Compare · ChatGPT
ChatGPT for tax research: how it compares with Nylon
ChatGPT is OpenAI’s general-purpose assistant: it searches the web, reads files, runs deep research and has a free tier. Many CPAs, enrolled agents and tax practitioners already ask it tax questions. Before you rely on it, look at four things: what its answers are based on, how you’d check them, what happens to client information you type in, and the cost. This page sets ChatGPT against Nylon on each, shows how to run them together, and says when ChatGPT on its own is the right call.
ChatGPT vs Nylon in five rows
Facts as of October 31, 2026. All prices are in US dollars. Nylon’s exclude sales tax. ChatGPT’s are OpenAI’s list prices before tax, and OpenAI says pricing may vary by country. Sources are further down the page.
ChatGPT
Nylon
Based on
What the model learned in training, plus web pages when it searches
The Internal Revenue Code, Treasury Regulations, IRS guidance and U.S. Tax Court opinions
Sources shown
Sometimes, when it searches; OpenAI says they can be incomplete, outdated or incorrect
Each answer cites the primary source and links to it
Trains on your chats
Free, Go, Plus and Pro: yes, unless you opt out. Business and Enterprise: off by default
Never, on any plan
Price before tax
Free tier; Plus $20 a month; Business Standard $20–$25 per user a month
$39, $99 or $199 per user a month, plus applicable sales tax
Scope
Any subject, with deep research, file uploads and apps
Federal tax, plus drafting and document review
Pick Nylon when a federal tax answer has to trace back to the Code, Treasury Regulations, IRS guidance or a Tax Court opinion. Pick ChatGPT when you mostly need a general assistant for writing and day-to-day tasks, or help outside federal tax. Or combine them: an Adviser or Elite seat lets ChatGPT call Nylon’s research through the connector, if your ChatGPT plan allows connectors.
Each column comes from that vendor’s own website.
Tax research alternatives to ChatGPT, side by side
Each row reflects what the vendor publishes about itself, as of October 31, 2026. Prices are in US dollars.
Nylon
Cited answers from US federal tax sources, in Nylon or your AI assistant
Yes, on all plans
$39, $99 or $199 per user a month, plus applicable sales tax
CCH AnswerConnect
CCH commentary, the U.S. Master Tax Guide and practice tools, across federal, state and international tax
Yes
AnswerConnect Tax listed at $1,499; other packages by quote
Thomson Reuters Checkpoint Edge
Commentary from 680+ editors and contributors, news, and state and international coverage
Yes, citing selected Checkpoint editorial resources
By quote
Lexis+ with Protégé
Legal research and drafting with Shepard’s citation checks
Yes
By quote
Blue J
Cited federal and 50-state tax answers from a curated library
Yes
$1,498 per user a year (Individual plan)
Claude, Gemini or Copilot on their own
Fast drafting when no one has to trace a source
Varies by assistant
Varies by assistant; Claude has a free plan
Where Nylon differs from ChatGPT on tax questions
As of October 31, 2026. ChatGPT is fast, covers everything and drafts well. Nylon is narrower on purpose: federal tax answers you can follow back to the law, available inside ChatGPT as well.
Grounded in federal primary sources
Nylon answers from the Internal Revenue Code, Treasury Regulations, IRS guidance (Revenue Rulings, Revenue Procedures and Notices) and U.S. Tax Court opinions, and links each citation to its source. ChatGPT relies on its training and, if it searches, the web; you can limit its deep research to sites you choose, such as irs.gov. OpenAI’s help center says its search results and citations “can be incomplete, outdated, or incorrect”.
Search the sources yourself, too
Alongside AI answers, Nylon offers traditional document search with a citator, so you can look up an authority directly instead of asking a question. OpenAI’s public pages describe web search, deep research, file uploads and connected apps, but no citator or curated tax library.
Your chats stay out of training
Nothing you type into Nylon is used to train AI models, whatever your plan. OpenAI may train on chats from ChatGPT’s Free, Go, Plus and Pro plans unless you switch off “Improve the model for everyone”. Business and Enterprise workspaces are excluded from training by default.
Use both together
An Adviser or Elite seat includes Nylon’s AI connector for ChatGPT, which lets ChatGPT search Nylon’s library and cite what it finds. Whether you can add it depends on your ChatGPT plan and workspace settings.
1. Nylon
Nylon: cited AI answers from US federal tax sources
Nylon answers federal tax questions from the Internal Revenue Code, Treasury Regulations, IRS guidance and U.S. Tax Court opinions. Every citation links to the source. State tax law is not covered.
