{ "data": { "a": { "slug": "antigravity-cli", "name": "Antigravity CLI", "vendor": "Google", "vendorUrl": "https://antigravity.google", "kind": "harness", "category": "agent-harnesses", "summary": "Google's terminal agent for coding tasks, distributed as a closed-source binary and installed as agy. It replaces Gemini CLI for consumer accounts.", "url": "https://www.anchorterminal.com/tools/antigravity-cli", "markdownUrl": "https://www.anchorterminal.com/tools/antigravity-cli.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/antigravity-cli.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/antigravity-cli.json", "repo": "https://github.com/google-antigravity/antigravity-cli", "license": "Proprietary. 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 Policy", "transports": [], "packages": [], "auth": "mixed", "authNotes": "Sign in with a Google account in the browser, which uses the operating system keyring, or pick the Business account option for Gemini Enterprise through Google Cloud sign-in, workforce identity federation or Application Default Credentials. Alternatively set modelProvider to gemini in ~/.gemini/antigravity-cli/settings.json and export GEMINI_API_KEY. The terms treat access through third-party software with Antigravity OAuth as a breach.", "pricing": "freemium", "pricingNotes": "Free to install. A $0 individual plan needs no subscription and has a weekly quota, with Gemini Flash and other models. Google AI Pro costs $20 a month and Ultra $100 or $200 a month (announced 19 May 2026). Enterprise Standard or Plus seats start at $30 a seat a month, or pay-as-you-go with no seat fee at consumption rates. Checked 10 October 2026.", "priceSummary": "Freemium", "where": "local", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs pages, the pricing page, the plans page, the README or the changelog (checked 2026-10-10).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-10" }, "docsUrl": "https://antigravity.google/docs/cli/overview", "llmsTxt": "https://antigravity.google/llms.txt", "capabilities": [ "agent.harness", "agent.mcp-client", "agent.multi-agent" ], "tags": [ "official", "harness", "coding-agent", "cli", "closed-source", "mcp", "llms-txt", "sandbox-default", "telemetry-opt-out", "subagents", "hooks", "plugins", "paid-plans", "gemini-models", "third-party-models" ], "lastRelease": "2026-10-08", "graded": true, "anchor": { "graded": true, "score": 57.7, "grade": "C", "agentReady": false, "rank": 599, "ranked": true, "rankOf": 954, "categoryRank": 15, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 78, "maintenance": 68, "payments": 30, "reliability": 43, "schema": 78, "security": 53, "transparency": 54 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-10" }, "negative": 0, "verdict": "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.", "bestFor": "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.", "strengths": [ "The sandbox is on under the Default preset on macOS and Linux, hides ~/.ssh and .env, and limits network access to approved domains", "Headless `agy -p` runs with `--output-format json` or `stream-json`, a status field with SUCCESS, ERROR and other terminal states, and token usage in the result event", "MCP clients for stdio, Streamable HTTP, SSE and WebSocket servers, with unconfigured MCP tools set to ask first and allow rules by server and tool", "Skills, subagents, PreToolUse and PostToolUse hooks, and plugins from an official marketplace that `/plugin` manages", "The installer verifies a SHA-512 checksum against a manifest on Google's release server before it installs" ], "weaknesses": [ "Closed source. The repository holds the README, changelog and examples, with no source and no licence file", "Interactions are used to improve Google and Alphabet products and models, and Google staff and contractors may review them, unless the user opts out", "The sandbox is labelled preview in the permissions docs, and Windows still uses the older permission model that the docs describe separately", "A headless run exits 0 when a tool that needs approval is refused, and the only sign is a notice on stderr", "The plans page gives no request counts for the weekly quota, which Google sets by available capacity" ], "agentNotes": [ "Read the `status` field from `--output-format json` and read stderr too. A tool refused for lack of approval still exits 