What does a score of 60 mean?

It means the average similarity between adjacent sentence pairs is moderate. Some transitions are smooth; others have gaps. Review the pair breakdown for the lowest-scoring rows.

How is coherence different from readability?

Readability measures sentence length and vocabulary difficulty. Coherence measures whether ideas connect logically — you can have simple sentences that still jump topics abruptly.

When should I enable Semantic assist?

Always, when possible. Keyword overlap is a weak proxy. Embedding cosine similarity captures conceptual proximity even when sentences share no words.

Does a high coherence score mean good writing?

High coherence means sentences connect well, but does not guarantee persuasive structure, accuracy, or SEO alignment. Use it alongside other quality signals.

Why is only the first 20 sentences used in semantic mode?

To keep the embedding API call small and fast. For long documents, focus on the weakest section identified by the heuristic pass first.

Content & Writing

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Coherence Scorer

Score how logically connected adjacent sentences are across a passage.

Text input

Paste prose. Adjacent sentence pairs are scored. Semantic assist uses /api/embeddings (OpenAI) — stays local when disabled.

Semantic assist — embeds each sentence and scores cosine similarity between adjacent pairs (up to 20 sentences). Disable to use keyword-overlap heuristic only.

Coherence score

High coherence

Heuristic

Mean similarity across 0 adjacent sentence pairs. Scores ≥ 70 indicate smooth logical flow.

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Start here · What is sentence coherence?

Coherence measures whether each sentence flows naturally into the next. Low coherence means ideas jump without smooth transitions, forcing readers to re-read.

This tool splits text into sentences and scores each adjacent pair. With Semantic assist enabled it embeds every sentence via the OpenAI API and computes cosine similarity. Disabled, it falls back to keyword-overlap Jaccard similarity.

The overall score is the mean similarity across all pairs. Pairs with scores below 45 are likely transition gaps worth fixing.

When to use this tool

You have a real task today
Use Coherence Scorer when you need to score how logically connected adjacent sentences are across a passage. That might be a launch checklist, a client question, or a ticket that says "quick check before we publish."
You are learning what the numbers or text mean
Run Examples below with a tiny input. Run one real draft through the tool before you rewrite a whole content library. Watching one clean input change is the fastest way to build intuition.
You are scaling across many URLs or writers
Prove the workflow once here, then repeat the same pattern in a spreadsheet, Notion database, or your SEO platform. This page is the sandbox; your tracker is the production line.

Examples

Walk through these with the form above — they are practice scenarios, not live data.

Minimal first run (recommended)

Try this

Give the smallest honest input the labels allow — one short paragraph, one keyword, one staging URL, etc. Avoid pasting an entire site on the first try.

What to look for

Notice the shape of the result: lists, scores, generated copy, or checks. Coherence Scorer makes sense once you have seen one full input→output cycle.

Real page or real draft

Try this

Paste a draft, outline, keyword, or page text from one URL. Use something you would actually ship or review, not placeholder text.

What to look for

Look for the recommendations that make the page clearer, more complete, or easier to scan. If the result surprises you, change only one variable and run again.

Short tutorial

Follow in order the first time you use the tool; later you can skip to the step you need.

Step 1 — Read labels and placeholders
The Coherence Scorer form tells you whether to fetch a https:// URL, paste raw text, or drop HTML. Placeholders show the format the tool expects.
Step 2 — Enter the smallest useful input
Start with the minimum that still describes the page or problem. Add more only if the output is empty, thin, or obviously wrong.
Step 3 — Run and scan the output
Use the main action (Analyze, Fetch, Generate, Score, etc.). Read headings and numbers before you copy anything — you are checking for sanity, not chasing perfection on the first pass.
Step 4 — Copy, file a ticket, or iterate
Paste the snippets you need into your CMS or doc. If something is off, change one field at a time so you learn what moved the result.

More detail

Coherent prose keeps readers inside your argument. Each sentence acts as a bridge to the next, recycling a word, concept, or grammatical structure so the reader never has to jump back. When coherence breaks, bounce rates rise and comprehension drops — especially on mobile where readers skim. This scorer surfaces the weakest sentence-pair bridges so you can revise specifically rather than rewriting at random.

FAQ

What does a score of 60 mean?: It means the average similarity between adjacent sentence pairs is moderate. Some transitions are smooth; others have gaps. Review the pair breakdown for the lowest-scoring rows.
How is coherence different from readability?: Readability measures sentence length and vocabulary difficulty. Coherence measures whether ideas connect logically — you can have simple sentences that still jump topics abruptly.
When should I enable Semantic assist?: Always, when possible. Keyword overlap is a weak proxy. Embedding cosine similarity captures conceptual proximity even when sentences share no words.
Does a high coherence score mean good writing?: High coherence means sentences connect well, but does not guarantee persuasive structure, accuracy, or SEO alignment. Use it alongside other quality signals.
Why is only the first 20 sentences used in semantic mode?: To keep the embedding API call small and fast. For long documents, focus on the weakest section identified by the heuristic pass first.