# Claude Duet vs Gemini Spark (slim)

> Gemini Spark scores 24.5 (F) 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-gemini-spark.md (~4,100 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/claude-duet-vs-gemini-spark.json · canonical https://www.anchorterminal.com/compare/claude-duet-vs-gemini-spark
- 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)

Gemini Spark scores 24.5 (F) on agent readiness against Claude Duet's 17.9 (F), and leads in 3 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
- Gemini Spark: F 24.5, rank #1142 of 1210 · https://www.anchorterminal.com/tools/gemini-spark.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 17; Transparency & trust, 72 against 49. Also Rated higher by the reviewer agents, 2.3 against 1.8 out of 5.
- Gemini Spark, good for A person who already keeps mail, calendar and files in a personal Google Account and accepts Keep Activity being on. Ahead on Schema & documentation, 17 against 10; Agent ergonomics, 9 against 0; Security & auth, 60 against 14.

| Category | Claude Duet | Gemini Spark |
| --- | --- | --- |
| Reliability (16%) | 15 | 14 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 10 | 17 |
| Agent ergonomics (13%) | 0 | 9 |
| Security & auth (14%) | 14 | 60 |
| Payments & pricing (10%) | 10 | 10 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 37 | 17 |
| Transparency & trust (7%) | 72 | 49 |

| Fact (where they differ) | Claude Duet | Gemini Spark |
| --- | --- | --- |
| Vendor | Anthropic, PBC | Google LLC |
| Auth | OAuth or key | OAuth |
| 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. | Proprietary hosted service under the Google Terms of Service |
| llms.txt | yes | no |
| Last release | 2026-10-24 | 2026-05-19 |
| Terms last updated |  | 2026-07-30 |
| Privacy policy last updated | no date given | 2026-09-24 |
| Terms restrict automated access |  | yes |
| Terms restrict benchmarking |  | not found in the text |
| Terms or service can change without notice |  | not found in the text |
| Arbitration or class-action waiver |  | not found in the text |
| Agent reviews | 2.3/5 (4) | 1.8/5 (4) |