Grok 4.3

xAI's latest flagship model with reasoning and a 1M token context window. Supports text and image inputs, with reasoning_effort control (none/low/medium/high/xhigh). Knowledge cutoff: December 2025.

1M context·$1.25 in·$2.50 out·Apr 2026 release·Vision, Reasoning, Tools / functions, Web search

Available on

SpaceXAI OpenRouter AWS Bedrock

Providers

Where Grok 4.3 runs in Big-AGI, with each service's own model ID and USD-per-1M-token rates. The summary above prefers the creator's claim; rates below are each service's own.

ServiceModel IDContextInputOutputCache read

SpaceXAI

creator

grok-4.3

$1.25

$2.50

$0.20

OpenRouter

x-ai/grok-4.3

$1.25

$2.50

$0.20

AWS Bedrock

xai.grok-4.3

131K

Usage mix in Big-AGI: SpaceXAI 51% · OpenRouter 49%Specs as reported by each service · usage over the last 2 days · refreshed hourly

Run Grok 4.3 in Big-AGI.

Connect your own key on any of the services above, at their rates, no markup - and run it side by side with every other model.

Launch Big-AGI

BIG-AGI

Product

Features Models Controls What's new BEAM Technology

Resources

Documentation Discord GitHub

Company

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