Head to head · Agent harness · October 2026 research run
Kilo Code CLI vs Prime Agent
Kilo Code CLI scores 75.4 (BB) on agent readiness against Prime Agent's 60.5 (C), and leads in 5 of 7 scored categories. Prime Agent leads on payments & pricing. Both do agent harness.
Which one, for what
Good for Developers who want an open-source terminal agent with per-tool permission rules, an optional sandbox and a choice of provider, and the same engine in VS Code and JetBrains.
Ahead on
- Reliability, 85 against 65
- Schema & documentation, 90 against 42
- Security & auth, 66 against 50
- Maintenance & community, 87 against 79
- Transparency & trust, 76 against 64
Also in its favour
- Agent-ready, a grade of BB or better
Watch for
Telemetry to PostHog is on by default, and the privacy policy and PRIVACY.md don't mention it
Good 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.
Ahead on
- Payments & pricing, 60 against 50
Also in its favour
- No key needed to call it
Watch for
No approval prompts and no sandbox. The README says the worker and kernel processes are not a security sandbox
Score by category
| Category | Weight this run | Kilo Code CLI | Prime Agent | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 85 | 65 | Kilo Code CLI +20 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 90 | 42 | Kilo Code CLI +48 |
| Agent ergonomics | 13%16.2 | 72 | 73 | Prime Agent +1 |
| Security & auth | 14%17.5 | 66 | 50 | Kilo Code CLI +16 |
| Payments & pricing | 10%12.5 | 50 | 60 | Prime Agent +10 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 87 | 79 | Kilo Code CLI +8 |
| Transparency & trust | 7%8.8 | 76 | 64 | Kilo Code CLI +12 |
| Negative events | ≤15 | 0 | 0 | |
| Total | 75.4 · BB | 60.5 · C |
Facts side by side
| Fact | Kilo Code CLI | Prime Agent |
|---|---|---|
| Kind | Agent harness | Agent harness |
| Vendor | Kilo Code Inc. | Prime Intellect |
| Hosted endpoint | no (local only) | no (local only) |
| Transports | ||
| Auth | OAuth or key | None |
| Pricing | Freemium | Free |
| x402 | no | no |
| Licence | MIT | MIT |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-10-07 | 2026-10-07 |
| Terms last updated | 2026-09-30 | no date given |
| Privacy policy last updated | 2026-05-29 | no date given |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | yes | yes |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | yes | yes |
| Arbitration or class-action waiver | yes | yes |
| Popularity | 28k stars, 33k npm/wk | 22k stars |
Verdicts
Kilo Code CLI
Shell commands ask before running by default, and an optional operating-system sandbox blocks writes outside the workspace and outbound network. Telemetry to PostHog is on by default and the sandbox is off, so an unattended kilo run --auto approves everything not denied unless both are configured first.
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.
Before you call either
Kilo Code CLI
- Set
sandbox.enabledto true in the globalkilo.jsoncbeforekilo run --auto.--autoapproves every permission request not explicitly denied - Set
experimental.openTelemetryto false, orKILO_TELEMETRY_LEVELto a value other thanall, to stop telemetry - Add needed hosts to
sandbox.allowed_hostsin global config. MCP tool calls are unavailable while network restriction is on - Without
--autoa non-interactive run rejects every permission prompt and exits 1 - Put provider keys in global config or the environment.
{env:VAR}in a projectkilo.jsonis ignored
Prime Agent
- 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=0orDO_NOT_TRACK=1before the first run if usage metrics must not leave the machine - For unattended runs pass
--autonomous-max-turns,--autonomous-max-tokensand--autonomous-timeout-ms. Reaching a limit does not mean the task succeeded - Headless use is
-pwith--mode jsonper the argument parser. A provider key must already be configured, because/loginis interactive - The
-t/--tools,-nt/--no-toolsand-nbt/--no-builtin-toolsflags were removed and now fail as unknown options
Questions
Which is better for AI agents, Kilo Code CLI or Prime Agent?
Kilo Code CLI scores 75.4 (BB) on agent readiness against Prime Agent's 60.5 (C), and leads in 5 of 7 scored categories. Prime Agent leads on payments & pricing.
Are Kilo Code CLI and Prime Agent open source?
Yes. Kilo Code CLI is open source (MIT). Prime Agent is open source (MIT).
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Machine-readable
- This page as Markdown
/compare/kilo-code-cli-vs-prime-agent.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/kilo-code-cli.json·/api/v1/tools/prime-agent.json - From a terminal
anchor compare kilo-code-cli prime-agent(the CLI) - Over MCP
compare_tools {"a": "kilo-code-cli", "b": "prime-agent"}at/mcp, no key