xAI · Grok 4

Grok 4.3Flagship

CurrentStale · Jun 12, 2026

xAI's current flagship Grok model: a reasoning-first multimodal model with a 1M-token context window, text and image input, and aggressively low pricing. Released to the public API on 2026-04-30.

profile normalized against the 47-model field

Context window· 1M of 1.05M95%

Max output—

Output speed—

Affordability· $2.50 / Mtok out99%

Capability breadth· 3 of 1127%

Capability switches · 3 of 11

Reasoning mode

Tool / function use

Streaming

JSON mode

Structured outputs

Prompt caching

Fine-tuning

Web search

Code execution

Vision input

Audio input

Specifications

Every value carries a primary source and a verification date.

Capacity

Context window

Pricing

Input $/Mtok

$1.25 / 1M input tokens USD/Mtok

Output $/Mtok

$2.50 / 1M output tokens USD/Mtok

Capabilities

Input modalities

text, image

Output modalities

text

Reasoning mode

true

Tool / function use

Yes

Vision input

Yes (image input)

API

API model ID

grok-4.3

Rate limits

1,800 RPM / 10M TPM

General

Knowledge cutoff

November 2024

Benchmarks

Sourced evaluation scores, each verified against its primary source.

GPQA Diamond

Grok 4.3: 90.1% — Benchmark score on AA-GPQA Diamond, Updated May 28, 2026 (source: Artificial Analysis GPQA Diamond / AA-GPQA Diamond)

90.1 %Unverified

Related news

release· Apr 30, 2026

xAI launches Grok 4.3 on the API

xAI opened Grok 4.3 on its public API on April 30, 2026, after a SuperGrok Heavy beta that began April 17. xAI emphasizes improved agentic performance and a lower cost to run benchmark suites. On Artificial Analysis, Grok 4.3 posts an Intelligence Index of 53, with its largest single gain on GDPval-AA (ELO 1500, up 321 points from Grok 4.20), plus 98% on tau-squared-Bench Telecom and 81% on IFBench. The release ships a 1M-token context window.

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