 90 days to October 16, 2026, Havoptic tracked 19 Kiro releases and 36 Codex CLI releases (60 and 175 releases tracked in total). Kiro's median gap between its last 21 releases is 5 days. Codex CLI's median gap between its last 21 releases is 1 day.
What are the latest versions of Kiro and Codex CLI?
The latest Kiro CLI release is v2.29.0, released October 16, 2026. The latest OpenAI Codex CLI release is rust-v0.162.1, released October 9, 2026.
Do Kiro and Codex CLI support MCP (Model Context Protocol)?
Kiro CLI supports MCP Client, MCP Server, and Custom Tools. OpenAI Codex CLI supports MCP Client, MCP Server, and Custom Tools.
Release velocity
Havoptic tracks 60 Kiro releases and 175 Codex CLI releases. See release frequency charts for side-by-side velocity analysis, or browse the Kiro CLI changelog and OpenAI Codex CLI changelog.
Related comparisons
More Kiro CLI comparisons
- Kiro CLI vs Claude Code
- Kiro CLI vs Cursor
- Kiro CLI vs Gemini CLI
- Kiro CLI vs GitHub Copilot CLI
- Kiro CLI vs Devin Desktop
- Kiro CLI vs Antigravity CLI
- Kiro CLI vs Grok Build
More OpenAI Codex CLI comparisons
- OpenAI Codex CLI vs Claude Code
- OpenAI Codex CLI vs Cursor
- OpenAI Codex CLI vs Gemini CLI
- OpenAI Codex CLI vs GitHub Copilot CLI
- OpenAI Codex CLI vs Devin Desktop
- OpenAI Codex CLI vs Antigravity CLI
- OpenAI Codex CLI vs Grok Build
Data source
Feature data is maintained in feature-matrix.json under a CC-BY-4.0 license. Release data comes from releases.json. Both are updated daily. See the methodology page for details on sourcing and human review.