Grok 4.5

Name: Grok 4.5
Author: xAI

xAI

xAI's Grok 4.5 flagship for chat, coding, and agentic tool use, with lower hallucination risk.

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Specs

Model

Family: Grok
Variant: 4.5
Weights: Proprietary

Limits

Context: 500,000 tokens
Max output: 500,000 tokens

Modalities

Input: Text Image PDF
Output: Text

Pricing

Input: $2 / 1M
Output: $6 / 1M
Cache read: $0.3 / 1M

Capabilities

Reasoning: Yes
Reasoning control: Effort levels
Tool calling: Yes
Attachments: Yes

Dates

Released: 8 Jul 2026

Articles

All articles

14 Aug 2026

Measuring Autonomous AI Research

We ran 153 autonomous runs across 18 frontier models on the nanoGPT optimizer speedrun.

Elie Bakouch

primeintellect.ai

16 Jul 2026

Introducing Grok 4.5

Today, we're launching Grok 4.5, SpaceXAI's smartest model built to excel at coding, agentic tasks, and knowledge work. It's our strongest model ever and was trained alongside Cursor.

xAI

x.ai

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xAI's frontier Grok model, tuned for long-running agents, coding, knowledge work, and visual projects.

$2 / $6 per 1M · $0.5 cached 7w ago