Quick answer: Grok 4.5 is xAI's July 2026 model scoring 50.5% LHTB. Proprietary — xAI's incremental update.
Grok 4.5 is xAI's July 2026 incremental release, scoring 50.5% on LHTB (Language+Human Tasks Benchmark). Positioned between Grok 4.20 and future Grok 5 releases.
| Field | Value |
|---|---|
| Organization | xAI |
| License | Proprietary (API only) |
| Release date | July 8, 2026 |
| Modality | Text only |
| Benchmark | Score | Source | Date |
|---|---|---|---|
| LHTB | 50.5% | Benchgen evaluation | 2026-07 |
Available via API. Refer to provider pricing.
| Model | LHTB | License |
|---|---|---|
| Grok 4 5 | 50.5% | Proprietary |
| Grok 4 20 | — | — |
Check the LHTB leaderboard for current comparisons.
Scores from Benchgen evaluations. Last updated 2026-07-24.