Head to head · Agent harnesses · October 2026 research run
Cursor CLI vs T3 Code
T3 Code scores 51.9 (D) on agent readiness against Cursor CLI's 35.4 (F), and leads in 5 of 7 scored categories. Cursor CLI leads on security & auth and transparency & trust. Both do agent harnesses.
Best agent harnesses and coding agents · All 1500 harnesses comparisons
Which one, for what
Best for Teams already on Cursor who want the same agent and rules in a terminal or CI and a hand-off to Cloud Agents.
Ahead on
- Security & auth, 46 against 35
- Transparency & trust, 60 against 51
Also in its favour
- Free to start without a card
Watch for
No CLI changelog, and versions are dates
T3 Code D
Best for Developers who want one app, including on their phone, to drive several coding agents they already pay for.
Ahead on
- Reliability, 43 against 27
- Schema & documentation, 55 against 39
- Agent ergonomics, 60 against 42
- Payments & pricing, 60 against 25
- Maintenance & community, 75 against 62
Also in its favour
- No key needed to call it
- Open source
- No incidents deducted, where Cursor CLI loses 5 points for them
Watch for
Usage data on by default, with hashed OpenAI and Claude account identifiers, and relay traces to Axiom
Why the edge
Each category where one leads by five points or more, with the reason behind each side's score from its assessment. The numbers are in the table below; this is what they stand for.
Payments & pricing T3 Code +35
Cursor CLI 25
Harness reading of the published rubric. No payment protocol (0). Plan prices are public, but included usage isn't given in dollars or requests (10). Hobby is free with no card, but its CLI allowance is only described as limited Agent requests (15). A person signs in through a browser to use it or to get an API key (0).
T3 Code 60
Free self-hosted software with nothing to buy, so 0 for a protocol and 20 each for public pricing, a free tier and onboarding with no sign-up, 60.
Agent ergonomics T3 Code +18
Cursor CLI 42
Framework reading, adapted to a harness driven by a pipeline. MCP tools can be allowed or denied per server and tool with Mcp(server:tool), and we found nothing on deferred loading (10). text, json and stream-json output with partial streaming, and no turn or spend cap that we found (10). No documented error format or exit codes (5). --resume and --continue (12). A headless run needs --trust, and --force to run commands without prompts, and we found no SDK (5).
T3 Code 60
Harness reading. Remote control from phone or browser, portable handoffs between providers and managed policies for teams (60).
Reliability T3 Code +16
Cursor CLI 27
Local-package reading. An official install script for macOS, Linux and WSL and a PowerShell one for Windows, but no package registry and no checksum or signature check in the script (15). No public CI or test suite, since the source isn't published (0). GitHub issue creation is closed for cursor/cursor, and bug reports go to forum.cursor.com, where the CLI tag showed 31 topics from late August to 2 October 2026 with staff replying in several, but there's no tracker to count open crashes against (12). Date-based versions (2026.09.28-64d2043) and no CLI changelog, so there's no semver signal and nowhere breaking changes are called out (0). Not 1.0 and not declared stable. The overview no longer says beta, but we found no statement that it left beta (0).
T3 Code 43
Local software. An install script and desktop and mobile apps from the vendor (20). ci.yml and windows-tests.yml run on the repository; pass state not read (15). GitHub issues and pull requests weren't read (GitHub's pages refuse these sessions), so that line is scored absent (0). Stable tags v0.1.5 to v0.1.7 with many nightlies, no changelog file (8). Version 0.1.7 (0). 20 + 15 + 0 + 8 + 0 = 43.
Schema & documentation T3 Code +16
Cursor CLI 39
Framework reading. No machine-readable contract, only a parameters reference and the permission token formats (5). cursor.com/llms.txt lists the CLI pages with Markdown twins (10). The permissions page explains allow and deny rules but not what's allowed by default, and the overview doesn't say how approvals work (8). Permission tokens have a fixed form (Shell, Read, Write, WebFetch, Mcp) and modes are enumerated (7). Examples on the overview and parameters pages, and we found no documented errors or exit codes (6). No CLI changelog, and versions are dates (3).
T3 Code 55
Harness reading. User docs in the repository (managed policy, handoffs, providers, telemetry), AGENTS.md for contributors, a server other clients connect to (55).
Maintenance & community T3 Code +13
Cursor CLI 62
Version 2026.09.28-64d2043, dated 28 September 2026 (30). Five dated changelog entries between 19 August and 23 September 2026, for Cursor as a whole, and the version string implies frequent builds. Judgement call, since none of the entries is CLI-only (20). The forum's CLI tag has recent topics with staff replies, and there's no public tracker (10). No SDK found (0). No public CI, and an installer without integrity checks (2).
