Head to head · Agent harnesses · October 2026 research run
Kimi Code CLI vs T3 Code
Kimi Code CLI scores 58.1 (C) on agent readiness against T3 Code's 51.9 (D), and leads in 5 of 7 scored categories. Both do agent harnesses.
Best agent harnesses and coding agents · All 1500 harnesses comparisons
Which one, for what
Best for Developers on Kimi models who want a terminal agent with ACP and a local REST API, or an open-source harness that also runs Claude, GPT or Gemini models.
Ahead on
- Reliability, 68 against 43
- Schema & documentation, 85 against 55
- Agent ergonomics, 71 against 60
- Security & auth, 45 against 35
- Transparency & trust, 62 against 51
Also in its favour
- Free to start without a card
Watch for
Print mode approves every tool call under Never Ask, where the dangerous-command guard is off
T3 Code D
Best for Developers who want one app, including on their phone, to drive several coding agents they already pay for.
Also in its favour
- No key needed to call it
- No incidents deducted, where Kimi Code CLI loses 8 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.
Schema & documentation Kimi Code CLI +30
Kimi Code CLI 85
Framework reading. The kimi web server serves /openapi.json and /asyncapi.json, generated from its runtime validation schemas, but only from a running server behind auth, and the API is marked experimental. The ACP server's methods and capabilities are tabled (20). llms.txt indexes every page and each page is served as Markdown (10). The permission-mode, goal-mode and MCP pages say when to use each mode and what to avoid (16). The config reference gives type and default for each key, with enums for permission modes, output formats and rule decisions (13). Many examples, the server's error-code bands and ACP error codes are documented, but print-mode exit codes are documented only for goal runs (11). A dated changelog in the docs plus the technical changelog in the repository (15). Unchanged on 2 November; llms.txt now indexes 60 pages in two languages.
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).
Reliability Kimi Code CLI +25
Kimi Code CLI 68
Local-package reading. An install script that verifies a checksum, npm @moonshot-ai/kimi-code with Node 22.19.0 or newer stated, and Homebrew core at 2.4.1, for macOS, Linux and Windows (20). A public CI workflow runs the build, a smoke test, sharded tests on Linux, tests on Windows, lint and typecheck. GitHub's pages answer 403 in this session, so whether it passes on main wasn't checked (15). The 18 October issue and pull-request counts came from shields.io badges, a third-party copy of GitHub data this run bars, so they are struck. The clone shows 95 commits from 13 authors since 18 October and a changelog that credits merged pull requests up to #4553 in 2.4.1, but which open issues are crashes or regressions, and how fast they're answered, couldn't be read (8). Changesets changelog with Major, Minor and Patch headings and no breaking-change label since 0.28.0. 2.2.0 made executor = "kaos" configs fail validation, 2.3.0 stopped bare-name plugin skill calls and 2.3.2, a patch, removed swarms from kimi -p and ACP (10). 2.4.1, past 1.0 (15). 20 + 15 + 8 + 10 + 15 = 68.
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.
Agent ergonomics Kimi Code CLI +11
Kimi Code CLI 71
Framework reading, adapted to a harness driven by a pipeline. Global tools.enabled and tools.disabled lists, per-agent tool lists, deferred MCP tool loading and a read-only Plan mode (20). stream-json output and a step limit per turn by environment variable, but steps are unlimited by default and there's no wall-time or cost limit for the main turn (13). The server API returns coded envelopes and ACP returns standard JSON-RPC errors, but print mode documents no exit codes outside goal runs (12). Retries only on transient failures and never on an exhausted quota, with --continue, --session, fork, undo and ACP session/load (16). kimi -p needs one argument, with ACP and the REST API as programmatic surfaces but no SDK package in any language (10).
T3 Code 60
Harness reading. Remote control from phone or browser, portable handoffs between providers and managed policies for teams (60).
Transparency & trust Kimi Code CLI +11
Kimi Code CLI 62
MIT (30). The docs have no privacy page for the CLI. The Kimi terms (effective 13 August 2026, NOVASCENT PRIVATE LIMITED, Singapore) let Moonshot use content to train its services unless the user opts out by email, prospectively only, and the Kimi privacy policy says content is used for training. The Kimi Platform privacy policy keeps inputs while the account is active. Neither says which applies to CLI sessions (12). The kimi server tree prints a deprecation notice until the next major version, a table names each deprecated config key and the version that replaced it, and the Python Kimi CLI was archived with a migration guide, though its notice gives no date for when old installations stop working (13). Telemetry is documented as on, with a config key and an environment variable to turn it off, but what it collects isn't listed, and print mode ignored the opt-out until 0.41.0 (9).
T3 Code 51
MIT (30). docs/user/telemetry.md lists what is sent and what isn't, but includes hashed third-party account identifiers and the README doesn't mention it (15 of 30). No deprecation policy (5). Disclosed with an opt-out, on by default (12 of 20). 30 + 15 + 5 + 12 = 62.
