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Head to head · Agent harnesses · October 2026 research run

Antigravity CLI vs DeepSeek Harness (dsh)

Antigravity CLI scores 57.4 (C) on agent readiness against DeepSeek Harness (dsh)'s 49.2 (D), and leads in 5 of 7 scored categories. DeepSeek Harness (dsh) leads on payments & pricing. Both do agent harnesses.

Best agent harnesses and coding agents · All 713 harnesses comparisons

Antigravity CLIGoogle · Agent harness C57.4/100#679 of 1146 DeepSeek Harness (dsh)DeepSeek · Agent harness D49.2/100#909 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

  • Reliability, 43 against 33
  • Agent ergonomics, 78 against 68
  • Security & auth, 53 against 40

Also in its favour

  • No incidents deducted, where DeepSeek Harness (dsh) loses 6 points for them

Watch for

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

DeepSeek Harness (dsh) D

Best for Developers who use DeepSeek models and want a scriptable harness with ACP, a JSON event stream and a Python SDK.

Ahead on

  • Payments & pricing, 60 against 30

Also in its favour

  • Free to start without a card
  • Open source

Watch for

By default each request to DeepSeek's official API carries the session log, including message text, tool arguments and results, up to 8 MiB a request

Score by category

CategoryWeight this runAntigravity CLIDeepSeek Harness (dsh)Edge
Reliability16%204333Antigravity CLI +10
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27877Antigravity CLI +1
Agent ergonomics13%16.27868Antigravity CLI +10
Security & auth14%17.55340Antigravity CLI +13
Payments & pricing10%12.53060DeepSeek Harness (dsh) +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86871DeepSeek Harness (dsh) +3
Transparency & trust7%8.85150Antigravity CLI +1
Negative events≤150-6
TotalC 57.4/100D 49.2/100

Facts side by side

FactAntigravity CLIDeepSeek Harness (dsh)
KindAgent harnessAgent harness
VendorGoogleDeepSeek
Hosted endpointno (local only)no (local only)
Transports
AuthOAuth or keyAPI 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 release2026-10-082026-10-17
Terms last updatedno date givenno document linked
Privacy policy last updated2026-10-01no document linked
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
Popularitynone245k 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.

DeepSeek Harness (dsh)

Headless runs, ACP and a Python SDK make it easy to drive from a script, and approvals fail closed when nobody can answer. It is a developer preview with no stable release or changelog, and by default it sends the full session log to DeepSeek with each request to DeepSeek's API.

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

DeepSeek Harness (dsh)

  1. Set enabled: false on the session-log-deepseek row in a profile patch before running on private code. Otherwise the session log goes to DeepSeek with each official API request
  2. Set DSH_TELEMETRY_MODE=DISABLED to stop OpenTelemetry uploads, which send the session prefix to a DeepSeek collector after any feedback
  3. Treat exit code 1 and the turn_end reason as failure. A --json stream can end with a final event for a failed run
  4. Run in a disposable container or VM. The sandbox doesn't confine reads or network, and SAFETY.md says the project has had no security audit
  5. Pin the version. npm latest (0.2.0-rc.2) and next (0.2.1-rc.2) differ, DeepSeek's changelog asks for 0.2.1-rc.1 or later, and the README warns of breaking changes

Questions

Which is better for AI agents, Antigravity CLI or DeepSeek Harness (dsh)?

Antigravity CLI scores 57.4 (C) on agent readiness against DeepSeek Harness (dsh)'s 49.2 (D), and leads in 5 of 7 scored categories. DeepSeek Harness (dsh) leads on payments & pricing.

Are Antigravity CLI and DeepSeek Harness (dsh) open source?

No open-source release is listed for Antigravity CLI. DeepSeek Harness (dsh) is open source (MIT).

Other comparisons with Antigravity CLI or DeepSeek Harness (dsh)

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