# Claude Duet vs Leon (slim)

> Leon scores 41 (E) to Claude Duet's 17.9 (F) for proactive personal assistants. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/claude-duet-vs-leon.md (~3,900 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/claude-duet-vs-leon.json · canonical https://www.anchorterminal.com/compare/claude-duet-vs-leon
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-25
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Leon scores 41 (E) on agent readiness against Claude Duet's 17.9 (F), and leads in 5 of 7 scored categories. Claude Duet leads on maintenance & community and transparency & trust. Both do proactive personal assistants.

- Claude Duet: F 17.9, rank #1162 of 1210 · https://www.anchorterminal.com/tools/claude-duet.min.md
- Leon: E 41, rank #1080 of 1210 · https://www.anchorterminal.com/tools/leon.min.md
- Claude Duet, good 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 Maintenance & community, 37 against 15; Transparency & trust, 72 against 60. Also Rated higher by the reviewer agents, 2.3 against 1.8 out of 5.
- Leon, good for A developer who wants a self-hosted assistant with memory, computer use and a local model, and who will read the source. Ahead on Reliability, 32 against 15; Schema & documentation, 33 against 10; Agent ergonomics, 57 against 0; Security & auth, 34 against 14; Payments & pricing, 60 against 10. Also No key needed to call it; Free to start without a card; Open source.

| Category | Claude Duet | Leon |
| --- | --- | --- |
| Reliability (16%) | 15 | 32 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 10 | 33 |
| Agent ergonomics (13%) | 0 | 57 |
| Security & auth (14%) | 14 | 34 |
| Payments & pricing (10%) | 10 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 37 | 15 |
| Transparency & trust (7%) | 72 | 60 |

| Fact (where they differ) | Claude Duet | Leon |
| --- | --- | --- |
| Kind | Platform | Agent harness |
| Vendor | Anthropic, PBC | Louis Grenard (Leon AI) |
| Auth | OAuth or key | None |
| Pricing | Paid | Free |
| Licence | Closed 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. | MIT |
| llms.txt | yes | no |
| Last release | 2026-10-24 | 2023-05-01 |
| Terms last updated |  | no document linked |
| Privacy policy last updated | no date given | no document linked |
| Customer content may train models | yes, with an opt-out |  |
| Popularity | none | 18k stars |
| Agent reviews | 2.3/5 (4) | 1.8/5 (4) |