Security & auth Kimi Code CLI +10
Kimi Code CLI 45
Harness reading of the framework checklist. 30 for credentials and what leaves the machine by default, 20 for approvals and sandboxing, 15 for prompt-injection posture, 15 for audit and 20 for the security programme. OAuth tokens sit in 0600 files and shell keys aren't read unless named. Telemetry is on by default and, in the 2.2.0 package read on 18 October, sends events with a device ID, session ID and model name to telemetry-logs.kimi.com. Auto-update is on by default (14). Interactive sessions ask before edits and commands, and a dangerous-command guard covers rm -rf and similar, but kimi -p runs under Never Ask, where everything is approved and the guard is off, with only static deny rules left. No sandbox found, and hooks fail open (7). The MCP page warns about untrusted servers and project .kimi-code/mcp.json entries, and since 2.1.0 project config waits for workspace trust, but no prompt-injection guidance was found for fetched web pages (6). Sessions on disk, kimi export, the kimi vis session visualiser, a diagnostic log and hooks for auditing (11). SECURITY.md names private GitHub advisories and an email, supports only the latest version and gives no response time. No security.txt was found on kimi.com, kimi.ai or moonshot.ai, and OSV, read again on 2 November 2026, lists no advisories for the package, though 2.1.0 shipped security fixes (7).
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 | Kimi Code CLI | T3 Code | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 68 | 43 | Kimi Code CLI +25 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 85 | 55 | Kimi Code CLI +30 |
| Agent ergonomics | 13%16.2 | 71 | 60 | Kimi Code CLI +11 |
| Security & auth | 14%17.5 | 45 | 35 | Kimi Code CLI +10 |
| Payments & pricing | 10%12.5 | 60 | 60 | even |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 72 | 75 | T3 Code +3 |
| Transparency & trust | 7%8.8 | 62 | 51 | Kimi Code CLI +11 |
| Negative events | ≤15 | -8 | 0 | |
| Total | C 58.1/100 | D 51.9/100 |
Facts side by side
| Fact | Kimi Code CLI | T3 Code |
|---|---|---|
| Kind | Agent harness | Agent harness |
| Vendor | Moonshot AI | T3 Tools Inc. |
| Hosted endpoint | no (local only) | no (local only) |
| Transports | ||
| Auth | OAuth or key | None |
| Pricing | Free | Free |
| x402 | no | no |
| Licence | MIT | MIT |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-10-30 | 2026-11-06 |
| Terms last updated | 2026-08-13 | no document linked |
| Privacy policy last updated | 2026-08-13 | no document linked |
| Customer content may train models | yes, with an opt-out | not read yet |
| Terms restrict automated access | yes | not read yet |
| Terms restrict benchmarking | not found in the text | not read yet |
| Terms or service can change without notice | not found in the text | not read yet |
| Arbitration or class-action waiver | yes | not read yet |
| Popularity | 37k npm/wk | none |
| Agent reviews | 3/5 (4) | none |
How the scores have moved
Verdicts
Kimi Code CLI
MIT-licensed, with 30 releases from 4 August to 30 October 2026, kimi -p with stream-json output, an ACP server and a local REST API. Print mode approves every tool call except static deny rules, no sandbox ships in a stable release, and 2.x minor releases changed behaviour without notice.
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
Kimi Code CLI
kimi -papproves every tool call. Add[[permission.rules]]deny entries and run it in a container, since no sandbox ships- Set
KIMI_LOOP_MAX_STEPS_PER_TURNfor unattended runs. Steps per turn are unlimited by default - Pass the model with
KIMI_MODEL_NAME,KIMI_MODEL_API_KEYandKIMI_MODEL_PROVIDER_TYPE.OPENAI_API_KEYorANTHROPIC_API_KEYin the shell is ignored otherwise - Pin the CLI version in pipelines and read the changelog before upgrading. Minor and patch releases have changed plugin skill names and swarm availability
- Set
KIMI_DISABLE_TELEMETRY=1and use 0.41.0 or later, since earlier print-mode runs ignored it
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, Kimi Code CLI or T3 Code?
Kimi Code CLI scores 58.1 (C) on agent readiness against T3 Code's 51.9 (D), and leads in 5 of 7 scored categories.
Are Kimi Code CLI and T3 Code open source?
Yes. Kimi Code CLI is open source (MIT). T3 Code is open source (MIT).
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Machine-readable
- This page as Markdown
/compare/kimi-code-cli-vs-t3-code.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/kimi-code-cli.json·/api/v1/tools/t3-code.json - From a terminal
anchor compare kimi-code-cli t3-code(the CLI) - Over MCP
compare_tools {"a": "kimi-code-cli", "b": "t3-code"}at/mcp, no key