AI Reference 068 Modern Model Families Current · Aug 2026 Primary sources linked

DeepSeek V4

Definition

DeepSeek's April 2026 API changelog lists V4-Pro and V4-Flash. It also states that the older deepseek-chat and deepseek-reasoner names would be discontinued after temporarily mapping to modes of V4-Flash.

What is DeepSeek V4?

DeepSeek's 2026 API changelog lists DeepSeek V4-Pro and V4-Flash, released in April 2026. The company also stated that legacy names deepseek-chat and deepseek-reasoner would be retired after temporarily mapping to V4-Flash modes.

What the Pro and Flash names indicate

The naming separates a higher-capability tier from a faster efficiency-oriented tier. This mirrors a broader industry pattern in which applications route simple requests to cheaper models and reserve larger models for more demanding reasoning.

Why the changelog is the right source

Current model names can change faster than encyclopedic summaries. DeepSeek's API changelog and release notes are therefore the most reliable references for current endpoint names and model availability.

Related terms, defined

Modern Model Families The Llama Model Family Llama is Meta's open-weight language-model family, beginning with a 2023 research release and expanding into developer-focused multimodal models. Modern Model Families Llama 4 Scout and Maverick Meta released Llama 4 Scout and Maverick in April 2025 as natively multimodal mixture-of-experts models. Meta describes Scout as having 17 billion active parameters and 16 experts, and Maverick as having 17 billion active parameters and 128 experts. Modern Model Families The Grok Model Family Grok is the model family developed by xAI/SpaceXAI, spanning general reasoning, coding, voice and generative-media systems. Modern Model Families Grok 4.5 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. Modern Model Families The Mistral Model Family Mistral AI develops commercial and open-weight language models for general generation, coding, multimodal and specialist workloads.

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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