SpaceXAI: Grok 4.3

proprietary

Grok 4.3 is a reasoning model from SpaceXAI.

Context
1M
Max output
900K
Input price
$1.25/1M tokens
Output price
$2.5/1M tokens

Capabilities

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

Details

Model IDx-ai/grok-4.3
Provider OpenRouter
Creator xAI
Familygrok-4.3
Licenseproprietary
Status—
Typechat
Input modalitiestext, image
Output modalitiestext
Open weightNo
Parameters—
Architecture—
Context window1M tokens
Max input—
Max output900K tokens
Reasoning tokens—
Knowledge cutoff
Release date
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Pricing

Input
$1.25
Output
$2.5
Cache write
—
Cache read
$0.2
Batch in
—
Batch out
—

Family Comparison: grok-4.3

ModelContextMax outPricing
SpaceXAI: Grok 4.3 (batch)1M900K$1$2
SpaceXAI: Grok 4.31M900K$1.25$2.5

API

GET/v1/models/openrouter/x-ai/grok-4.3

SpaceXAI: Grok 4.3

x-ai/grok-4.3

Grok 4.3 is a reasoning model from SpaceXAI.

Changes · 4 entries
x-ai/grok-4.3updateca7a400Nov 2, 2026, 03:02 AM
namexAI: Grok 4.3→SpaceXAI: Grok 4.3
descriptionGrok 4.3 is a reasoning model from xAI.→Grok 4.3 is a reasoning model from SpaceXAI.
max_output_tokens900000
x-ai/grok-4.3updatee3d7dedAug 31, 2026, 04:13 AM
max_output_tokens900000
x-ai/grok-4.3update19c9fe3Aug 5, 2026, 03:04 PM
namexAI: Grok 4.3→SpaceXAI: Grok 4.3
descriptionGrok 4.3 is a reasoning model from xAI.→Grok 4.3 is a reasoning model from SpaceXAI.
x-ai/grok-4.3createbc0fb7dMay 2, 2026, 02:14 AM