Grok 4.5

Intelligence

Speed

Context

256K

Input price

$2/1M tokens

Output price

$6/1M tokens

Capabilities

Show unsupported (5)

Reasoning & Interaction

Reasoning

Tool Calling

Infrastructure

Streaming

Details

Model IDgrok-4.5

ProviderCursor

Creatorcursor

License—

Status—

Typechat

Input modalitiestext

Output modalitiestext

Open weight—

Parameters—

Architecture—

Context window256K tokens

Max input—

Max output—

Reasoning tokens—

Knowledge cutoff—

Release date—

Sourceofficial

Tools

Function Callingfunction_calling

Call external functions and APIs

Pricing

Input

$2

Output

$6

Cache write

—

Cache read

$0.5

Batch in

—

Batch out

—

Jointly trained by Cursor and SpaceXAI

Family Comparison: grok-4.5

Model	Caps	Perf	Speed	Context	Max out	Pricing
Grok 4.5	RTS			256K	—	$2$6
Grok 4.5 (Fast)	RS	—	—	—	—	$4$18

API

GET/v1/models/cursor/grok-4.5