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Grok 4.5

Chat Completions

grok-4.5

by

xAI|Created Jul 8, 2026|500k context

Chat Completions

Grok 4.5 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM.

Overview Specifications Activity Performance Uptime Examples API Reference

Pricing-50%

Pay-as-you-go rates for this model. More details in the billing guide.

Input Tokens (1M)

$1.00

Cached Input Tokens (1M)

$0.15

Output Tokens (1M)

$3.00

Capabilities

Input Modalities

TextImageFile

Output Modalities

Text

Supported Parameters

Available parameters for API requests

Frequency PenaltyMax Completion TokensParallel Tool CallsPredictionPresence PenaltyResponse FormatStopTool ChoiceToolsReasoning EffortLogit BiasTemperatureTop PWeb Search Options

Grok 4.5 Chat Completions API – Pricing, Context Window & Specifications