Head to head · Agent harnesses · October 2026 research run

Kilo Code CLI vs Muse Code

Kilo Code CLI scores 75.4 (BB) on agent readiness against Muse Code's 61.3 (C), and leads in 5 of 7 scored categories. Muse Code leads on agent ergonomics. Both do agent harnesses.

Best agent harnesses and coding agents · All 226 harnesses comparisons

Which one, for what

Kilo Code CLI BB

Best 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 45
  • Schema & documentation, 90 against 84
  • Payments & pricing, 50 against 20
  • Maintenance & community, 87 against 75
  • Transparency & trust, 76 against 57

Also in its favour

  • Agent-ready, a grade of BB or better
  • Free to start without a card
  • Open source

Watch for

Telemetry to PostHog is on by default, and the privacy policy and PRIVACY.md don't mention it

Muse Code C

Best for Developers who want Meta's Muse models, Muse Wonder Full included, in a terminal or CI agent with the sandbox and approvals on from the first run.

Ahead on

  • Agent ergonomics, 79 against 72

Watch for

Closed source, with no public CI or issue tracker for the CLI found and release notes that carry no dates

Score by category

CategoryWeight this runKilo Code CLIMuse CodeEdge
Reliability16%208545Kilo Code CLI +40
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.29084Kilo Code CLI +6
Agent ergonomics13%16.27279Muse Code +7
Security & auth14%17.56667Muse Code +1
Payments & pricing10%12.55020Kilo Code CLI +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88775Kilo Code CLI +12
Transparency & trust7%8.87657Kilo Code CLI +19
Negative events≤1500
TotalBB 75.4/100C 61.3/100

Facts side by side

FactKilo Code CLIMuse Code
KindAgent harnessAgent harness
VendorKilo Code Inc.Meta
Hosted endpointno (local only)no (local only)
Transports
AuthOAuth or keyOAuth or key
PricingFreemiumPaid
x402nono
LicenceMITProprietary binary, used under the Meta Model API Terms of Service, which cover Meta's coding harness. Subscriptions are also under the Meta Subscription Terms of Service. The TypeScript and Python SDKs in the linked repository are MIT.
Read-only variant documentednoyes
llms.txtyesyes
Last release2026-10-072026-10-11
Terms last updated2026-09-30
Privacy policy last updated2026-05-29couldn't be read
Customer content may train modelsnot found in the text
Terms restrict automated accessyes
Terms restrict benchmarkingnot found in the text
Terms or service can change without noticeyes
Arbitration or class-action waiveryes
Popularity28k stars, 33k npm/wk63k npm/wk

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.

Muse Code

Muse Code runs with approvals and an OS sandbox on by default, per-host network approval, an append-only event log and a headless mode with documented exit codes. It is the only route to Muse Wonder Full. It is closed source with undated release notes and no free route, and subscriptions allow training on code unless Contributor mode is turned off.

Before you call either

Kilo Code CLI

  1. Set sandbox.enabled to true in the global kilo.jsonc before kilo run --auto. --auto approves every permission request not explicitly denied
  2. Set experimental.openTelemetry to false, or KILO_TELEMETRY_LEVEL to a value other than all, to stop telemetry
  3. Add needed hosts to sandbox.allowed_hosts in global config. MCP tool calls are unavailable while network restriction is on
  4. Without --auto a non-interactive run rejects every permission prompt and exits 1
  5. Put provider keys in global config or the environment. {env:VAR} in a project kilo.json is ignored

Muse Code

  1. Set META_API_KEY for headless runs. Browser sign-in isn't available in CI or for Meta Managed Accounts
  2. Gate on your own test command, not the exit code. muse exec returns 0 when the turn completes even if tests still fail
  3. Pass --max-model-steps on unattended runs so a stuck task can't loop
  4. Prefer --disable-approval to --yolo in CI so the sandbox stays on. On Linux the runner needs a working bubblewrap and a non-musl build
  5. Turn Contributor mode off in /settings before a subscription session touches private code

Questions

Which is better for AI agents, Kilo Code CLI or Muse Code?

Kilo Code CLI scores 75.4 (BB) on agent readiness against Muse Code's 61.3 (C), and leads in 5 of 7 scored categories. Muse Code leads on agent ergonomics.

Are Kilo Code CLI and Muse Code open source?

Kilo Code CLI is open source (MIT). No open-source release is listed for Muse Code.

Other comparisons with Kilo Code CLI or Muse Code

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