SimpleQA — Hallucination-rate metric on SimpleQA, distinct from the accuracy/correctness metric.
| # | Model | Vendor | Best score | Runs | Last seen |
|---|---|---|---|---|---|
| 1 | o4-mini | OpenAI | 0.8 | 1 | 2026-06-13 |
| 2 | o3 | OpenAI | 0.5 | 1 | 2026-06-13 |
| 3 | o1 | OpenAI | 0.4 | 1 | 2026-06-13 |
Best tracked score per model (default configuration; source-attributed and verification-tiered). Open a model for its full benchmark surface, provenance and pricing.