0", "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", "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", "Turn off Enable Telemetry in the Account settings before running on private repositories if Interactions should not be used for product improvement", "Set `--print-timeout` explicitly. The docs give a five-minute default, while `agy --help` shows 0s" ], "metrics": { "kind": "local", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 57.7 } ], "editorialScores": { "ergonomics": 78, "maintenance": 68, "payments": 30, "reliability": 43, "schema": 78, "security": 53, "transparency": 52 }, "provenanceScore": 56 }, "connect": { "install": "curl -fsSL https://antigravity.google/cli/install.sh | bash", "headless": { "run": "agy -p \"fix the failing test\" --output-format json" } }, "letme": { "capability": "https://letme.dev/agent.harness", "tool": "https://letme.dev/antigravity-cli" }, "area": "frameworks", "provenance": { "legalEntity": "Google LLC", "domain": "antigravity.google", "domainRegistered": "", "endpointOnVendorDomain": null, "terms": "https://antigravity.google/terms", "privacy": "https://policies.google.com/privacy", "statusPage": "", "changelog": "https://antigravity.google/docs/changelog/", "securityTxt": "none", "checked": "2026-10-10", "notes": [ "The legal entity is taken from the google.com check on the Gemini CLI listing. The Antigravity terms name Google without an entity.", "antigravity.google serves no security.txt (both /.well-known/security.txt and /security.txt answered 404 on 10 October 2026). google.com has a valid one, with reports to g.co/vulnz.", "No status page for the CLI was found in the docs, and the domain's registration date was not read." ], "score": 56 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/antigravity-cli.json" }, "answer": "Prime Agent scores 60.5 (C) on agent readiness against Antigravity CLI's 57.7 (C), and leads in 4 of 7 scored categories. Antigravity CLI leads on schema \u0026 documentation and agent ergonomics.", "b": { "slug": "prime-agent", "name": "Prime Agent", "vendor": "Prime Intellect", "vendorUrl": "https://www.primeintellect.ai", "kind": "harness", "category": "agent-harnesses", "summary": "Prime Agent is an open-source coding and research agent from Prime Intellect, run from a terminal. The model works through a persistent Python REPL, spawns subagents as function calls and keeps sessions running in a background daemon.", "url": "https://www.anchorterminal.com/tools/prime-agent", "markdownUrl": "https://www.anchorterminal.com/tools/prime-agent.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/prime-agent.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/prime-agent.json", "repo": "https://github.com/PrimeIntellect-ai/prime-agent", "license": "MIT", "transports": [], "packages": [], "auth": "none", "authNotes": "No account of its own is required. `/login` on first launch picks a subscription or an API-key provider, and provider keys can also come from environment variables such as `ANTHROPIC_API_KEY`, `OPENAI_API_KEY`, `OPENROUTER_API_KEY` or `PRIME_API_KEY`.", "pricing": "free", "pricingNotes": "Free and MIT-licensed, with nothing to buy for the agent itself. The model provider is paid separately, and Prime Intellect's own inference service is one of the providers.", "priceSummary": "Free · OSS", "where": "local", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the README or the source (checked 2026-10-08).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 21614, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-08" }, "docsUrl": "https://github.com/PrimeIntellect-ai/prime-agent#readme", "capabilities": [ "agent.harness", "agent.mcp-client", "agent.multi-agent" ], "tags": [ "open-source", "local", "free", "no-card", "rust", "mcp", "telemetry-default-on", "pre-1.0", "beta" ], "lastRelease": "2026-10-07", "graded": true, "anchor": { "graded": true, "score": 60.5, "grade": "C", "agentReady": false, "rank": 512, "ranked": true, "rankOf": 954, "categoryRank": 10, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 73, "maintenance": 79, "payments": 60, "reliability": 65, "schema": 42, "security": 50, "transparency": 64 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "Budgets for turns, tokens and time bound an autonomous run, and sessions survive a closed terminal through a supervising daemon. Model-written