Which AI Tool Is Best for Reading Long Judgments?
Reading a 100-page or 300-page judgment becomes much easier when the right AI tool is used. NotebookLM is one of the best AI tools for reading long judgments, while ChatGPT and Gemini are particularly useful for explaining difficult reasoning and analysing large documents. However, no single tool is perfect for every legal task. The right choice depends on whether the aim is reading, summarising, comparing or researching a judgment.
Why Are Long Judgments Difficult to Read?
A long judgment is not difficult simply because it has many pages. The real difficulty is finding and understanding the parts that actually matter.
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A Supreme Court or High Court judgment may contain facts, procedural history, submissions of different parties, discussions of earlier cases, statutory provisions, constitutional questions, observations of the judges and the final reasoning of the Court.
In larger Bench decisions, there may also be separate majority, concurring and dissenting opinions.
This means that simply asking an AI tool to “summarise this judgment” may not always be enough. A useful AI tool for reading judgments should allow a student to ask detailed questions and return to specific portions of the judgment whenever required.
Which Is the Best AI Tool for Reading Long Judgments?
For students who mainly want to read, understand and ask questions from a long judgment, NotebookLM is one of the strongest choices.
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Its main advantage is that it is built around the sources uploaded to it. You can upload a judgment and then ask questions based on that material.
For example, instead of reading a 250-page judgment from beginning to end immediately, you can ask:
- What are the main facts of this case?
- What questions of law did the Court consider?
- What arguments were made by the petitioner and respondent?
- Which previous judgments did the Court discuss?
- What is the ratio decidendi of the case?
- Was there a dissenting opinion?
- Explain the reasoning of the majority in simple language.
NotebookLM also provides source references that make it easier to move back to the relevant part of the uploaded material.
Google currently states that a source in NotebookLM can contain up to 500,000 words or 200 MB for a local upload, making it capable of handling very large legal materials.
Why NotebookLM Works Well for Law Students
One of the biggest problems while using general AI tools for legal study is that the response may include information beyond the document being studied.
That is not always desirable.
Suppose you are reading Kesavananda Bharati v State of Kerala. At that stage, you may simply want to know what the judges said in the judgment. You may not want the AI tool to mix the original judgment with later developments, blog posts or general explanations available online.
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NotebookLM is particularly useful in such situations because the uploaded sources remain central to the conversation.
It can therefore work like an AI-assisted reading companion rather than merely a general chatbot.
Is Gemini Good for Reading Long Judgments?
Yes. Gemini is especially useful when you are dealing with extremely large legal documents or several documents together.
Google states that Gemini’s AI Pro and AI Ultra plans can provide a context window of up to one million tokens, which can handle approximately 1,500 pages of text.
This can be useful when legal research involves more than one judgment.
For example, you may want to upload:
- a Supreme Court judgment;
- two or three earlier precedents cited in it;
- a dissenting opinion;
- relevant statutory provisions; and
- another later judgment dealing with the same principle.
You can then ask Gemini to compare how the legal principle developed across these materials.
When Should You Use Gemini?
Gemini makes more sense when the task involves large-scale document analysis.
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For example, you can ask:
“Compare how the Supreme Court interpreted Article 21 in these five judgments and explain how the interpretation changed over time.”
Such questions require the AI system to consider information located across several documents rather than simply summarising one judgment.
However, Google itself warns that when uploaded material exceeds the available context window, the response may miss connections or details appearing in different parts of the documents.
Therefore, even a very large context window does not remove the need to verify important legal conclusions.
Is ChatGPT Good for Reading Judgments?
ChatGPT is particularly useful when the objective is to understand complicated legal reasoning in simple language.
A judgment may use long sentences, older legal expressions, constitutional terminology or discussions of several precedents. This can make even a relatively short judgment difficult for a beginner.
You can upload the judgment to ChatGPT and ask questions such as:
“Explain paragraphs 75 to 95 in simple English.”
“Why did the Court reject the appellant’s argument?”
“Explain the difference between the ratio and the observations made by the Court.”
“Convert this judgment into case notes with facts, issues, arguments, reasoning, ratio and decision.”
ChatGPT currently supports document uploads of up to 512 MB per file, with text and document files subject to a limit of up to two million tokens per file.
Where ChatGPT Becomes More Useful
ChatGPT becomes particularly valuable after the basic reading of the judgment.
Suppose you understand what the Court decided but cannot understand why a particular precedent was distinguished.
