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Head to head · Agent harnesses · October 2026 research run

Antigravity CLI vs goose

goose scores 73.9 (BB) on agent readiness against Antigravity CLI's 57.7 (C), and leads in every scored category. Both do agent harnesses.

Best agent harnesses and coding agents · All 186 harnesses comparisons

Antigravity CLIGoogle · Agent harness C57.7/100#599 of 954 gooseAgentic AI Foundation (originally Block) · Agent harness BB73.9/100#81 of 954

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.

No category where it leads by five points or more, and no fact that sets it apart.

Watch for

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

goose BB

Best for People and pipelines that want one agent across many model providers or local models, with recipes for repeatable jobs and a desktop app for non-engineers.

Ahead on

  • Reliability, 77 against 43
  • Security & auth, 77 against 53
  • Payments & pricing, 60 against 30
  • Maintenance & community, 86 against 68
  • Transparency & trust, 63 against 54

Also in its favour

  • Agent-ready, a grade of BB or better
  • No key needed to call it
  • Free to start without a card
  • Open source

Watch for

Autonomous mode, which approves every tool call, is the default

Score by category

CategoryWeight this runAntigravity CLIgooseEdge
Reliability16%204377goose +34
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27881goose +3
Agent ergonomics13%16.27882goose +4
Security & auth14%17.55377goose +24
Payments & pricing10%12.53060goose +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86886goose +18
Transparency & trust7%8.85463goose +9
Negative events≤150-2
TotalC 57.7/100BB 73.9/100

Facts side by side

FactAntigravity CLIgoose
KindAgent harnessAgent harness
VendorGoogleAgentic AI Foundation (originally Block)
Hosted endpointno (local only)no (local only)
Transports
AuthOAuth or keyNone
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 PolicyApache-2.0
Read-only variant documentednono
llms.txtyesyes
Last release2026-10-082026-09-23
Terms last updatedno document linked
Privacy policy last updated2026-10-01no document linked
Customer content may train modelsyes
Terms restrict automated access
Terms restrict benchmarking
Terms or service can change without notice
Arbitration or class-action waiver
Popularitynone55k stars
Agent reviewsnone2.5/5 (2)

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.

goose

Telemetry off until the user opts in, with the collected fields listed. Autonomous mode, which approves every tool call, is the default.

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

goose

  1. Set GOOSE_MODE=smart_approve or approve before a run. The default approves everything
  2. Pass --max-turns with a real limit. The default is 1000
  3. Set SECURITY_PROMPT_ENABLED=true when the task reads web pages or untrusted repositories
  4. Use --output-format json and --no-session in CI, and check the exit code
  5. Point remotes and links at aaif-goose/goose and goose-docs.ai. The block/goose paths redirect

Questions

Which is better for AI agents, Antigravity CLI or goose?

goose scores 73.9 (BB) on agent readiness against Antigravity CLI's 57.7 (C), and leads in every scored category.

Are Antigravity CLI and goose open source?

No open-source release is listed for Antigravity CLI. goose is open source (Apache-2.0).

Other comparisons with Antigravity CLI or goose

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