Python and shell commands run with the user's rights, with no approval step and no sandbox, and the Rust build on the main branch ships only as nightly betas.", "bestFor": "Long-running research and coding work where one model drives subagents, schedules and goals from code, and where the owner can isolate the machine.", "strengths": [ "MIT licence, with CI on main passing on 8 October 2026 (fmt, clippy with warnings as errors, sharded tests, cargo-deny)", "Three model tools (bash, edit, ipython). MCP tools are found and called from Python, so their definitions stay out of the prompt", "Autonomous mode takes limits on turns, tokens, time and continuations, plus user-defined quality gates with retries", "A daemon supervises one worker per session, restarts it with backoff and restores from append-only JSONL session files", "Telemetry is disclosed on first run, carries primitive values only and has four documented ways to turn it off" ], "weaknesses": [ "No approval prompts and no sandbox. The README says the worker and kernel processes are not a security sandbox", "The stable channel (v0.9.8, 29 September 2026) is the TypeScript build. The Rust code on main ships only as nightly betas", "No documentation site for Prime Agent. Headless, JSON, RPC and ACP modes are described only in source and crate READMEs", "Usage telemetry is on by default, and the vendor privacy policy (updated 23 February 2024) does not describe it", "No SECURITY.md in the repository, and public issues and unsolicited pull requests are closed automatically" ], "agentNotes": [ "Run it in a disposable clone, container or VM. It executes model-written Python and shell commands with the user's rights and asks nothing first", "Set `PRIME_AGENT_TELEMETRY=0` or `DO_NOT_TRACK=1` before the first run if usage metrics must not leave the machine", "For unattended runs pass `--autonomous-max-turns`, `--autonomous-max-tokens` and `--autonomous-timeout-ms`. Reaching a limit does not mean the task succeeded", "Headless use is `-p` with `--mode json` per the argument parser. A provider key must already be configured, because `/login` is interactive", "The `-t/--tools`, `-nt/--no-tools` and `-nbt/--no-builtin-tools` flags were removed and now fail as unknown options" ], "metrics": { "kind": "local", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 60.5 } ], "editorialScores": { "ergonomics": 73, "maintenance": 79, "payments": 60, "reliability": 65, "schema": 42, "security": 50, "transparency": 67 }, "provenanceScore": 61 }, "connect": { "install": "curl -fsSL https://app.primeintellect.ai/prime-agent/install.sh | sh" }, "letme": { "capability": "https://letme.dev/agent.harness", "tool": "https://letme.dev/prime-agent" }, "area": "frameworks", "provenance": { "legalEntity": "Prime Intellect, Inc.", "domain": "primeintellect.ai", "domainRegistered": "", "endpointOnVendorDomain": null, "terms": "https://www.primeintellect.ai/terms-of-service", "privacy": "https://www.primeintellect.ai/privacy-policy", "statusPage": "https://status.primeintellect.ai", "changelog": "https://github.com/PrimeIntellect-ai/prime-agent/releases", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The site footer, terms and privacy policy name Prime Intellect, Inc. of Dover, Delaware. The repository LICENSE names Prime Intellect Ltd. as copyright holder.", "www.primeintellect.ai/.well-known/security.txt returned 404 on 8 October 2026. A security policy with a reporting address is at https://www.primeintellect.ai/security.", "The status page covers Prime Intellect's hosted platform (API, inference, sandboxes), not the locally run agent.", "The LICENSE adds that the software is a port of the Prime Agent TypeScript product, originally copyright 2025 Mario Zechner, used under the MIT licence. GitHub's licence detector reports the file as unrecognised." ], "score": 61 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/prime-agent.json", "live": { "slug": "prime-agent", "vendorStatus": { "page": "https://status.primeintellect.ai", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-10T11:53:33.213171863Z" }, "versions": [ { "registry": "github", "name": "PrimeIntellect-ai/prime-agent", "version": "v0.9.8", "released": "2026-09-29", "seenAt": "2026-10-09T17:14:29.553506425Z" } ], "githubStars": 21637, "securityTxt": { "url": "https://primeintellect.ai/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-09T15:40:34.305932562Z" }, "pages": [ { "url": "https://www.primeintellect.ai/privacy-policy", "kind": "privacy", "status": 200, "checkedAt": "2026-10-09T18:53:15.342387762Z", "changedAt": "2026-10-09T18:53:15.342387762Z", "fingerprint": "cd02a9a0df99" }, { "url": "https://www.primeintellect.ai/terms-of-service", "kind": "terms", "status": 200, "checkedAt": "2026-10-09T18:53:17.572077471Z", "changedAt": "2026-10-09T18:53:17.572077471Z", "fingerprint": "c1fed61cb381" } ], "updatedAt": "2026-10-10T11:53:33.213171863Z" } }, "facts": [ { "a": "Agent harness", "b": "Agent harness", "name": "Kind" }, { "a": "Google", "b": "Prime Intellect", "name": "Vendor" }, { "a": "no (local only)", "b": "no (local only)", "name": "Hosted endpoint" }, { "a": "", "b": "", "name": "Transports" }, { "a": "OAuth or key", "b": "None", "name": "Auth" }, { "a": "Freemium", "b": "Free", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Proprietary. 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 Policy", "b": "MIT", "name": "Licence" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "no", "name": "llms.txt" }, { "a": "2026-10-08", "b": "2026-10-07", "name": "Last release" }, { "a": "", "b": "no date given", "name": "Terms last updated" }, { "a": "2026-10-01", "b": "no date given", "name": "Privacy policy last updated" }, { "a": "yes", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "", "b": "yes", "name": "Terms restrict automated access" }, { "a": "", "b": "yes", "name": "Terms restrict benchmarking" }, { "a": "", "b": "yes", "name": "Terms or service can change without notice" }, { "a": "", "b": "yes", "name": "Arbitration or class-action waiver" }, { "a": "none", "b": "22k stars", "name": "Popularity" } ], "faq": [ { "answer": "Prime Agent scores 60.5 (C) on agent readiness against Antigravity CLI's 57.7 (C), and leads in 4 of 7 scored categories. Antigravity CLI leads on schema \u0026 documentation and agent ergonomics.", "question": "Which is better for AI agents, Antigravity CLI or Prime Agent?" }, { "answer": "No open-source release is listed for Antigravity CLI. Prime Agent is open source (MIT).", "question": "Are Antigravity CLI and Prime Agent open source?" } ], "goodFor": [ { "aheadOn": [ "Schema \u0026 documentation, 78 against 42", "Agent ergonomics, 78 against 73" ], "also": null, "goodFor": "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.", "slug": "antigravity-cli", "watchFor": "Closed source. The repository holds the README, changelog and examples, with no source and no licence file" }, { "aheadOn": [ "Reliability, 65 against 43", "Payments \u0026 pricing, 60 against 30", "Maintenance \u0026 community, 79 against 68", "Transparency \u0026 trust, 64 against 54" ], "also": [ "No key needed to call it", "Free to start without a card", "Open source" ], "goodFor": "Long-running research and coding work where one model drives subagents, schedules and goals from code, and where the owner can isolate the machine.", "slug": "prime-agent", "watchFor": "No approval prompts and no sandbox. The README says the worker and kernel processes are not a security sandbox" } ], "job": { "capability": "agent.harness", "name": "Agent harnesses" }, "others": [ { "json": "https://www.anchorterminal.com/compare/aider-vs-antigravity-cli.json", "title": "Aider vs Antigravity CLI", "url": "https://www.anchorterminal.com/compare/aider-vs-antigravity-cli" }, { "json": "https://www.anchorterminal.com/compare/aider-vs-prime-agent.json", "title": "Aider vs Prime Agent", "url": "https://www.anchorterminal.com/compare/aider-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/amp-vs-antigravity-cli.json", "title": "Amp vs Antigravity CLI", "url": "https://www.anchorterminal.com/compare/amp-vs-antigravity-cli" }, { "json": "https://www.anchorterminal.com/compare/amp-vs-prime-agent.json", "title": "Amp vs Prime Agent", "url": "https://www.anchorterminal.com/compare/amp-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-claude-code.json", "title": "Antigravity CLI vs Claude Code", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-claude-code" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-cline.json", "title": "Antigravity CLI vs Cline", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-cline" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-cursor-cli.json", "title": "Antigravity CLI vs