AI Reference 062 Modern Model Families Current · Aug 2026 Primary sources linked

GPT-5.4

Definition

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.

What is GPT-5.4?

GPT-5.4 is a 2026 OpenAI model generation for professional knowledge work. OpenAI released GPT-5.4 in March 2026, including GPT-5.4 Thinking in ChatGPT and GPT-5.4 plus GPT-5.4 Pro for API workloads.

Mini and nano variants

OpenAI subsequently introduced GPT-5.4 mini and nano. These variants target faster or lower-cost workloads where the largest model is unnecessary. The product pattern is important: one model generation can include several sizes optimized for different deployment constraints.

How to compare it responsibly

GPT-5.4 should be compared using the task actually being deployed—coding, long documents, tool use, structured output, latency or cost—not by treating a single benchmark as a universal ranking. OpenAI's own release notes are the correct source for current model availability because the lineup changes quickly.

Related terms, defined

Modern Model Families The Gemini Model Family Gemini is Google's multimodal model family developed by Google DeepMind and integrated into Google products and developer platforms. Modern Model Families Gemini 3.5 Google introduced Gemini 3.5 in May 2026, beginning with Gemini 3.5 Flash, which Google positions for fast agentic workflows. Google also announced Gemini 3.5 Pro as part of the same family. Modern Model Families The Claude Model Family Claude is Anthropic's family of language and multimodal models, with product lines including higher-capability Opus models and efficiency-oriented Sonnet models. Modern Model Families Claude Opus 4.6 Claude Opus 4.6 is a 2026 Anthropic frontier model. Anthropic's system card documents extensive evaluation across coding, computer use, safety, alignment and other capability areas. Modern Model Families The DeepSeek Model Family DeepSeek is a Chinese AI model family known internationally for open-weight language and reasoning systems such as DeepSeek-V3 and R1.

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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