explained

FOR THE CURIOUS MINDS

Keep reading.
Stay curious.

Explained is an AI reading assistant for Chrome. Highlight an unfamiliar phrase, click to explain it in context, and keep reading.

API edition · Chrome · Your DeepSeek API key required

A little help for people who read to understand.
StudentsAnalystsResearchers

A SMALL DETOUR WORTH TAKING

Pick a story. Find a new idea.

Three short reads on AI and research, adapted from Anthropic, OpenAI, and DeepSeek. Highlight a phrase and explore.

AI & MEDICINE1 MIN READEnglish + 中文

Making room for a different cancer treatment

CAR T-cell therapy uses modified immune cells to attack cancer. It has helped patients with blood cell cancers(血液肿瘤). Generate aims to reengineer(重新设计) part of the treatment so that it can also work against solid tumor cancers(实体瘤), which present different challenges.

The team focused on the genetic instructions carried by these cells. Shortening one section could leave space for extra instructions, giving researchers more room to adapt the treatment. Six scientists used Claude Code to explore alternative designs for that section.

Anthropic reports that one candidate was around 70% shorter than the conventional design. Laboratory experiments found that cells using it produced roughly ten times as many receptors, attacked tumor cells more effectively, and stayed active longer.

These findings concern an early design tested in a laboratory. They do not establish how a finished treatment would perform in patients. The example shows how AI can contribute a testable proposal while scientists build it, measure its behavior, and decide what to investigate next.

ADAPTED FROM Anthropic · Read the original ↗ — Anthropic

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MATHEMATICS & DISCOVERY1 MIN READEnglish + 中文

From an AI proof to shared understanding

When mathematical waves concentrate, their most extreme behavior may last only briefly. The local smoothing conjecture(局部光滑性猜想) describes how averaging over time limits that concentration. OpenAI reports that its models have produced a proof covering every dimension, with consequences for other longstanding questions.

The announcement also describes results in computer science and physics. Across these fields, a new challenge follows the initial output: helping other researchers understand the argument, check its reasoning, and work out what it changes.

For the mathematical result, OpenAI released both a written argument and a version formalized in Lean(Lean), a system for checking mathematical proofs. For the other results, outside researchers are organizing collaborations, with different arrangements for publishing the underlying materials.

The proposed process emphasizes independent review(独立审查). Participants can discuss their work and publish their own conclusions. A checked proof and a useful explanation serve different purposes: one verifies formal steps, while the other helps a community see the ideas, assumptions, and implications behind them.

ADAPTED FROM OpenAI · Read the original ↗ — OpenAI

You can highlight any phrase, not just the marked terms.

AI & LONG CONTEXT1 MIN READEnglish + 中文

What it takes to read a million tokens

A language model handling a long document must carry information forward as it generates an answer. A one-million-token context(一百万 token 上下文) makes that challenge much larger. The DeepSeek-V4 report presents two models designed to make this scale of input more practical.

The central change is a hybrid attention system. One component compresses stored information and selects relevant entries; another uses stronger compression while retaining dense attention over the compressed entries. Together, they reduce the resources required to handle long sequences.

The report compares DeepSeek-V4-Pro with DeepSeek-V3.2 at a million tokens. For generating one token, it reports inference FLOPs(推理浮点运算量) of 27% and a KV cache(KV 缓存) of 10% relative to the earlier model. These figures describe computation and cached attention data under the stated comparison.

That distinction matters when reading efficiency claims. Lower computation and memory requirements can make extended tasks more feasible, but they do not by themselves specify response speed, price, or answer quality. The paper connects these savings to future work on longer reasoning and tasks spanning many documents.

ADAPTED FROM DeepSeek-AI · arXiv:2606.19348v1 · Read the original ↗ — DeepSeek-AI · arXiv:2606.19348v1

You can highlight any phrase, not just the marked terms.

Need to set up your API key?

Open API settings from the extension toolbar to enter or replace your DeepSeek API key. After enabling lookups, highlight a phrase and click its icon or use the shortcut. API calls are billed to your DeepSeek account.

LESS TAB-HOPPING. MORE UNDERSTANDING.

A small pause.
A clearer picture.

  1. Highlight a phrase

    The word, concept or acronym that makes you pause.

  2. Click to explain

    Click the selection icon or press Ctrl+X (⌘X on Mac) for an explanation beside your reading.

  3. Keep your train of thought

    Read on. Or follow your curiosity a little further.

A MOMENT IN YOUR READING

Making room for a different cancer treatment

CAR T-cell therapy uses modified immune cells to attack cancer. It has helped patients with blood cell cancers(血液肿瘤). Generate aims to reengineer(重新设计) part of the treatment so that it can also work against solid tumor cancers(实体瘤), which present different challenges.

A sample explanation, not a live AI answer.

A little help for the next question

Understand a phrase

Read a short explanation beside the article, with optional nearby context.

Explore a little further

Request a longer explanation with a fresh web search and source links.

Follow recent developments

Use News to explore recent coverage, then check the original sources.

MADE FOR THE “HANG ON…” MOMENTS

Learning starts with
a little not-knowing.

Explained began with an analyst’s reading habit: plenty of interesting ideas, and plenty of things to look up. It’s a small companion for the moment a phrase gets between you and a good story.

Give it a place in your next read

A few things to know

Do I need an API key?

Yes. The downloaded API edition requires your own DeepSeek API key and internet access. DeepSeek bills model and search calls to your API account. A DeepSeek website login does not replace an API key.

What gets shared?

Clicking the selection icon or using the shortcut sends selected text and, if enabled, up to 600 nearby characters to DeepSeek. News, time-sensitive lookups and “Explain a little more” also use web search. Selecting or copying alone sends nothing.

Where does it work?

Normal HTML reading pages in Chrome 114 or later. PDFs, browser settings pages and document editors are outside this preview’s scope.

One small setup. A world to read.

API edition · Chrome · Your DeepSeek API key required

Download & setup

Your reading, with your permission.

This edition uses DeepSeek’s official APIs with your own key. The key and preferences stay in local extension storage. Selected text, optional nearby context and search queries are sent to DeepSeek when you trigger a lookup. The developer stores no lookup history; DeepSeek handles submitted data under its API policies. Read the full privacy notice.