Grok 4.5 is xAI's July 2026 flagship for coding, agentic work, and knowledge tasks: 500K context, $2/1M input, $6/1M output, and $0.50 cached input.
By benchr Editorial Team · · Figures verified against official sources, July 13, 2026
Official pricing and limits
Grok 4.5 API pricing: $2 input, $6 output per 1M — official data
Field
Value
Model ID
grok-4.5
Input / 1M
$2.00
Cached input / 1M
$0.50
Output / 1M
$6.00
Context window
500,000 tokens
Knowledge cutoff
February 1, 2026
Reasoning
Configurable
Where it fits
Grok 4.5 is the xAI option to test when a 500K context window covers the job and you want configurable reasoning for code, chat, or agent workflows. Price it against your actual output volume, where most of the bill lands.
When to skip it
Skip it when you need a full 1M context window, where Grok 4.3 and several other models still publish larger context limits, or when procurement requires official benchmark tables that xAI has not published on the checked docs.
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