AI Reference 072 Modern Model Families Current · Aug 2026 Primary sources linked

Grok 4.5

Definition

SpaceXAI introduced Grok 4.5 in July 2026 for coding, agentic tasks and knowledge work, then expanded its availability through the company's own products and integrations including GitHub Copilot.

What is Grok 4.5?

SpaceXAI introduced Grok 4.5 in July 2026 for coding, agentic tasks and knowledge work. It belongs to the later Grok 4 generation rather than the original 2023 chatbot model.

How it is distributed

SpaceXAI offers Grok through its own products and API, and the company has announced integrations with external developer platforms. Availability can differ between the chatbot, API and partner services.

Why current pages need dates

The Grok product line has changed rapidly. Wikipedia and third-party lists may show different 'latest' labels depending on when they were updated. First-party release notes should be used to verify the exact current model offered by an API or product.

Related terms, defined

Modern Model Families The Mistral Model Family Mistral AI develops commercial and open-weight language models for general generation, coding, multimodal and specialist workloads. Modern Model Families Cohere Command Models Cohere's Command family is designed heavily around enterprise generation, retrieval, tool use and multilingual applications. Cohere's 2026 documentation lists Command A+ as a mixture-of-experts model with text and image input support. Modern Model Families Open, Open-Weight and Closed AI Models AI models differ in what users can inspect and control. Open-weight models make trained parameters available under a license; closed models are typically accessed through hosted products or APIs. Modern Model Families The GPT Model Family GPT is OpenAI's family of generative pretrained transformer models, evolving from research language models into multimodal, reasoning and tool-using systems. Modern Model Families GPT-5.4 OpenAI released GPT-5.4 in March 2026 for professional work, with GPT-5.4 Thinking in ChatGPT and GPT-5.4 plus GPT-5.4 Pro in the API. OpenAI later released GPT-5.4 mini and nano as faster, lower-cost members of the same generation.

Reference guide and primary sources

Wikipedia is used here as a terminology and history reference guide. Current model versions, institutional statistics and product-specific claims are also linked to first-party or institutional sources because those details can change faster than encyclopedia articles.

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