Kiro CLI vs OpenAI Codex CLI — Feature Comparison
Quick answer: Kiro CLI supports 17 of 18 tracked features; OpenAI Codex CLI supports 17 of 18. Matrix last updated November 13, 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 November 14, 2026, refreshed daily.
Verdict: Kiro vs Codex CLI
Neither tool is universally better — the right choice depends almost entirely on your editor ecosystem and how much release cadence matters to your workflow. Both Kiro CLI and OpenAI Codex CLI match on tracked feature support (17/18), so raw capability is essentially a tie. Where they diverge is in release velocity and the one feature each uniquely covers: Kiro CLI supports JetBrains IDEs while OpenAI Codex CLI supports Vim/Neovim. OpenAI Codex CLI has a significantly higher total release count and a faster recent cadence, suggesting a more active iteration loop and potentially quicker bug fixes or experimental features reaching users sooner. Kiro CLI, while releasing at a healthy pace, moves more conservatively — which some teams may actually prefer for stability in CI or shared developer environments. If your engineering org is standardized on IntelliJ, PyCharm, or any other JetBrains product, Kiro CLI is the practical choice since it's the only one of the two with that integration. Conversely, if your team lives in the terminal and Vim or Neovim is the daily driver, OpenAI Codex CLI is the clear fit. For teams that don't have a strong IDE preference leaning toward either JetBrains or Vim, OpenAI Codex CLI's higher release cadence gives it a slight edge as the more actively evolving option, but neither tool should be dismissed — both are mature, capable, and nearly feature-equivalent.
Choose Kiro CLI if: Choose Kiro CLI if your team is embedded in the JetBrains ecosystem (IntelliJ, PyCharm, WebStorm, etc.) and needs native IDE integration as part of the AI coding workflow.
Choose OpenAI Codex CLI if: Choose OpenAI Codex CLI if you or your team work primarily in Vim or Neovim, or if you want the faster-iterating tool with a higher overall release cadence and more frequent updates.
Key differences
- OpenAI Codex CLI has a substantially higher total release count and faster recent cadence, indicating more aggressive iteration
- Kiro CLI uniquely supports JetBrains IDEs; OpenAI Codex CLI uniquely supports Vim/Neovim
- Both tools are tied on overall tracked feature support at 17/18, making capability essentially equivalent outside editor integration
- Kiro CLI's more measured release pace may suit teams prioritizing stability in shared or automated environments
- Editor ecosystem — not feature breadth — is the decisive differentiator between these two otherwise closely matched tools
At a glance
| Tool | Latest version | Release date | Releases tracked |
|---|---|---|---|
| Kiro CLI | v3.3.0 | November 12, 2026 | 72 |
| OpenAI Codex CLI | rust-v0.169.0 | November 13, 2026 | 184 |
Kiro vs Codex CLI: key feature differences
Kiro CLI supports 17 of 18 tracked features; OpenAI Codex CLI supports 17 of 18. Both support 16 features.
What Kiro has that Codex CLI doesn't
- JetBrains
What Codex CLI has that Kiro doesn't
- Vim/Neovim
Release cadence: Kiro vs Codex CLI
Codex CLI ships more often: 40 releases in the last 90 days versus 24 for Kiro. Counts are as of November 14, 2026.
| Metric | Kiro | Codex CLI |
|---|---|---|
| Releases in the last 30 days | 10 | 9 |
| Releases in the last 90 days | 24 | 40 |
| Median gap between recent releases | 2 days | 1.2 days |
| Releases tracked | 72 | 184 |
| First tracked release | November 24, 2025 | June 30, 2025 |
What's new in Kiro and Codex CLI
Latest Kiro CLI releases
- Kiro CLI v3.3.0 (November 12, 2026) — This release adds /copy N and /copy last N, so you can copy an earlier response or the last few messages, and lets you choose the context usage at which automatic compaction starts. It also shows e...
- Kiro CLI v3.2.0 (November 11, 2026) — This release brings Output details to everyone: choose in /settings how much detail tool calls show, from one line per call to the full output. It also fixes sign-in on Linux hosts with no graphica...
