domain-countNumber of groups in `search_result_groups` (`search.domain_count`). Measured 22 Aug 2026: 9–16. The domain set itself changes daily for almost every question (Jaccard distance in the noise band); the count is more stable.
| Prompt | 20 Aug 2026 | 21 Aug 2026 | 22 Aug 2026 |
|---|---|---|---|
| K1-01 instant | 7 | 9 | 9 |
| K1-01 thinking | 9 | 8 | 8 |
| K1-02 instant | – | 9 | 10 |
| K10-01 instant | – | 14 | 14 |
| K11-01 instant | – | 4 | 7 |
| K11-02 instant | – | – | 6 |
| K13-01 instant | – | 17 | 26 |
| K2-01 instant | 12 | 10 | 9 |
| K2-01 thinking | 12 | 13 | 13 |
| K2-02 instant | – | 10 | 11 |
| K2-03 instant | – | 4 | 7 |
| K3-01 instant | – | 9 | 10 |
| K3-02 instant | – | 2 | 12 |
| K5-01 instant | 4 | 2 | 3 |
| K5-01 thinking | 6 | 68 | 6 |
| K5-02 instant | – | 11 | 17 |
| K6-01 instant | 10 | 4 | 3 |
| K6-01 thinking | 3 | 2 | 2 |
| K6-02 instant | – | 8 | 7 |
| K7-01 instant | – | 4 | 3 |
| K7-02 instant | – | 4 | 18 |
| K8-01 instant | – | – | 2 |
| K9-02 instant | – | 10 | – |