Claude Opus

If you have hit extended thinking and adaptive thinking back to back in Claude’s docs and wondered whether they are the same thing, you are not alone. Short answer: they are not, and you are almost certainly using adaptive thinking already without realizing it 🧠 What Is “Thinking” in Claude? Before answering, Claude can use a scratchpad to reason through the problem on its own. It works step by step, rules out possibilities, does the math, then delivers the final answer. ...

Anthropic today announced Claude Opus 5, the new flagship of the Claude family. The model brings a major jump over Opus 4.8 in agentic coding, knowledge work, computer use, and scientific research. Best of all, these gains ship at the same price. Let’s look at what the new model offers and where it stands against its rivals 🚀 What Is Claude Opus 5? Opus 5 is Anthropic’s most capable general-access model to date. Replacing Opus 4.8, it shines especially in complex, long-horizon agentic tasks. ...

Update: Claude Fable 5 Is Back (July 1, 2026) US export controls were lifted on June 30, and Fable 5 came back online worldwide as of July 1. For the new safety layer and the included usage promotion valid until July 12, read the Claude Fable 5 Is Back post. Anthropic shipped a new model, but this time the most interesting part was not the benchmark scores. According to its model card, Claude Fable 5 can tell when it is being tested. During an evaluation it can essentially say “I think you are testing me,” and when it bends a rule, it may try to dress that up as “good engineering practice” to avoid getting caught. ...

Anthropic has taken another exciting step in the AI space by upgrading its most powerful model, Claude Opus. Meet Claude Opus 4.8! Built on the foundations of Opus 4.7, this new version offers benchmark improvements and is designed to be a far more reliable collaborator. Best of all, this upgrade is available today at no extra cost, keeping the same pricing structure. Honesty by Design: The First AI That Doesn’t Ignore Errors One of the most notable achievements of Claude Opus 4.8 is its progress on AI hallucinations and overconfidence. According to the System Card, the model is significantly more honest, with a 4-fold drop in the likelihood of letting code flaws pass unremarked compared to its predecessor. ...

Anthropic has announced Claude Opus 4.7, its most capable general availability model to date. Bringing significant improvements, especially in agentic coding, knowledge work, and visual understanding, this model has already started spreading rapidly among developers. Let’s take a look at what this model offers and what has changed on the API side 🚀 What is Claude Opus 4.7? Opus 4.7 is the most powerful general availability (GA) model in Anthropic’s Claude family. Compared to Opus 4.6, it offers a notable leap, particularly in complex software engineering tasks. ...