- Kiro CLI v3.2.1 (November 11, 2026) — Output Details and Sign-In Fixes. Learn more ->
Latest OpenAI Codex CLI releases
- OpenAI Codex CLI rust-v0.169.0 (November 13, 2026) — Codex CLI rust-v0.169.0 is here: multiple side-chat tabs, searchable past tasks, collapsible turn details, and in-terminal provider setup. Want to see what else changed?
- OpenAI Codex CLI rust-v0.168.0 (November 13, 2026) — Codex CLI rust-v0.168.0 is here: pick a default model provider, split your chat with a side-conversation pane, attach audio recordings, and generate animated GIFs. Plus a batch of fixes. Ready to…
- OpenAI Codex CLI rust-v0.167.2 (November 11, 2026) — Codex CLI rust-v0.167.2 is here: tool updates now stream incrementally by default on Google Cloud Vertex AI. Want the old behavior back? One config flag does it. Curious what else changed under the…
Core Editing
Multi-file editing, streaming, undo capabilities
| Feature | Kiro | Codex CLI |
|---|---|---|
| Multi-file Editing — Edit multiple files in a single operation | ✓ (Implied by agent harness capabilities and workflow operations across files) | ✓ (Codex CLI is a coding agent that edits files; multi-file editing is a core capability implied by the agent command cente) |
| Streaming Output — Real-time streaming of AI responses | ✓ since 2.24.0 | ✓ since rust-v0.169.0 |
| Undo/Redo — Ability to undo and redo changes | ✓ since 2.20.0 | ✓ since rust-v0.164.0 |
| Diff View — Visual comparison of changes | ✓ since 2.4.0 | ✓ since rust-v0.169.0 |
Terminal Integration
Shell and command execution support
| Feature | Kiro | Codex CLI |
|---|---|---|
| Command Execution — Run shell commands | ✓ since 2.37.0 | ✓ since rust-v0.169.0 |
| Shell Integration — Integration with user shell environment | ✓ (v2.35.0 mentions jumping back to prompt from long outputs; terminal authentication and Linux sign-in fixes in v3.2.0) | ✓ since rust-v0.164.0 |
| Background Tasks — Run tasks in background | ✓ since 2.0.0 | ✓ since rust-v0.169.0 |
MCP Support
Model Context Protocol server and client capabilities
| Feature | Kiro | Codex CLI |
|---|---|---|
| MCP Client — Connect to MCP servers | ✓ since 2.35.0 | ✓ since rust-v0.169.0 |
| MCP Server — Expose as MCP server | ✓ since 2.35.0 | ✓ since rust-v0.169.0 |
| Custom Tools — Define and use custom tools | ✓ (v2.33.0 mentions hooks, agents, MCP servers, steering, workflows as custom workspace configurations) | ✓ since rust-v0.169.0 |
IDE Integrations
VS Code, JetBrains, and other editor support
| Feature | Kiro | Codex CLI |
|---|---|---|
| VS Code — Visual Studio Code integration | ✓ since 1.24.0 | ✓ since rust-v0.136.0 |
| JetBrains — IntelliJ/WebStorm integration | ✓ since 1.25.0 | — |
| Vim/Neovim — Vim or Neovim integration | — | ✓ since rust-v0.166.0 |
| Web UI — Browser-based interface | ✓ since 2.35.0 | ✓ since rust-v0.169.0 |
Agentic Features
Planning, tool use, and autonomous capabilities
| Feature | Kiro | Codex CLI |
|---|---|---|
| Planning Mode — Plan before executing changes | ✓ since 2.32.0 | ✓ since rust-v0.169.0 |
| Autonomous Mode — Extended autonomous operation | ✓ since 3.3.0 | ✓ since rust-v0.169.0 |
| Task Decomposition — Break complex tasks into steps | ✓ since 3.3.0 | ✓ since rust-v0.169.0 |
| Context Management — Manage context across conversations | ✓ since 3.3.0 | ✓ since rust-v0.169.0 |
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 |
|---|---|---|---|
| Skills / Plugins | — | December 10, 2025 | only Codex CLI |
| Sandboxing / Permission Modes | August 11, 2026 | August 7, 2025 | Codex CLI first, 369d ahead |
