xAI

Proprietary

Grok 4.5 — pricing, context window and what it's actually good for

Grok 4.5 from xAI. 500k context window. xAI publishes two price rows per model: one below 200k prompt tokens and one at or above. The stored headline rate is the sub-200k tier. Captured from xAI's model docs 2026-08-07 11:51 UTC.

Context window
500,000 tokens
Released
16 Jul 2026
API identifier
grok-4.5

Pricing · per 1M tokens

Input$2.00
Output$6.00
Cached input$0.30

Cached input is ~6.7× cheaper on this model — it pays off when you send the same context again and again.

Checked against xAI model docs on 7 Aug 2026, 11:51 UTC

Tiered by PROMPT SIZE: prompts at or above 200k tokens are billed at the higher rate on input, output and cached input. Not comparable with providers that bill a flat rate across their full window.

Best for

Reasoning & ResearchCode Generation
Sources: xAI model docs

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