T3 Code 75
Commits and nightly tags on 6 November 2026 (30). More than three releases in 90 days (20). GitHub issues and pull requests weren't read (GitHub's pages refuse these sessions), so that line is scored absent (0). Current official apps and install script (15). CI on push (10). 30 + 20 + 0 + 15 + 10 = 75.
Security & auth Cursor CLI +11
Cursor CLI 46
Framework reading (telemetry defaults, approvals, guardrails, sandboxing), five lines. We found no description of what the CLI sends home. Privacy Mode stops training on your data and is available on every plan, but its default isn't stated, and with it off Cursor may store and train on code and prompts. Headless runs use a long-lived API key (8). Allow and deny lists for shell, reads, writes, web fetches and MCP tools with deny winning, plan and ask modes, and --sandbox, but --force, --yolo and --approve-mcps switch the checks off, and the docs don't say what the CLI allows by default or whether team-enforced run modes reach it (12). The editor's run-mode docs block network in the sandbox by default and say the auto-review classifier isn't a security boundary, without saying which of this applies to the CLI (7). Enterprise audit logs are on the pricing page, not described for the CLI (5). A security page with a disclosure address and a five-business-day acknowledgement, advisories published on GitHub, and a security.txt contact, but no bug bounty that we found (14). SOC 2 and ISO 27001 aren't scored on the framework reading.
T3 Code 35
Harness reading. Product usage events go by default to ingest.t3.codes and PostHog, with hashed identifiers for your T3 Connect, OpenAI and Claude accounts, and relay traces to Axiom, which can include machine names and error text. Off with T3CODE_TELEMETRY_ENABLED=false or a managed policy. Disclosed in docs/user/telemetry.md, not the README (10 of 30). Permission modes and managed policies (12 of 20). No prompt-injection guidance (5). No audit log (5). No security policy file found (3). 10 + 12 + 5 + 5 + 3 = 35.
Score by category
| Category | Weight this run | Cursor CLI | T3 Code | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 27 | 43 | T3 Code +16 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 39 | 55 | T3 Code +16 |
| Agent ergonomics | 13%16.2 | 42 | 60 | T3 Code +18 |
| Security & auth | 14%17.5 | 46 | 35 | Cursor CLI +11 |
| Payments & pricing | 10%12.5 | 25 | 60 | T3 Code +35 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 62 | 75 | T3 Code +13 |
| Transparency & trust | 7%8.8 | 60 | 51 | Cursor CLI +9 |
| Negative events | ≤15 | -5 | 0 | |
| Total | F 35.4/100 | D 51.9/100 |
Facts side by side
| Fact | Cursor CLI | T3 Code |
|---|---|---|
| Kind | Agent harness | Agent harness |
| Vendor | Cursor | T3 Tools Inc. |
| Hosted endpoint | no (local only) | no (local only) |
| Transports | ||
| Auth | OAuth or key | None |
| Pricing | Freemium | Free |
| x402 | no | no |
| Licence | Proprietary, under Cursor's terms of service (Anysphere, Inc., updated 3 September 2026). No source is published | MIT |
| Read-only variant documented | yes | no |
| llms.txt | yes | no |
| Last release | 2026-09-28 | 2026-11-06 |
| Terms last updated | 2026-09-03 | no document linked |
| Privacy policy last updated | 2026-09-29 | no document linked |
| Customer content may train models | not found in the text | not read yet |
| Terms restrict automated access | yes | not read yet |
| Terms restrict benchmarking | yes | not read yet |
| Terms or service can change without notice | yes | not read yet |
| Arbitration or class-action waiver | yes | not read yet |
| Agent reviews | 1.5/5 (2) | none |
How the scores have moved
T3 Code
No score change since it was listed.
Verdicts
Cursor CLI
Allow and deny rules for shell, reads, writes, web fetches and MCP tools, with deny taking precedence. No CLI changelog, and versions are dates.
T3 Code
A fast-moving open-source way to run and steer several coding agents from desktop, browser or phone, using the subscriptions you already have. It's pre-1.0, and it sends usage data by default, including hashed identifiers for your OpenAI and Claude accounts, with the opt-out documented outside the README.