Every source one click away
Each answer links its citations to the Code section, regulation, ruling or opinion it relies on, so you can read the wording yourself.
Federal tax library
The Internal Revenue Code, Treasury Regulations, IRS Revenue Rulings, Revenue Procedures and Notices, and U.S. Tax Court opinions.
Advisory drafts and document review
Turn research into a first-draft advisory letter, research memo or tax opinion, or upload a client’s returns, contracts or correspondence and ask what they mean for the matter.
Works where you already work
With an Adviser or Elite seat, Claude, ChatGPT and Microsoft 365 Copilot can search Nylon’s library through its AI connector.
Pricing
Starter $39, Adviser $99 and Elite $199 per user per month, plus applicable sales tax. All prices are in US dollars. Billed monthly per user; cancel anytime, no lock-in. Enterprise pricing on request.
Nylon
How much gain can a taxpayer exclude on the sale of a principal residence?
A taxpayer who owned and used the home as a principal residence for at least 2 of the 5 years before the sale can exclude up to $250,000 of gain, or $500,000 for most married couples filing jointly [1][2].
1
Internal Revenue Code § 121(a)
2
Internal Revenue Code § 121(b)
Illustrative example
Price check · October 31, 2026
$99 / month
Nylon Adviser, per user, plus applicable sales tax. It includes deep research and the AI connector for ChatGPT, Claude and Copilot.
Nylon Adviser
$99
ChatGPT Plus
$20
ChatGPT Business
$25
Per user per month, before tax, as of October 31, 2026. ChatGPT Plus is for one person; Business Standard is $20 billed annually, with at least 2 seats. Use Nylon inside ChatGPT and you pay for both.
ChatGPT and Nylon, feature by feature
Facts as of October 31, 2026. Everything in the ChatGPT column is taken from OpenAI’s website and help center.
Where you use it
On the web, desktop and mobile, with apps for services such as Google Drive, Slack and SharePoint, and Excel, Word, PowerPoint and Google Sheets extensions.
Nylon on the web, plus Claude, ChatGPT and Microsoft 365 Copilot through its AI connector on Adviser and Elite seats.
Contract
Go, Plus and Pro renew automatically and can be canceled at any time; payments are non-refundable except where the law requires. Business is monthly or annual with at least 2 seats; annual seats are committed for the full term.
Billed monthly per user. Cancel anytime, no lock-in. Upgrades are prorated; downgrades take effect immediately.
Price (before tax)
Free tier. Go is $8 a month and Plus $20 a month; Pro starts at $100 a month. Business Standard is $25 per user a month, or $20 if billed annually. Enterprise is through sales. OpenAI says pricing may vary by country.
$39, $99 or $199 per user a month, plus applicable sales tax. Enterprise by quote.
What answers draw on
The model’s training, the web when it searches, and any files or apps you connect. OpenAI’s public pages don’t describe a curated tax library for any country.
Nylon’s library: the Internal Revenue Code, Treasury Regulations, IRS guidance (Revenue Rulings, Revenue Procedures and Notices) and U.S. Tax Court opinions.
Citations
Answers that search the web “may include citations”, which OpenAI warns “can be incomplete, outdated, or incorrect”. Deep research reports come with citations or source links.
Each citation in an answer links to the section, regulation, ruling or opinion it relies on.
Model training
Free, Go, Plus and Pro: OpenAI may train on your chats unless you opt out under Data controls. Business, Enterprise and Edu: excluded from training by default.
Nothing you enter is used to train AI models, whatever the plan.
Jurisdictions
Any subject, any country, drawing on training data and the web.
US federal tax: the Internal Revenue Code, Treasury Regulations, IRS guidance and U.S. Tax Court opinions. State tax law is not covered.
Tools
Deep research, projects, scheduled tasks, custom GPTs, file uploads and apps.
Deep research on Adviser and Elite. Drafts advisory letters, research memos and tax opinions, and reviews the client documents you upload.
Security
Business: SOC 2 Type 2 audit. OpenAI’s ISO/IEC 27001 certificate covers the API, Enterprise and Edu. Its trust portal also lists ISO/IEC 27701 and 42001, among others.
SOC 2 Type 1, SOC 2 Type 2, ISO 27001, ISO 42001
Try before you buy
A free tier.
Book a demo and test Nylon on questions from your own work.
