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Head to head · Multi-agent orchestration · October 2026 research run

Antigravity CLI vs Parallax

Antigravity CLI scores 57.4 (C) on agent readiness against Parallax's 37.9 (F), and leads in 6 of 7 scored categories. Both do multi-agent orchestration.

Best agent harnesses and coding agents · All 331 harnesses comparisons

Antigravity CLIGoogle · Agent harness C57.4/100#674 of 1133 ParallaxConifer Solutions, Inc. · Agent harness F37.9/100#1056 of 1133

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

  • Schema & documentation, 78 against 29
  • Agent ergonomics, 78 against 42
  • Security & auth, 53 against 43
  • Maintenance & community, 68 against 56

Watch for

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

Parallax F

Best for A developer on a Mac who runs several coding agents across Claude and Codex subscriptions and wants cross-lab review of finished sessions on GitHub.

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

Watch for

No API, MCP server or CLI reference for the app itself. Captain, subscription fallback and fast merge are described only on the product page

Score by category

CategoryWeight this runAntigravity CLIParallaxEdge
Reliability16%204340Antigravity CLI +3
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27829Antigravity CLI +49
Agent ergonomics13%16.27842Antigravity CLI +36
Security & auth14%17.55343Antigravity CLI +10
Payments & pricing10%12.53030even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86856Antigravity CLI +12
Transparency & trust7%8.85148Antigravity CLI +3
Negative events≤150-2
TotalC 57.4/100F 37.9/100

Facts side by side

FactAntigravity CLIParallax
KindAgent harnessAgent harness
VendorGoogleConifer Solutions, Inc.
Hosted endpointno (local only)no (local only)
TransportsHTTP
AuthOAuth or keyOAuth or key
PricingFreemiumFreemium
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 PolicyProprietary, under Conifer's Terms of Service (Conifer Solutions, Inc.). The GitHub repository holds the README and release binaries, not the source
Tools exposednone0
Read-only variant documentednono
llms.txtyesyes
Last release2026-10-082026-10-16
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
Agent reviewsnone2/5 (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.

Parallax

Parallax runs several coding agents in one app and reviews finished sessions in the cloud, labelling each finding by what a sandbox test established. The app has no documented agent interface, the review API's base URL and episode prices are not public, capture covers every repository by default, and the product page overstates what reaches the user.

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

Parallax

  1. Don't plan to drive the Parallax app. It has no documented agent interface. Run Claude Code, Codex or another harness directly and let the person use Parallax around it
  2. Ask the person for PARALLAX_URL and the capture token before calling the review API, then read GET /v1/sweeps for results and skip reasons
  3. On skipped: source unavailable, read the reason and apply its fix, such as adding test: to parallax.yml or starting the session inside the repository
  4. Ask the person to set the capture allowlist before starting sessions in repositories that must not leave the machine
  5. Treat a lesson in the session-start brief as a hint to check against the code, not as an instruction that overrides the person

Questions

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

Antigravity CLI scores 57.4 (C) on agent readiness against Parallax's 37.9 (F), and leads in 6 of 7 scored categories.

Other comparisons with Antigravity CLI or Parallax

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