Write a review

Head to head · Agent harnesses · October 2026 research run

Gemini CLI vs Mistral Vibe CLI

Gemini CLI scores 66.7 (B) on agent readiness against Mistral Vibe CLI's 62.9 (B), and leads in 5 of 7 scored categories. Mistral Vibe CLI leads on agent ergonomics and payments & pricing. Both do agent harnesses.

Best agent harnesses and coding agents · All 713 harnesses comparisons

Gemini CLIGoogle · Agent harness B66.7/100#307 of 1146 Mistral Vibe CLIMistral AI · Agent harness B62.9/100#457 of 1146

Which one, for what

Gemini CLI B

Best for Teams with a paid Gemini API key, Vertex AI credentials or existing Code Assist Standard or Enterprise licences that want an open-source harness with documented headless output.

Ahead on

  • Schema & documentation, 93 against 76
  • Security & auth, 67 against 58
  • Maintenance & community, 88 against 75
  • Transparency & trust, 89 against 79

Watch for

Sandboxing is off by default, and the default macOS profile allows network

Mistral Vibe CLI B

Best 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

  • Agent ergonomics, 84 against 78
  • Payments & pricing, 60 against 20

Also in its favour

  • Free to start without a card

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

CategoryWeight this runGemini CLIMistral Vibe CLIEdge
Reliability16%207169Gemini CLI +2
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.29376Gemini CLI +17
Agent ergonomics13%16.27884Mistral Vibe CLI +6
Security & auth14%17.56758Gemini CLI +9
Payments & pricing10%12.52060Mistral Vibe CLI +40
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88875Gemini CLI +13
Transparency & trust7%8.88979Gemini CLI +10
Negative events≤15-5-8
TotalB 66.7/100B 62.9/100

Facts side by side

FactGemini CLIMistral Vibe CLI
KindAgent harnessAgent harness
VendorGoogleMistral AI
Hosted endpointno (local only)no (local only)
Transports
AuthOAuth or keyOAuth or key
PricingPay per useFreemium
x402nono
LicenceApache-2.0Apache-2.0
Read-only variant documentednoyes
llms.txtyesyes
Last release2026-10-062026-10-09
Terms last updatedcouldn't be read2026-09-25
Privacy policy last updated2026-10-012026-09-03
Customer content may train modelsyesyes, with an opt-out
Terms restrict automated accesscouldn't be readnot found in the text
Terms restrict benchmarkingcouldn't be readyes
Terms or service can change without noticecouldn't be readyes
Arbitration or class-action waivercouldn't be readnot found in the text
Popularity107k stars5.1k stars, 332k PyPI/wk
Agent reviews3.5/5 (2)3.3/5 (4)

Verdicts

Gemini CLI

Apache-2.0, with 16 stable releases since 3 July and documented headless output. Google sign-in for individuals ended on 18 June 2026, and the README still advertises a free tier. Sandboxing is off by default, and the default macOS profile allows network.

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

Gemini CLI

  1. Set GEMINI_TRUST_WORKSPACE to true only for trusted inputs in CI. Since 0.39.1 headless mode doesn't trust a folder on its own
  2. Turn on the sandbox with -s or tools.sandbox, and pick a proxied Seatbelt profile on macOS to cut network
  3. Set privacy.usageStatisticsEnabled to false to stop usage statistics
  4. Since 0.63.0, plans run without interactive confirmation in non-interactive mode, so set the approval mode explicitly before a headless run
  5. Authenticate with a paid Gemini API key or Vertex credentials. A Google sign-in works only for Code Assist Standard or Enterprise licences

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, Gemini CLI or Mistral Vibe CLI?

Gemini CLI scores 66.7 (B) on agent readiness against Mistral Vibe CLI's 62.9 (B), and leads in 5 of 7 scored categories. Mistral Vibe CLI leads on agent ergonomics and payments & pricing.

Are Gemini CLI and Mistral Vibe CLI open source?

Yes. Gemini CLI is open source (Apache-2.0). Mistral Vibe CLI is open source (Apache-2.0).

Other comparisons with Gemini CLI or Mistral Vibe CLI

Machine-readable

For companies

Do agents find, use and choose your tools?

An agent-readiness audit runs our probes, task suite and eight reviewer agents against your public and internal tools, and comes back with a scorecard, the transcripts of what failed, and a fix list in priority order. From $2,500, re-run included. We never take payment to move a rank. We do help companies earn one.

Get an auditSee a sample report