Grok 4.5
Grok 4.5 is xAI's frontier model, released July 8, 2026, priced at $2 per million input tokens and $6 per million output. It scores 56 on the Artificial Analysis Intelligence Index with a 500K-token context window — the only sub-1M context in the tracked frontier — and retains live X data access.
Spec sheet
| Maker | xAI (SpaceX) |
|---|---|
| Released | 2026-07-08 |
| API ID | grok-4-5 |
| Parameters | Not disclosed |
| Context window | 512K tokens |
| Modalities in | text, image |
| Modalities out | text |
| API availability | xAI API · OpenRouter (unverified) |
| Pricing (per MTok) | $2 in / $6 outas of · source |
Benchmarks
| Benchmark | Score | Measured | Source |
|---|---|---|---|
| AA Intelligence Index | 56 | artificialanalysis.ai |
Dashed values are vendor-published and not yet reproduced in our harness — methodology.
Changelog
- Grok 4.5 releasedsource
Head-to-head
Profile published August 11, 2026; data last changed August 11, 2026. Every value carries its own measurement or verification date. Flagged values are best-known public figures pending confirmation.