Cursor CLI", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-cursor-cli" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-devin.json", "title": "Antigravity CLI vs Devin", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-devin" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-droid-cli.json", "title": "Antigravity CLI vs Droid CLI", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-droid-cli" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-earendil-pi.json", "title": "Antigravity CLI vs Pi", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-earendil-pi" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-gemini-cli.json", "title": "Antigravity CLI vs Gemini CLI", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-gemini-cli" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-github-copilot-cli.json", "title": "Antigravity CLI vs GitHub Copilot CLI", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-github-copilot-cli" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-goose.json", "title": "Antigravity CLI vs goose", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-goose" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-kilo-code-cli.json", "title": "Antigravity CLI vs Kilo Code CLI", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-kilo-code-cli" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-kiro-cli.json", "title": "Antigravity CLI vs Kiro CLI", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-kiro-cli" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-openai-codex.json", "title": "Antigravity CLI vs OpenAI Codex", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-openai-codex" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-opencode.json", "title": "Antigravity CLI vs OpenCode", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-opencode" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-openhands.json", "title": "Antigravity CLI vs OpenHands", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-openhands" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-qwen-code.json", "title": "Antigravity CLI vs Qwen Code", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-qwen-code" }, { "json": "https://www.anchorterminal.com/compare/claude-code-vs-prime-agent.json", "title": "Claude Code vs Prime Agent", "url": "https://www.anchorterminal.com/compare/claude-code-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/cline-vs-prime-agent.json", "title": "Cline vs Prime Agent", "url": "https://www.anchorterminal.com/compare/cline-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/cursor-cli-vs-prime-agent.json", "title": "Cursor CLI vs Prime Agent", "url": "https://www.anchorterminal.com/compare/cursor-cli-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/devin-vs-prime-agent.json", "title": "Devin vs Prime Agent", "url": "https://www.anchorterminal.com/compare/devin-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/droid-cli-vs-prime-agent.json", "title": "Droid CLI vs Prime Agent", "url": "https://www.anchorterminal.com/compare/droid-cli-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-prime-agent.json", "title": "Pi vs Prime Agent", "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/gemini-cli-vs-prime-agent.json", "title": "Gemini CLI vs Prime Agent", "url": "https://www.anchorterminal.com/compare/gemini-cli-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-prime-agent.json", "title": "GitHub Copilot CLI vs Prime Agent", "url": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/goose-vs-prime-agent.json", "title": "goose vs Prime Agent", "url": "https://www.anchorterminal.com/compare/goose-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-prime-agent.json", "title": "Kilo Code CLI vs Prime Agent", "url": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/kiro-cli-vs-prime-agent.json", "title": "Kiro CLI vs Prime Agent", "url": "https://www.anchorterminal.com/compare/kiro-cli-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/openai-codex-vs-prime-agent.json", "title": "OpenAI Codex vs Prime Agent", "url": "https://www.anchorterminal.com/compare/openai-codex-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/opencode-vs-prime-agent.json", "title": "OpenCode vs Prime Agent", "url": "https://www.anchorterminal.com/compare/opencode-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/openhands-vs-prime-agent.json", "title": "OpenHands