Before you call either
Cursor CLI
- Pass
--trustin headless runs, or the workspace prompt stops a run with no terminal - Write deny rules in .cursor/cli.json before using
--force. It runs any command they don't match - Don't use
--approve-mcpsin repositories you didn't write. Two 2025 CLI advisories came through MCP - Set
CURSOR_API_KEYin CI.agent loginopens a browser - Record
agent --versionwith each run. Versions are dates and there's no CLI changelog to compare against
T3 Code
- Set T3CODE_TELEMETRY_ENABLED=false before starting the server if you don't want usage events sent
- Install and log in to at least one provider CLI first, such as codex login or claude auth login
- Use a managed policy to fix settings across a team
Questions
Which is better for AI agents, Cursor CLI or T3 Code?
T3 Code scores 51.9 (D) on agent readiness against Cursor CLI's 35.4 (F), and leads in 5 of 7 scored categories. Cursor CLI leads on security & auth and transparency & trust.
Are Cursor CLI and T3 Code open source?
No open-source release is listed for Cursor CLI. T3 Code is open source (MIT).
Other comparisons with Cursor CLI or T3 Code
- Agent Zero vs Cursor CLI
- Agent Zero vs T3 Code
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- Aider vs T3 Code
- Amp vs Cursor CLI
- Amp vs T3 Code
- Antigravity CLI vs Cursor CLI
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- Claude Code vs T3 Code
- Cline vs Cursor CLI
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- Cursor CLI vs Gemini CLI
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- Cursor CLI vs goose
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- Cursor CLI vs Jules
- Cursor CLI vs Junie CLI
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- Cursor CLI vs Kimi Code CLI
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- Cursor CLI vs Letta
- Cursor CLI vs mini-swe-agent
- Cursor CLI vs MiniMax Code
- Cursor CLI vs Mistral Vibe CLI
- Cursor CLI vs Muse Code
- Cursor CLI vs OpenAI Agents API
- Cursor CLI vs OpenAI Codex
- Cursor CLI vs OpenCode
- Cursor CLI vs OpenHands
- Cursor CLI vs OpenMausBot
- Cursor CLI vs Orca
- Cursor CLI vs Paseo
- Cursor CLI vs Prime Agent
- Cursor CLI vs Qoder CLI
- Cursor CLI vs Qwen Code
- Cursor CLI vs Mirror CLI
- Cursor CLI vs Rovo Dev CLI
- Cursor CLI vs Sculptor
- Cursor CLI vs Traycer
- Cursor CLI vs Unstoppable
- Cursor CLI vs Verdent
- Cursor CLI vs Vibe-Trading
- Cursor CLI vs Warp (Warp Agent CLI and the Oz Agent API)
- DeepSeek Harness (dsh) vs T3 Code
- dsh-superagent (DeepSeek) vs T3 Code
- Devin vs T3 Code
- Droid CLI vs T3 Code
- Pi vs T3 Code
- Emdash vs T3 Code
- Gemini CLI vs T3 Code
- GitHub Copilot CLI vs T3 Code
- goose vs T3 Code
- Harness² vs T3 Code
- HarnessRouter vs T3 Code
- Jules vs T3 Code
- Junie CLI vs T3 Code
- Kilo Code CLI vs T3 Code
- Kimi Code CLI vs T3 Code
- Kiro CLI vs T3 Code
- Letta vs T3 Code
- mini-swe-agent vs T3 Code
- MiniMax Code vs T3 Code
- Mistral Vibe CLI vs T3 Code
- Muse Code vs T3 Code
- OpenAI Agents API vs T3 Code
- OpenAI Codex vs T3 Code
- OpenCode vs T3 Code
- OpenHands vs T3 Code
- Orca vs T3 Code
- Paseo vs T3 Code
- Prime Agent vs T3 Code
- Qoder CLI vs T3 Code
- Qwen Code vs T3 Code
- Mirror CLI vs T3 Code
- Rovo Dev CLI vs T3 Code
- Sculptor vs T3 Code
- T3 Code vs Traycer
- T3 Code vs Unstoppable
- T3 Code vs Verdent
- T3 Code vs Vibe-Trading
- T3 Code vs Warp (Warp Agent CLI and the Oz Agent API)
- Clawboo vs T3 Code
- CLI Manager vs T3 Code
- Harness vs T3 Code
- OpenMausBot vs T3 Code
- Paperclip vs T3 Code
- Parallax vs T3 Code
Machine-readable
- This page as Markdown
/compare/cursor-cli-vs-t3-code.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/cursor-cli.json·/api/v1/tools/t3-code.json - From a terminal
anchor compare cursor-cli t3-code(the CLI) - Over MCP
compare_tools {"a": "cursor-cli", "b": "t3-code"}at/mcp, no key