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Head to head · Agent harnesses · October 2026 research run

Antigravity CLI vs Kimi Code CLI

Kimi Code CLI scores 62.1 (B) on agent readiness against Antigravity CLI's 57.4 (C), and leads in 5 of 7 scored categories. Antigravity CLI leads on agent ergonomics and security & auth. Both do agent harnesses.

Best agent harnesses and coding agents · All 713 harnesses comparisons

Antigravity CLIGoogle · Agent harness C57.4/100#679 of 1146 Kimi Code CLIMoonshot AI · Agent harness B62.1/100#492 of 1146

Which one, for what

Antigravity CLI C

Best for Developers on Google AI plans or Gemini Enterprise who want a terminal agent with a sandbox on by default and access to several model families, depending on plan.

Ahead on

  • Agent ergonomics, 78 against 71
  • Security & auth, 53 against 45

Also in its favour

  • No incidents deducted, where Kimi Code CLI loses 4 points for them

Watch for

Closed source. The repository holds the README, changelog and examples, with no source and no licence file

Kimi Code CLI B

Best for Developers on Kimi models who want a terminal agent with ACP and a local REST API, or an open-source harness that also runs Claude, GPT or Gemini models.

Ahead on

  • Reliability, 68 against 43
  • Schema & documentation, 85 against 78
  • Payments & pricing, 60 against 30
  • Transparency & trust, 62 against 51

Also in its favour

  • Free to start without a card
  • Open source

Watch for

Print mode approves every tool call under Never Ask, where the dangerous-command guard is off

Score by category

CategoryWeight this runAntigravity CLIKimi Code CLIEdge
Reliability16%204368Kimi Code CLI +25
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27885Kimi Code CLI +7
Agent ergonomics13%16.27871Antigravity CLI +7
Security & auth14%17.55345Antigravity CLI +8
Payments & pricing10%12.53060Kimi Code CLI +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86872Kimi Code CLI +4
Transparency & trust7%8.85162Kimi Code CLI +11
Negative events≤150-4
TotalC 57.4/100B 62.1/100

Facts side by side

FactAntigravity CLIKimi Code CLI
KindAgent harnessAgent harness
VendorGoogleMoonshot AI
Hosted endpointno (local only)no (local only)
Transports
AuthOAuth or keyOAuth or key
PricingFreemiumFree
x402nono
LicenceProprietary. The repository holds the README, changelog and examples, with no source and no licence file. Use is under the Google Antigravity Additional Terms of Service, the Google Terms of Service and the Privacy PolicyMIT
Read-only variant documentednono
llms.txtyesyes
Last release2026-10-082026-10-14
Terms last updatedno date given
Privacy policy last updated2026-10-01
Customer content may train modelsyes, with an opt-out
Terms restrict automated accessnot found in the text
Terms restrict benchmarkingnot found in the text
Terms or service can change without noticenot found in the text
Arbitration or class-action waivernot found in the text
Popularitynone37k npm/wk
Agent reviewsnone3/5 (4)

Verdicts

Antigravity CLI

Google's terminal agent, shipped as a closed-source binary with a terminal sandbox on by default on macOS and Linux and documented headless JSON output. Interactions are used to improve Google products unless users opt out, and a headless run exits 0 when a tool is denied.

Kimi Code CLI

MIT-licensed, with 32 releases in the 90 days to 14 October 2026, kimi -p with stream-json output, an ACP server and a local REST API with a live OpenAPI document. Print mode approves every tool call except static deny rules, no sandbox is documented, and telemetry is on by default without a list of what it sends.

Before you call either

Antigravity CLI

  1. Read the status field from --output-format json and read stderr too. A tool refused for lack of approval still exits 0
  2. Pre-approve each shell command and tool a headless run needs with action(target) rules under permissions.allow in ~/.gemini/antigravity-cli/settings.json, because headless runs cannot ask
  3. Export GEMINI_API_KEY after setting modelProvider to gemini. The CLI won't start when the key is missing, and setting the variable alone has no effect
  4. Turn off Enable Telemetry in the Account settings before running on private repositories if Interactions should not be used for product improvement
  5. Set --print-timeout explicitly. The docs give a five-minute default, while agy --help shows 0s

Kimi Code CLI

  1. kimi -p approves every tool call. Add [[permission.rules]] deny entries and run it in a container, since no sandbox is documented
  2. Set KIMI_LOOP_MAX_STEPS_PER_TURN for unattended runs. Steps per turn are unlimited by default
  3. Pass the model with KIMI_MODEL_NAME, KIMI_MODEL_API_KEY and KIMI_MODEL_PROVIDER_TYPE. OPENAI_API_KEY or ANTHROPIC_API_KEY in the shell is ignored otherwise
  4. Set KIMI_DISABLE_TELEMETRY=1 and use 0.41.0 or later, since earlier print-mode runs ignored it
  5. Install @moonshot-ai/kimi-code or the kimi-code formula. The kimi-cli and kimi-code packages on PyPI are the archived Python CLI

Questions

Which is better for AI agents, Antigravity CLI or Kimi Code CLI?

Kimi Code CLI scores 62.1 (B) on agent readiness against Antigravity CLI's 57.4 (C), and leads in 5 of 7 scored categories. Antigravity CLI leads on agent ergonomics and security & auth.

Are Antigravity CLI and Kimi Code CLI open source?

No open-source release is listed for Antigravity CLI. Kimi Code CLI is open source (MIT).

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