vs Prime Agent", "url": "https://www.anchorterminal.com/compare/openhands-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/prime-agent-vs-qwen-code.json", "title": "Prime Agent vs Qwen Code", "url": "https://www.anchorterminal.com/compare/prime-agent-vs-qwen-code" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-paperclip.json", "title": "Antigravity CLI vs Paperclip", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-paperclip" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-prime-agent.json", "title": "Paperclip vs Prime Agent", "url": "https://www.anchorterminal.com/compare/paperclip-vs-prime-agent" } ], "scores": [ { "antigravity-cli": 43, "by": 22, "edge": "prime-agent", "key": "reliability", "name": "Reliability", "prime-agent": 65, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "antigravity-cli": 78, "by": 36, "edge": "antigravity-cli", "key": "schema", "name": "Schema \u0026 documentation", "prime-agent": 42, "weight": 13 }, { "antigravity-cli": 78, "by": 5, "edge": "antigravity-cli", "key": "ergonomics", "name": "Agent ergonomics", "prime-agent": 73, "weight": 13 }, { "antigravity-cli": 53, "by": 3, "edge": "antigravity-cli", "key": "security", "name": "Security \u0026 auth", "prime-agent": 50, "weight": 14 }, { "antigravity-cli": 30, "by": 30, "edge": "prime-agent", "key": "payments", "name": "Payments \u0026 pricing", "prime-agent": 60, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "antigravity-cli": 68, "by": 11, "edge": "prime-agent", "key": "maintenance", "name": "Maintenance \u0026 community", "prime-agent": 79, "weight": 7 }, { "antigravity-cli": 54, "by": 10, "edge": "prime-agent", "key": "transparency", "name": "Transparency \u0026 trust", "prime-agent": 64, "weight": 7 } ], "summary": "Prime Agent scores 60.5 (C) on agent readiness against Antigravity CLI's 57.7 (C), and leads in 4 of 7 scored categories. Antigravity CLI leads on schema \u0026 documentation and agent ergonomics. Both do agent harnesses.", "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.", "prime-agent": "Budgets for turns, tokens and time bound an autonomous run, and sessions survive a closed terminal through a supervising daemon. Model-written Python and shell commands run with the user's rights, with no approval step and no sandbox, and the Rust build on the main branch ships only as nightly betas." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/antigravity-cli-vs-prime-agent", "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-prime-agent.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/antigravity-cli-vs-prime-agent.md", "slim": "https://www.anchorterminal.com/compare/antigravity-cli-vs-prime-agent.min.md" }, "markdown": "Prime Agent scores 60.5 (C) on agent readiness against Antigravity CLI's 57.7 (C), and leads in 4 of 7 scored categories. Antigravity CLI leads on schema \u0026 documentation and agent ergonomics. Both do agent harnesses.\n\n- Antigravity CLI: grade C, 57.7/100, rank #599 of 954. Markdown https://www.anchorterminal.com/tools/antigravity-cli.md · JSON https://www.anchorterminal.com/api/v1/tools/antigravity-cli.json\n- Prime Agent: grade C, 60.5/100, rank #512 of 954. Markdown https://www.anchorterminal.com/tools/prime-agent.md · JSON https://www.anchorterminal.com/api/v1/tools/prime-agent.json\n- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md\n- All 186 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md\n\n## Which one, for what\n\n### Antigravity CLI (C)\n\nGood 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.\n\nAhead on:\n- Schema \u0026 documentation, 78 against 42\n- Agent ergonomics, 78 against 73\n\nWatch for: Closed source. The repository holds the README, changelog and examples, with no source and no licence file\n\n### Prime Agent (C)\n\nGood for: Long-running research and coding work where one model drives subagents, schedules and goals from code, and where the owner can isolate the machine.