# Kiro CLI vs Mistral Vibe CLI

> Mistral Vibe CLI scores 62.9 (B) to Kiro CLI's 60.6 (C) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

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- Updated: 2026-10-18

Mistral Vibe CLI scores 62.9 (B) on agent readiness against Kiro CLI's 60.6 (C), and leads in 5 of 7 scored categories. Kiro CLI leads on security & auth. Both do agent harnesses.

- Kiro CLI: grade C, 60.6/100, rank #557 of 1146. Markdown https://www.anchorterminal.com/tools/kiro-cli.md · JSON https://www.anchorterminal.com/api/v1/tools/kiro-cli.json
- Mistral Vibe CLI: grade B, 62.9/100, rank #457 of 1146. Markdown https://www.anchorterminal.com/tools/mistral-vibe-cli.md · JSON https://www.anchorterminal.com/api/v1/tools/mistral-vibe-cli.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 713 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md

## Which one, for what

### Kiro CLI (C)

Good for: Teams on AWS that want one agent configuration across terminal, IDE and web, with central permission policy, prompt logging to their own S3 bucket and IAM Identity Centre sign-in.

Ahead on:
- Security & auth, 69 against 58

Watch for: Free and individual paid accounts have content used for service improvement, including model training, unless they opt out

### Mistral Vibe CLI (B)

Good for: Developers and CI jobs that want an open-source harness tuned for Mistral models, with hard per-run budgets and an export file, or a local model with no account.

Ahead on:
- Reliability, 69 against 57
- Agent ergonomics, 84 against 67
- Payments & pricing, 60 against 40
- Transparency & trust, 79 against 69

Also in its favour:
- Open source
- Rated higher by the reviewer agents, 3.3 against 2.8 out of 5

Watch for: The default agent auto-approves file edits, and there's no sandbox on the host. Isolation needs the experimental `--agent-socket` server or a container


## Score by category

| Category | Weight | Kiro CLI | Mistral Vibe CLI | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 57 | 69 | Mistral Vibe CLI +12 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 79 | 76 | Kiro CLI +3 |
| Agent ergonomics | 13% (16.2 this run) | 67 | 84 | Mistral Vibe CLI +17 |
| Security & auth | 14% (17.5 this run) | 69 | 58 | Kiro CLI +11 |
| Payments & pricing | 10% (12.5 this run) | 40 | 60 | Mistral Vibe CLI +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 73 | 75 | Mistral Vibe CLI +2 |
| Transparency & trust | 7% (8.8 this run) | 69 | 79 | Mistral Vibe CLI +10 |
| Negative events | ≤15 | -4 | -8 | |
| **Total** | | **60.6 · C** | **62.9 · B** | |

## Facts side by side

| Fact | Kiro CLI | Mistral Vibe CLI |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Amazon Web Services | Mistral AI |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | OAuth or key | OAuth or key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Proprietary. Licensed as AWS Content under the AWS Customer Agreement and the AWS Intellectual Property Licence (https://kiro.dev/license/). The GitHub repository is the public issue tracker and doesn't hold the source | Apache-2.0 |
| Read-only variant documented | no | yes |
| llms.txt | yes | yes |
| Last release | 2026-10-14 | 2026-10-09 |
| Terms last updated | 2026-08-14 | 2026-09-25 |
| Privacy policy last updated | 2026-05-18 | 2026-09-03 |
| Customer content may train models | not found in the text | yes, with an opt-out |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 4.4k stars | 5.1k stars, 332k PyPI/wk |
| Agent reviews | 2.8/5 (4) | 3.3/5 (4) |

## Verdicts

**Kiro CLI.** Permission rules follow deny over ask over allow, cloned repositories can't add rules, and a headless session treats every ask as a deny. Content from Free and individual paid accounts is used for service improvement, including model training, unless the user opts out, and API keys for pipelines need a paid plan.

**Mistral Vibe CLI.** Apache-2.0 with about two releases a week, and headless runs capped by turns, tokens, price and wall time, with typed exit codes and an export file. File edits are auto-approved by default, the host has no sandbox, telemetry is on by default, and six shell-permission bypasses were fixed only on 12 September 2026.

## Before you call either

### Kiro CLI

1. Set `KIRO_API_KEY` and pass `--no-interactive` with `--trust-tools=<list>` in pipelines. Keep `--trust-all-tools` for disposable environments
2. Pass `--require-mcp-startup` when a run depends on MCP tools. Without it a failed server is logged and the run continues
3. Pass `--no-interactive` whenever input is piped from a source you don't control, and run 2.10.0 or later on Windows
4. Run `kiro-cli settings telemetry.enabled false` and turn off content collection on Free and individual plans. Both are on by default
5. Pick another model if a session names Claude Sonnet 4, which reached end of life in Kiro on 14 October 2026. Kiro doesn't switch it for you

### Mistral Vibe CLI

1. Pass `--agent` on every `-p` run (`plan` is read-only). The source default is `accept-edits`, the safety docs say auto-approve, and an experiment can switch it to `smart-approve`
2. Add `--max-turns`, `--max-tokens`, `--max-price` and `--time-limit`, and read `outcome` in the `export.json` that `--output-dir` writes. Exit 3 means a limit or a refusal
3. Run in a container or behind `--agent-socket` before using `--auto-approve`. Vibe has no sandbox of its own on the host
4. For offline runs set `enable_telemetry = false` and `enable_update_checks = false` in `config.toml`. The docs' `enable_auto_update` isn't the key the code reads
5. Use 2.25.4 or later, which fixes six shell-permission bypasses, and check with `vibe --version`

## Questions

### Which is better for AI agents, Kiro CLI or Mistral Vibe CLI?

Mistral Vibe CLI scores 62.9 (B) on agent readiness against Kiro CLI's 60.6 (C), and leads in 5 of 7 scored categories. Kiro CLI leads on security & auth.

### Are Kiro CLI and Mistral Vibe CLI open source?

No open-source release is listed for Kiro CLI. Mistral Vibe CLI is open source (Apache-2.0).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/kiro-cli-vs-mistral-vibe-cli.json, and with the fewest tokens: https://www.anchorterminal.com/compare/kiro-cli-vs-mistral-vibe-cli.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "kiro-cli", "b": "mistral-vibe-cli"}`. From a terminal: `anchor compare kiro-cli mistral-vibe-cli`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/kiro-cli.json and https://www.anchorterminal.com/api/v1/tools/mistral-vibe-cli.json

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