| Subagents / Parallel Agents | December 18, 2025 | January 25, 2026 | Kiro first, 38d ahead |
| Background Tasks | August 11, 2026 | September 9, 2026 | Kiro first, 29d ahead |
| Extended Thinking | June 5, 2026 | July 9, 2025 | Codex CLI first, 331d ahead |
| Hooks | July 17, 2026 | May 8, 2026 | Codex CLI first, 69d ahead |
| Image / Vision Input | — | December 2, 2025 | only Codex CLI |
| MCP Support | December 18, 2025 | July 23, 2025 | Codex CLI first, 148d ahead |
| Voice Input | August 12, 2026 | February 25, 2026 | Codex CLI first, 168d ahead |
| Web Search / Fetch | — | June 9, 2026 | only Codex CLI |
| Headless / Non-interactive Mode | October 15, 2026 | July 19, 2025 | Codex CLI first, 453d ahead |
| Checkpoints / Rewind | June 12, 2026 | December 15, 2025 | Codex CLI first, 179d ahead |
| Custom Slash Commands | June 12, 2026 | August 20, 2025 | Codex CLI first, 297d ahead |
| Project Memory Files | August 12, 2026 | February 12, 2026 | Codex CLI first, 181d ahead |
| Git / PR Integration | — | May 7, 2026 | only Codex CLI |
| Planning Mode | December 18, 2025 | January 25, 2026 | Kiro first, 38d ahead |
| Todo / Task List | — | May 21, 2026 | only Codex CLI |
Frequently asked questions
Which is better, Kiro CLI or OpenAI Codex CLI?
Neither tool is universally better — the right choice depends almost entirely on your editor ecosystem and how much release cadence matters to your workflow. Both Kiro CLI and OpenAI Codex CLI match on tracked feature support (17/18), so raw capability is essentially a tie. Where they diverge is in release velocity and the one feature each uniquely covers: Kiro CLI supports JetBrains IDEs while OpenAI Codex CLI supports Vim/Neovim. OpenAI Codex CLI has a significantly higher total release count and a faster recent cadence, suggesting a more active iteration loop and potentially quicker bug fixes or experimental features reaching users sooner. Kiro CLI, while releasing at a healthy pace, moves more conservatively — which some teams may actually prefer for stability in CI or shared developer environments. If your engineering org is standardized on IntelliJ, PyCharm, or any other JetBrains product, Kiro CLI is the practical choice since it's the only one of the two with that integration. Conversely, if your team lives in the terminal and Vim or Neovim is the daily driver, OpenAI Codex CLI is the clear fit. For teams that don't have a strong IDE preference leaning toward either JetBrains or Vim, OpenAI Codex CLI's higher release cadence gives it a slight edge as the more actively evolving option, but neither tool should be dismissed — both are mature, capable, and nearly feature-equivalent.
What is the difference between Kiro and Codex CLI?
Kiro CLI supports 17 of 18 tracked features; OpenAI Codex CLI supports 17 of 18. Only Kiro: JetBrains. Only Codex CLI: Vim/Neovim. Both support 16 tracked features.
Which gets updated more often, Kiro or Codex CLI?
OpenAI Codex CLI ships more often. In the 90 days to November 14, 2026, Havoptic tracked 24 Kiro releases and 40 Codex CLI releases (72 and 184 releases tracked in total). Kiro's median gap between its last 21 releases is 2 days. Codex CLI's median gap between its last 21 releases is 1.2 days.
What are the latest versions of Kiro and Codex CLI?
The latest Kiro CLI release is v3.3.0, released November 12, 2026. The latest OpenAI Codex CLI release is rust-v0.169.0, released November 13, 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 72 Kiro releases and 184 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.