Instead of repeatedly rereading five pages of complicated reasoning, you can provide that section and ask ChatGPT to explain the distinction step by step.
You can also use it for active learning.
For example:
“Ask me 10 questions from this judgment one by one and check whether my answers are correct.”
This converts AI from a simple summarisation tool into a study tool.
What About Perplexity for Reading Judgments?
Perplexity can analyse uploaded PDFs, but its strongest use in legal work is often research around a judgment rather than simply reading the judgment itself.
Perplexity’s paid offerings support file analysis and provide access to research-oriented searches with citations.
This makes it useful when questions go beyond the uploaded judgment.
For example:
“Which later Supreme Court judgments cited this case?”
“Has this judgment been overruled?”
“What recent judgments have applied this principle?”
“Find commentary discussing the impact of this judgment.”
These are research questions rather than document-reading questions.
Therefore, Perplexity can complement tools such as NotebookLM or ChatGPT rather than necessarily replacing them.
NotebookLM vs ChatGPT vs Gemini for Long Judgments
The best tool depends on what you are trying to do.
| Requirement | AI Tool That May Be Most Useful |
| Reading one very long judgment | NotebookLM |
| Asking questions strictly from uploaded sources | NotebookLM |
| Understanding difficult judicial reasoning | ChatGPT |
| Converting judgments into simple notes | ChatGPT |
| Analysing extremely large documents | Gemini |
| Comparing several long judgments | Gemini |
| Researching later cases and related developments | Perplexity |
| Studying a judgment interactively | NotebookLM or ChatGPT |
This does not mean that one tool cannot perform the functions listed under another. Most leading AI tools now overlap considerably. The distinction is mainly about where each tool is particularly convenient.
What Is the Best Way to Use AI for Reading Judgments?
A better approach is to use AI in stages rather than expecting one prompt to explain an entire judgment perfectly.
Step 1: Understand the Basic Structure
First ask the AI to identify the parties, facts, legal issues, important statutes and final decision.
This creates a basic map of the judgment before going into detailed reasoning.
Step 2: Read the Important Portions
Once the important sections are identified, read those portions of the original judgment.
AI should help in locating and understanding the relevant parts, not replace the judgment itself.
Step 3: Ask Questions About the Reasoning
If a paragraph is difficult, ask the AI to explain it in simpler language.
Questions such as “Why did the Court reach this conclusion?” are generally more useful than repeatedly asking for summaries.
Step 4: Identify the Ratio and Important Observations
Ask the tool to separate the central legal principle from other observations made by the Court.
However, this should always be verified from the original judgment because identifying the precise ratio can itself involve legal interpretation.
Step 5: Research What Happened After the Judgment
After understanding the case, research whether later courts followed, distinguished, limited or overruled it.
This is where legal databases and research-oriented AI tools become important.
Can AI Replace Reading the Original Judgment?
No. AI can make judgment reading significantly faster, but it should not replace the original judgment.
This is particularly important for law students, researchers and lawyers.
An AI-generated summary may miss a qualification attached to a legal principle. It may also treat an observation as the ratio, overlook a dissent, simplify an important distinction between precedents or fail to appreciate the procedural context in which a statement was made.
For academic assignments, moot court preparation, legal research or professional work, important propositions should therefore be checked against the actual judgment.
AI should reduce the time required to understand the case. It should not become the final authority on what the case says.
Are Paid AI Tools Necessary for Reading Judgments?
Not necessarily.
If you occasionally read short or medium-sized judgments, the free versions of popular AI tools may be sufficient for basic summaries and explanations.
Paid plans become more useful when you regularly work with very long PDFs, upload several documents together or need larger context windows and higher usage limits.
Therefore, a law student does not need to purchase several AI subscriptions simply because different tools exist.
Start with the free tools available and upgrade only when the limits genuinely affect the work.
Final Thoughts
If the main purpose is reading long judgments and asking questions directly from the uploaded material, NotebookLM is one of the best places to start. Gemini is particularly useful for very large documents and multi-document analysis, while ChatGPT works well for explaining difficult legal reasoning and creating structured study material. Perplexity is more useful when the research expands beyond the judgment.
The most effective method, however, is not to blindly depend on any AI tool. Use AI to locate important portions, understand difficult reasoning, prepare notes and ask better questions. For every important legal proposition, return to the original judgment and verify what the Court actually said.
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