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Head to head · Agent harnesses · October 2026 research run

Antigravity CLI vs OpenMausBot

OpenMausBot scores 65.4 (B) on agent readiness against Antigravity CLI's 57.6 (C), and leads in 6 of 7 scored categories. Both do agent harnesses.

Best agent harnesses and coding agents · All 875 harnesses comparisons

Antigravity CLIGoogle · Agent harness C57.6/100#710 of 1238 OpenMausBotSupamaus Software Private Limited · Agent harness B65.4/100#368 of 1238

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

OpenMausBot B

Best for A person or an outside agent who wants several CLI agents (Claude Code, Codex, Grok, ACP CLIs) organised as named bots with their own computers, routines and approvals, driven by MCP or a CLI.

Ahead on

  • Reliability, 60 against 43
  • Schema & documentation, 90 against 78
  • Security & auth, 59 against 53
  • Payments & pricing, 50 against 30
  • Maintenance & community, 74 against 68
  • Transparency & trust, 59 against 53

Also in its favour

  • Runs on your own machine
  • Free to start without a card
  • Open source

Watch for

New bots start at Full access, which approves provider permission requests without a card

Score by category

CategoryWeight this runAntigravity CLIOpenMausBotEdge
Reliability16%204360OpenMausBot +17
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27890OpenMausBot +12
Agent ergonomics13%16.27877Antigravity CLI +1
Security & auth14%17.55359OpenMausBot +6
Payments & pricing10%12.53050OpenMausBot +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86874OpenMausBot +6
Transparency & trust7%8.85359OpenMausBot +6
Negative events≤150-2
TotalC 57.6/100B 65.4/100

Facts side by side

FactAntigravity CLIOpenMausBot
KindAgent harnessAgent harness
VendorGoogleSupamaus Software Private Limited
Hosted endpointno (local only)no (local only)
Transportsstdio
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 PolicyApache-2.0
Tools exposednone20
Read-only variant documentednono
llms.txtyesno
Last release2026-10-082026-10-30
Terms last updatedno date given2026-10-10
Privacy policy last updated2026-10-012026-10-18
Customer content may train modelsyes, with an opt-outnot found in the text
Terms restrict automated accessnot found in the textnot found in the text
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waivernot found in the textnot found in the text
Popularitynone8.2k stars, 3.5k npm/wk

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.

OpenMausBot

A bounded 20-tool MCP server with typed schemas, annotations and idempotent sends, and a headless CLI with JSON output and exit codes, let another agent hand work to a bot team and wait on it. New bots start at Full access, so provider permission requests pass without a card, and usage analytics stay on until switched off.

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

OpenMausBot

  1. Ask the owner for a pairing code from Settings > Phone, exchange it at POST /api/auth/pair, and set OPENMAUSBOT_TOKEN with an explicit OMB_PORT
  2. Pass a send_id with every send_bot_message and send_channel_message, so a retry returns the first receipt
  3. Use wait_for_conversation instead of polling, and on needs-user stop and tell the owner a card is waiting
  4. Check a bot's access level with the owner before sending work. New bots run at Full access unless defaults were changed
  5. Ask the owner to switch off Settings > General > Usage analytics if nothing beyond model calls should leave the machine

Questions

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

OpenMausBot scores 65.4 (B) on agent readiness against Antigravity CLI's 57.6 (C), and leads in 6 of 7 scored categories.

Are Antigravity CLI and OpenMausBot open source?

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

Other comparisons with Antigravity CLI or OpenMausBot

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