Grok 4.3 — pricing, context window and what it's actually good for

Grok 4.3 from xAI. 1000k 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: 1,000,000 tokens
API identifier: grok-4.3

Pricing · per 1M tokens

Input$1.25

Output$2.50

Cached input$0.20

Cached input is ~6.3× 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 & Research Code Generation Data Extraction & RAG

Used for

Where Grok 4.3 shows up in practice

The workflows where we shortlist Grok 4.3 against the alternatives. Each page says why, at what price, and where a cheaper model does the job instead.

AI Agents for Sales Automation AI for Market and Competitive Research

Sources: xAI model docs

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