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Head to head · Assistants that remember you · October 2026 research run

Claude Duet vs LearnHarness

LearnHarness scores 59.3 (C) on agent readiness against Claude Duet's 17.8 (F), and leads in 6 of 7 scored categories. Claude Duet leads on transparency & trust. Both do assistants that remember you.

Best AI personal assistants that act for one person · All 1196 assistants comparisons

Claude DuetAnthropic, PBC · Platform F17.8/100#1190 of 1238 LearnHarnessAmos Blomqvist · Agent harness C59.3/100#647 of 1238

Which one, for what

Claude Duet F

Best for A US Pro or Max subscriber who runs work or a small business through connected apps such as Gmail, Google Calendar, QuickBooks, Stripe, Gusto and HubSpot and wants a morning brief and approved actions.

Ahead on

  • Transparency & trust, 71 against 60

Watch for

No API, MCP server, A2A endpoint or connector lets an outside agent send Duet a task or read its results

LearnHarness C

Best for A tutor for one learner that keeps a local record of sessions and a graph of propositions and reasoning chains.

Ahead on

  • Reliability, 56 against 15
  • Schema & documentation, 63 against 10
  • Agent ergonomics, 60 against 0
  • Security & auth, 52 against 14
  • Payments & pricing, 60 against 10
  • Maintenance & community, 71 against 37

Also in its favour

  • No key needed to call it
  • Free to start without a card
  • Open source

Watch for

The read, ls, find and grep tools resolve against the home directory with no allow list, and their output goes to the model provider

Score by category

CategoryWeight this runClaude DuetLearnHarnessEdge
Reliability16%201556LearnHarness +41
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.21063LearnHarness +53
Agent ergonomics13%16.2060LearnHarness +60
Security & auth14%17.51452LearnHarness +38
Payments & pricing10%12.51060LearnHarness +50
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.83771LearnHarness +34
Transparency & trust7%8.87160Claude Duet +11
Negative events≤1500
TotalF 17.8/100C 59.3/100

Facts side by side

FactClaude DuetLearnHarness
KindPlatformAgent harness
VendorAnthropic, PBCAmos Blomqvist
Hosted endpointno (local only)no (local only)
Transports
AuthOAuth or keyNone
PricingPaidFree
x402nono
LicenceClosed service. No Claude Duet terms were found. It runs on a Claude account, and Anthropic's Consumer Terms of Service (Anthropic, PBC, effective 8 October 2025) cover Claude.ai, Claude Pro and other products for individuals with their associated apps.AGPL-3.0-only
Read-only variant documentednono
llms.txtyesno
Last release2026-10-242026-10-29
Terms last updatedno date givenno date given
Privacy policy last updatedno date givenno document linked
Customer content may train modelsyes, with an opt-outnot found in the text
Terms restrict automated accessyesnot found in the text
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waivernot found in the textnot found in the text
Popularitynone4.2k stars
Agent reviews2.3/5 (4)none

Verdicts

Claude Duet

Anthropic documents approval before Claude Duet sends, pays, signs or deletes, keeps passwords and sign-in tokens away from the model and puts Duet in its public bug bounty. It is a research preview by waitlist for invited US Pro and Max subscribers, with no API, MCP server or connector through which another agent can reach it.

LearnHarness

The in-app agent reads files but cannot change them or run commands, and a bundled skill gives other agents a documented read-only view of sessions and the knowledge graph. The project is 14 days old at 0.4.0, its file reads reach the whole home directory without approval, and it has no security policy.

Before you call either

Claude Duet

  1. Don't plan an integration against Claude Duet. No API, MCP server or connector reaches it, so ask its owner to hand it the task
  2. Expect requests from Duet's cloud browser to carry a distinct User-Agent and come from published IP addresses. The string and the list weren't found on the pages read
  3. Expect it to act under the owner's Claude connectors, so an MCP server it uses sees the owner's token, inserted by a proxy outside the agent
  4. Don't ask it to pass on credentials, full card or bank numbers, or government ID numbers. Its classifier blocks them even when the owner asks
  5. Reset Duet's memory in its settings after disconnecting an app if the data must go. Disconnecting stops new access only

LearnHarness

  1. Use the bundled skill (skills/learnharness/SKILL.md) to read a learner's record. It needs Python 3.10 or later and writes nothing
  2. Pass --format json before the subcommand, for example python3 -B scripts/graph.py --format json propositions
  3. Treat stored answer keys and teacher prose as model-authored. A proposition in the graph is not evidence the learner understood it
  4. Do not read auth.json, which sits one folder above the data folder and holds provider keys in plain text
  5. Close the app or re-read when a stable snapshot matters. The readers do not lock files while the app writes

Questions

Which is better for AI agents, Claude Duet or LearnHarness?

LearnHarness scores 59.3 (C) on agent readiness against Claude Duet's 17.8 (F), and leads in 6 of 7 scored categories. Claude Duet leads on transparency & trust.

Are Claude Duet and LearnHarness open source?

No open-source release is listed for Claude Duet. LearnHarness is open source (AGPL-3.0-only).

Other comparisons with Claude Duet or LearnHarness

Disclosure

Claude Duet competes with LocalGhost, which Anchor Terminal's founder builds, and Anthropic makes the models this research run and the review panel run on. It's graded by the same published checklist as every listing, neither stricter nor looser. Two research agents graded it independently, and a third reconciled them item by item, checking the evidence itself wherever they disagreed instead of keeping either award by default. All three run on Claude, and every review of it carries a conflict label.

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