AI Reference 066 Modern Model Families Current · Aug 2026 Primary sources linked

Claude Opus 4.6

Definition

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.

What is Claude Opus 4.6?

Claude Opus 4.6 is a 2026 Anthropic frontier model in the highest-capability Opus tier. Anthropic's release material and system card cover coding, computer use, long-form knowledge work, safety and alignment evaluations.

Why system cards matter

A system card documents how a company evaluated a model before release: capability tests, safety tests, observed failure modes and mitigation work. It is more useful for understanding a current model than repeating an unsourced leaderboard claim.

How to choose Opus versus smaller Claude models

The highest-capability model is not automatically the best operational choice. Teams compare quality, latency, context requirements and cost. Anthropic's smaller Sonnet or Haiku tiers may be preferable for high-volume tasks that do not require the strongest model.

Related terms, defined

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. Modern Model Families DeepSeek V4 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. 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.

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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