reasoningReleased 2026-04

Grok 4.3

By xAI · Reasoning flagship, value-priced.

Input / 1M

$1.25

Output / 1M

$2.50

Context

1M tokens

Max output

—

Grok 4.3 pricing

Grok 4.3 costs $1.25 per million input tokens and $2.50 per million output tokens at standard API rates. That makes it cheaper than 12 of 25 other tracked models on input.

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Grok 4.3 benchmarks

GPQA Diamond90.1%

IFBench81%

Specs

Maker: xAI
Category: reasoning
Released: 2026-04
Modalities: text, vision, video
Open weights: No (proprietary API)
Context window: 1M tokens
Max output: —
Speed: 151.8 tokens/sec

Official API docs ↗

Compare Grok 4.3 with

GPT-5.5 Pro

OpenAI · $30.00/$180.00 per 1M

GPT-5.2-Codex

OpenAI · $1.75/$14.00 per 1M

DeepSeek-R1

DeepSeek · $0.55/$2.19 per 1M

GPT-5.5

OpenAI · $5.00/$30.00 per 1M

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Data verified 2026-06-20. Prices are standard USD API rates per 1M tokens.