\n\nAhead on:\n- Reliability, 65 against 43\n- Payments \u0026 pricing, 60 against 30\n- Maintenance \u0026 community, 79 against 68\n- Transparency \u0026 trust, 64 against 54\n\nAlso in its favour:\n- No key needed to call it\n- Free to start without a card\n- Open source\n\nWatch for: No approval prompts and no sandbox. The README says the worker and kernel processes are not a security sandbox\n\n\n## Score by category\n\n| Category | Weight | Antigravity CLI | Prime Agent | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 43 | 65 | Prime Agent +22 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 78 | 42 | Antigravity CLI +36 |\n| Agent ergonomics | 13% (16.2 this run) | 78 | 73 | Antigravity CLI +5 |\n| Security \u0026 auth | 14% (17.5 this run) | 53 | 50 | Antigravity CLI +3 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 60 | Prime Agent +30 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 68 | 79 | Prime Agent +11 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 54 | 64 | Prime Agent +10 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **57.7 · C** | **60.5 · C** | |\n\n## Facts side by side\n\n| Fact | Antigravity CLI | Prime Agent |\n| --- | --- | --- |\n| Kind | Agent harness | Agent harness |\n| Vendor | Google | Prime Intellect |\n| Hosted endpoint | no (local only) | no (local only) |\n| Transports | | |\n| Auth | OAuth or key | None |\n| Pricing | Freemium | Free |\n| x402 | no | no |\n| Licence | Proprietary. 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 Policy | MIT |\n| Read-only variant documented | no | no |\n| llms.txt | yes | no |\n| Last release | 2026-10-08 | 2026-10-07 |\n| Terms last updated | | no date given |\n| Privacy policy last updated | 2026-10-01 | no date given |\n| Customer content may train models | yes | not found in the text |\n| Terms restrict automated access | | yes |\n| Terms restrict benchmarking | | yes |\n| Terms or service can change without notice | | yes |\n| Arbitration or class-action waiver | | yes |\n| Popularity | none | 22k stars |\n\n## Verdicts\n\n**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.\n\n**Prime Agent.** Budgets for turns, tokens and time bound an autonomous run, and sessions survive a closed terminal through a supervising daemon. Model-written Python and shell commands run with the user's rights, with no approval step and no sandbox, and the Rust build on the main branch ships only as nightly betas.\n\n## Before you call either\n\n### Antigravity CLI\n\n1. Read the `status` field from `--output-format json` and read stderr too. A tool refused for lack of approval still exits 0\n2. 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\n3. 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\n4. Turn off Enable Telemetry in the Account settings before running on private repositories if Interactions should not be used for product improvement\n5. Set `--print-timeout` explicitly. The docs give a five-minute default, while `agy --help` shows 0s\n\n### Prime Agent\n\n1. Run it in a disposable clone, container or VM. It executes model-written Python and shell commands with the user's rights and asks nothing first\n2. Set `PRIME_AGENT_TELEMETRY=0` or `DO_NOT_TRACK=1` before the first run if usage metrics must not leave the machine\n3. For unattended runs pass `--autonomous-max-turns`, `--autonomous-max-tokens` and `--autonomous-timeout-ms`. Reaching a limit does not mean the task succeeded\n4. Headless use is `-p` with `--mode json` per the argument parser. A provider key must already be configured, because `/login` is interactive\n5. The `-t/--tools`, `-nt/--no-tools` and `-nbt/--no-builtin-tools` flags were removed and now fail as unknown options\n\n## Questions\n\n### Which is better for AI agents, Antigravity CLI or Prime Agent?\n\nPrime Agent scores 60.5 (C) on agent readiness against Antigravity CLI's 57.7 (C), and leads in 4 of 7 scored categories. Antigravity CLI leads on schema \u0026 documentation and agent ergonomics.\n\n### Are Antigravity CLI and Prime Agent open source?\n\nNo open-source release is listed for Antigravity CLI. Prime Agent is open source (MIT).\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/antigravity-cli-vs-prime-agent.json, and with the fewest tokens: https://www.anchorterminal.com/compare/antigravity-cli-vs-prime-agent.