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Grok 4.3

Grok 4.3 is a xAI reasoning model with an improved architecture and a December 2025 knowledge cutoff, matching the scale of Grok 4.20 within a context window of 1M tokens. Your use subject to xAI's Terms & Privacy Policies.

ReasoningTool UseImplicit CachingFile InputVision (Image)Web Search
Use with AI GatewayView docs
import { streamText } from 'ai'


const result = streamText({
  model: 'xai/grok-4.3',
  prompt: 'Why is the sky blue?'
})
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OverviewAboutProvidersThroughputLatencyUptimeStatusSimilarFAQ

Providers

Route requests across multiple providers. Copy a provider slug to set your preference. Visit the docs for more info. Using a provider means you agree to their terms, listed under Legal.

Provider
Context
Max Output
Latency
Throughput
Input
Output
Cache
Web Search
Capabilities
ZDR
No Training
Release Date
xAI
Legal:Terms•Privacy
1M1M
0.9s
137tps
$1.25/M+1 more
$2.50/M+1 more
Read:
$0.2/M+1 more
Write:
—
$5/K
+ input costs
+3
04/30/2026
Google Vertex AI
Legal:Terms•Privacy
1M1M
1.3s
169tps
$1.25/M+1 more
$2.50/M+1 more
Read:
$0.2/M+1 more
Write:
—
$5/K
+ input costs
+2
04/30/2026