What you gain with Nylon
Answers cited to the Internal Revenue Code, Treasury Regulations, IRS guidance and Tax Court opinions
Nothing you enter is used to train AI models, whatever the plan
Document search with a citator, alongside AI answers
Cited answers from inside ChatGPT, Claude and Microsoft 365 Copilot (Adviser and Elite)
What you give up
ChatGPT’s free tier, and Plus at $20 a month
An all-purpose assistant for any subject, including questions outside federal tax
ChatGPT apps for services such as Google Drive, Slack and SharePoint, and its Office extensions
Put your ChatGPT tax questions to Nylon
Pick three tax questions you’ve asked ChatGPT recently. We’ll run them through Nylon in a demo, so you can check every answer against its sources.
More tax research alternatives to ChatGPT
Summaries drawn from each vendor’s own website, as of October 31, 2026. Prices in US dollars.
2
CCH AnswerConnect
Wolters Kluwer’s tax research platform. It pairs CCH editorial content with AI answers (Expert AI) that Wolters Kluwer says are backed by citations, across federal, state, local and international tax, with accounting and audit in higher packages.
Suited to
Firms that rely on CCH commentary and use ProSystem fx Tax, ATX or TaxWise.
Pricing
AnswerConnect Tax is listed at $1,499 on the Wolters Kluwer eStore, with tax added at checkout; the listing doesn’t state the number of users or the term. The U.S. Master Tax Guide Plus package is $415. Wider packages are by quote. 7-day free trial.
Consider it if
You want state and international tax, CCH commentary and Smart Charts next to AI answers.
3
Thomson Reuters Checkpoint Edge
Thomson Reuters’ tax and accounting research platform, with commentary from 680+ editors and contributors, integrated primary sources, daily news and AI-Assisted Research through CoCounsel.
Suited to
Firms that want expert-written commentary and state charts, and already use Thomson Reuters tools such as UltraTax CS.
Pricing
Checkpoint Edge by quote. CoCounsel Tax Essentials is $1,300 per user a year, but it excludes the Checkpoint Edge research library.
Consider it if
Expert-written commentary and state coverage matter most to you; its AI answers cite selected Checkpoint editorial resources, such as the Federal Tax Coordinator.
4
Lexis+ with Protégé
LexisNexis’s AI for legal research, analysis and drafting, called Lexis+ AI until February 2026. It draws on LexisNexis primary law and secondary sources, and Shepard’s Verify checks the citations in its answers.
Suited to
Law firms and legal departments with wide-ranging legal research.
Pricing
By quote; 2-day free trial.
Consider it if
Most of your work is legal, not tax; LexisNexis aims this product at legal professionals and sells its US tax research platform, Tolley+ with Protégé, separately.
5
Blue J
An AI tax research platform. Blue J says it answers from its own library of federal and state sources, not the open web, with inline citations you can open.
Suited to
Firms wanting cited answers across federal and all 50 states, with memo and client email drafting.
Pricing
Individual plan $1,498 per user a year, on an annual term; Team and Enterprise by quote. 7-day free trial.
Consider it if
You need state and local tax alongside federal, and an annual plan suits you.
6
Claude, Gemini or Copilot on their own
General assistants from Anthropic, Google and Microsoft. Like ChatGPT, they are built for any subject, not tax specifically.
Suited to
Drafting and getting your bearings when no one has to trace the answer.
Pricing
Varies by assistant; Claude has a free plan.
Consider it if
You connect Nylon’s AI connector to Claude or Copilot (Adviser and Elite), so they search Nylon’s library and cite it.
Which one fits your work?
As of October 31, 2026. Start from the work you do most often.
If federal tax answers must trace back to the law
Nylon
Use it in Nylon, or in ChatGPT, Claude and Copilot with an Adviser or Elite seat. Billed monthly per user, cancel anytime.
If you’d rather stay in ChatGPT
Use both: Nylon inside ChatGPT
Add Nylon’s connector with an Adviser or Elite seat, where your ChatGPT plan and workspace settings permit it. ChatGPT can then search Nylon’s library and cite the source.
If you mostly draft, summarize and brainstorm
ChatGPT
An all-purpose assistant for any subject, with a free tier.
If your team relies on publisher commentary
CCH AnswerConnect or Checkpoint Edge
The U.S. Master Tax Guide, expert commentary, state charts and practice tools.
If most of your work is legal
Lexis+ with Protégé
Wide-ranging legal research with Shepard’s citation checks.
If you need state tax as well as federal
Blue J
Cited answers across federal and all 50 states, on an annual per-user plan.
Security evidence you can ask for
Independent audits and certifications: SOC 2 Type I and Type II reports, ISO 27001 and ISO 42001.