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"antigravity-cli\", \"b\": \"prime-agent\"}`. From a terminal: `anchor compare antigravity-cli prime-agent`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/antigravity-cli.json and https://www.anchorterminal.com/api/v1/tools/prime-agent.json\n\n## Other comparisons with Antigravity CLI or Prime Agent\n\n- [Aider vs Antigravity CLI](https://www.anchorterminal.com/compare/aider-vs-antigravity-cli.md)\n- [Aider vs Prime Agent](https://www.anchorterminal.com/compare/aider-vs-prime-agent.md)\n- [Amp vs Antigravity CLI](https://www.anchorterminal.com/compare/amp-vs-antigravity-cli.md)\n- [Amp vs Prime Agent](https://www.anchorterminal.com/compare/amp-vs-prime-agent.md)\n- [Antigravity CLI vs Claude Code](https://www.anchorterminal.com/compare/antigravity-cli-vs-claude-code.md)\n- [Antigravity CLI vs Cline](https://www.anchorterminal.com/compare/antigravity-cli-vs-cline.md)\n- [Antigravity CLI vs Cursor CLI](https://www.anchorterminal.com/compare/antigravity-cli-vs-cursor-cli.md)\n- [Antigravity CLI vs Devin](https://www.anchorterminal.com/compare/antigravity-cli-vs-devin.md)\n- [Antigravity CLI vs Droid CLI](https://www.anchorterminal.com/compare/antigravity-cli-vs-droid-cli.md)\n- [Antigravity CLI vs Pi](https://www.anchorterminal.com/compare/antigravity-cli-vs-earendil-pi.md)\n- [Antigravity CLI vs Gemini CLI](https://www.anchorterminal.com/compare/antigravity-cli-vs-gemini-cli.md)\n- [Antigravity CLI vs GitHub Copilot CLI](https://www.anchorterminal.com/compare/antigravity-cli-vs-github-copilot-cli.md)\n- [Antigravity CLI vs goose](https://www.anchorterminal.com/compare/antigravity-cli-vs-goose.md)\n- [Antigravity CLI vs Kilo Code CLI](https://www.anchorterminal.com/compare/antigravity-cli-vs-kilo-code-cli.md)\n- [Antigravity CLI vs Kiro CLI](https://www.anchorterminal.com/compare/antigravity-cli-vs-kiro-cli.md)\n- [Antigravity CLI vs OpenAI Codex](https://www.anchorterminal.com/compare/antigravity-cli-vs-openai-codex.md)\n- [Antigravity CLI vs OpenCode](https://www.anchorterminal.com/compare/antigravity-cli-vs-opencode.md)\n- [Antigravity CLI vs OpenHands](https://www.anchorterminal.com/compare/antigravity-cli-vs-openhands.md)\n- [Antigravity CLI vs Qwen Code](https://www.anchorterminal.com/compare/antigravity-cli-vs-qwen-code.md)\n- [Claude Code vs Prime Agent](https://www.anchorterminal.com/compare/claude-code-vs-prime-agent.md)\n- [Cline vs Prime Agent](https://www.anchorterminal.com/compare/cline-vs-prime-agent.md)\n- [Cursor CLI vs Prime Agent](https://www.anchorterminal.com/compare/cursor-cli-vs-prime-agent.md)\n- [Devin vs Prime Agent](https://www.anchorterminal.com/compare/devin-vs-prime-agent.md)\n- [Droid CLI vs Prime Agent](https://www.anchorterminal.com/compare/droid-cli-vs-prime-agent.md)\n- [Pi vs Prime Agent](https://www.anchorterminal.com/compare/earendil-pi-vs-prime-agent.md)\n- [Gemini CLI vs Prime Agent](https://www.anchorterminal.com/compare/gemini-cli-vs-prime-agent.md)\n- [GitHub Copilot CLI vs Prime Agent](https://www.anchorterminal.com/compare/github-copilot-cli-vs-prime-agent.md)\n- [goose vs Prime Agent](https://www.anchorterminal.com/compare/goose-vs-prime-agent.md)\n- [Kilo Code CLI vs Prime Agent](https://www.anchorterminal.com/compare/kilo-code-cli-vs-prime-agent.md)\n- [Kiro CLI vs Prime Agent](https://www.anchorterminal.com/compare/kiro-cli-vs-prime-agent.md)\n- [OpenAI Codex vs Prime Agent](https://www.anchorterminal.com/compare/openai-codex-vs-prime-agent.md)\n- [OpenCode vs Prime Agent](https://www.anchorterminal.com/compare/opencode-vs-prime-agent.md)\n- [OpenHands vs Prime Agent](https://www.anchorterminal.com/compare/openhands-vs-prime-agent.md)\n- [Prime Agent vs Qwen Code](https://www.anchorterminal.com/compare/prime-agent-vs-qwen-code.md)\n- [Antigravity CLI vs Paperclip](https://www.anchorterminal.com/compare/antigravity-cli-vs-paperclip.md)\n- [Paperclip vs Prime Agent](https://www.anchorterminal.com/compare/paperclip-vs-prime-agent.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-10", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Antigravity CLI vs Prime Agent", "url": "" } ], "description": "Prime Agent scores 60.5 (C) to Antigravity CLI's 57.7 (C) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Antigravity CLI C 57.7", "Prime Agent C 60.5", "scores" ], "h1": "Antigravity CLI vs Prime Agent", "image": "https://www.anchorterminal.com/assets/og/compare-antigravity-cli-vs-prime-agent.png", "path": "/compare/antigravity-cli-vs-prime-agent", "published": "2026-10-01", "section": "tools", "title": "Antigravity CLI vs Prime Agent for AI agents (2026) | Anchor Terminal", "toc": null, "updated": "2026-10-10", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-prime-agent" }, "tokens": { "markdown": 2800, "slim": 680 }, "version": 1 }