Grok 4.5

Key facts

Where Grok 4.5 sits in our data

• Released Jul 8, 2026 (week 28 of 2026), in July 2026. Other models in our data released that month: Gemini Robotics ER 2, GPT-Live-Transcribe, GPT-Transcribe, Claude Opus 5, Gemini 3.5 Flash-Lite, Gemini 3.6 Flash.
• The previous xAI model we track is Grok Build 0.1 (May 19, 2026), 50 days earlier.
• Of the 60 models in our data with a published context window, Grok 4.5 has the number 41 largest (500K tokens). Our data is not every model on the market.
• All releases by date: AI model releases by month · new AI models this week. Choosing for code: best LLM for coding.

How Grok 4.5 differs from Grok 4.6

Read from the recorded facts of the two models, not from a head-to-head test. We have not run either.

• Listed price is the same as Grok 4.6: $2 in and $6 out (per 1M tokens).
• Both list a 500K-token context window.
• Both accept text, image as input.
• Grok 4.5 came out 35 days before Grok 4.6.
• Facts for the other model: Grok 4.6.

What we tested

Nothing yet. We have not run Grok 4.5 ourselves, so every fact on this page is Reported from the sources below. When we do test it, the scope will be stated here and in our test logs. See methodology.

Sources

• xAI release notes
• xAI models and pricing

More from xAI

• Grok 4.6 (Aug 12, 2026)
• Grok Build 0.1 (May 19, 2026)
• Grok Voice Transcribe 2.0 (Sep 17, 2026)
• Grok 4.7 (Sep 21, 2026)
• Grok Voice 3.0 (Oct 14, 2026)
• Grok 4.20 (Mar 10, 2026)

All 88 models