Audited by third parties
Ask for Nylon’s SOC 2 Type I and Type II reports, and check its ISO 27001 and ISO 42001 certificates.
Encrypted
Data is encrypted in transit and at rest.
No training on your work
Your inputs are never used to train AI models.
Controls for admins
Advanced organizational controls come with every plan.
Baqir Hussein, FCCA · Founder & Director, Finex Chartered Certified Accountants, one of 2,000+ firms in Australia, New Zealand and the UK using Nylon
ChatGPT for tax research: common questions
Questions about using Nylon with ChatGPT? Book a demo or email support@usenylon.com.
Can I use ChatGPT for tax research?
For getting your bearings and first drafts, yes, as long as you verify what it says and keep client information confidential. As of October 31, 2026, OpenAI’s terms say not to rely on its output “as a sole source of truth or factual information, or as a substitute for professional advice”, and its Finances help page says ChatGPT “does not replace a tax professional”. With any AI, Nylon included, the advice stays your responsibility. Nylon links each answer to the Code section, regulation, ruling or opinion behind it, so you can check the source yourself.
Is ChatGPT accurate for tax questions?
No AI tool gets everything right, Nylon included. OpenAI’s help center says ChatGPT’s search results and citations “can be incomplete, outdated, or incorrect”, and its terms tell users not to treat output as a sole source of truth. Deep research reports include citations or source links, and you can limit deep research to sites you choose, such as irs.gov. Whichever tool you use, open the cited Code section, regulation or ruling before you rely on an answer. The simplest test is to run the same questions through both tools and check each answer against its sources.
Which alternative to ChatGPT fits tax research?
If you need federal tax answers cited to the Internal Revenue Code, Treasury Regulations, IRS guidance and Tax Court opinions, Nylon: it links each answer to its source, never trains AI models on your inputs, and runs inside ChatGPT with an Adviser or Elite seat where your ChatGPT plan allows. If your team relies on publisher commentary and practice tools, CCH AnswerConnect or Thomson Reuters Checkpoint Edge. For cited federal and state tax answers in one AI tool, Blue J. For legal research, Lexis+ with Protégé.
Does ChatGPT use my clients’ data to train its models?
That depends on your plan. As of October 31, 2026, OpenAI says it may train its models on content from the individual plans (Free, Go, Plus and Pro) unless you switch off “Improve the model for everyone” in Data controls or use a Temporary Chat. By default it doesn’t train on Business, Enterprise or Edu workspace content. Nylon never trains AI models on your inputs, whatever the plan.
How does ChatGPT pricing compare with Nylon?
As of October 31, 2026, OpenAI lists ChatGPT Go at $8 a month, Plus at $20 a month and Pro from $100 a month, and Business Standard at $25 per user a month, or $20 billed annually, with at least 2 seats. Those are list prices before tax, and OpenAI says pricing may vary by country; there’s also a free tier. Nylon is $39, $99 or $199 per user a month, plus applicable sales tax, billed monthly with no lock-in. Keep ChatGPT and add Nylon, and you pay for both.
Can I try Nylon before I buy?
Book a demo and watch Nylon answer questions from your own work. Plans are billed monthly per user, and you can cancel anytime. ChatGPT has a free tier.
Does Nylon work inside ChatGPT, Claude or Copilot?
Yes, with an Adviser or Elite seat, as long as your assistant’s plan and workspace settings allow connectors. Through Nylon’s AI connector, those assistants search Nylon’s library and cite the source.
Can a firm trust Nylon with client work?
Nylon has SOC 2 Type I and Type II reports and ISO 27001 and ISO 42001 certification. Data is encrypted in transit and at rest, and your inputs never train AI models.
Read next
Nylon for accounting firms
How firms use Nylon for research, drafting and review.
Tax research benchmark
Six AI systems graded against expert answers, on tax questions from outside the US.
Nylon for ChatGPT
Cited Nylon research inside ChatGPT.
Plans and prices
Starter, Adviser and Elite, billed monthly per user. Cancel anytime, no lock-in.
Information about ChatGPT and the other products comes from their own websites as of October 31, 2026 and can change. All prices are in US dollars; Nylon’s exclude sales tax, and other vendors’ prices are as listed on their websites. ChatGPT, GPT and OpenAI are trademarks of OpenAI, and other product names belong to their owners. Nylon isn’t affiliated with or endorsed by OpenAI or any of those owners. Spotted something out of date? Email support@usenylon.com.