grok-4.5 price 40% cut on 2026-07-19
On 2026-07-19, xAI changed the published API price of grok-4.5. The superseded price had stood for 11 days. This is the only recorded price change for this model in the index.
Every metered token direction on grok-4.5 got cheaper that day. A cut is the direction people notice least, because a lower bill rarely prompts anyone to check what changed.
What changed
| Per 1M tokens | Before | After | Change |
|---|---|---|---|
| Cache read | $0.50 | $0.30 | -40% |
Your recorded history should not change when prices do
A cost tracker carrying a single current-price table would reprice every grok-4.5 session you ran before 2026-07-19 at the new rate, silently restating months you already paid for. See what this change does to a real session, and why dated windows are the fix.
Provenance
Every value here carries a first-party source, and superseded prices are kept rather than overwritten. Windows before the index began are reconstructed from web archives and labelled as archived rather than claimed as first-party.
| Window | Source |
|---|---|
| Cache read, 2026-07-08 to 2026-07-19 | https://docs.x.ai/docs/models |
| Cache read, from 2026-07-19 | https://docs.x.ai/docs/models |
Related
Derived from the AI Price Index, last updated 2026-07-25. Licensed CC BY 4.0: reuse this with credit to the dataset page.