SpaceXAI: Grok 4.5

proprietary

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

Context
500K
Max output
450K
Input price
$2/1M tokens
Output price
$6/1M tokens

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode
Infrastructure
Streaming
Batch Processing

Details

Model IDx-ai/grok-4.5
Provider OpenRouter
Creator xAI
Familygrok-4.5
Licenseproprietary
Status—
Typechat
Input modalitiestext, image
Output modalitiestext
Open weightNo
Parameters—
Architecture—
Context window500K tokens
Max input—
Max output450K tokens
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
$0.3
Batch in
—
Batch out
—

API

GET/v1/models/openrouter/x-ai/grok-4.5