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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 accountants and tax advisers 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 at 24 October 2026. Nylon’s prices are marked A$, NZ$ or £ and exclude GST or VAT. ChatGPT’s are OpenAI’s US list prices before tax, and OpenAI says it localises some prices. Sources are further down the page.
ChatGPT
Nylon
Based on
What the model learned in training, plus web pages when it searches
Australian, New Zealand and UK tax legislation and revenue authority guidance, plus Australian and New Zealand case law and UK tax decisions
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Sometimes, when it searches; OpenAI says they can be incomplete, outdated or incorrect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 US$20 a month; Business Standard US$20–US$25 per user a month
39, 99 or 199 per user a month in A$, NZ$ or £
Scope
Any subject, with deep research, file uploads and apps
Tax and law, plus drafting and document review
Pick Nylon when a tax answer has to trace back to legislation, revenue authority guidance or a decision. Pick ChatGPT when you mostly need a general assistant for writing and day-to-day tasks. 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 at 24 October 2026. CCH and Elfworks prices are in A$.
Nylon
Cited answers from Australian, New Zealand and UK primary sources, in Nylon or your AI assistant
Yes, on all plans
39, 99 or 199 per user a month in A$, NZ$ or £
CCH iKnowConnect
Wolters Kluwer’s Master Tax Guide, commentary and practical tools (Australian edition shown)
Yes
A$97.45–A$351.50 a month incl. GST, up to 3 users (new customers)
Thomson Reuters Checkpoint
Commentary by tax writers, news and compliance kits
Not described on its Australian product page
By quote
Lexis+ with Protégé
Wide-ranging legal research with CaseBase citation checks
Yes
By quote
Elfworks
Australian advice drafting, workflow agents and CPD logging
Yes
Free plan; A$59 or A$250 a month
Claude, Gemini or Copilot on their own
Fast drafting when no one has to trace a source
When they search the web
Free and paid tiers
Where Nylon differs from ChatGPT on tax questions
As at 24 October 2026. ChatGPT is fast, covers everything and drafts well. Nylon is narrower on purpose: tax answers you can follow back to the law, available inside ChatGPT as well.
Grounded in three countries’ primary sources
Nylon answers from Australian, New Zealand and UK tax legislation and revenue authority guidance, plus Australian and New Zealand case law and UK tax decisions, and links each citation to its source. ChatGPT relies on its training and, if it searches, the web. OpenAI’s help centre says its search results and citations “can be incomplete, outdated, or incorrect”.
Tested on CPA Program tax questions
Nylon’s October 2026 benchmark used 91 Australian tax questions from the CPA Program. Nylon scored 4.68 out of 5 and OpenAI’s GPT-6 Astra 4.28. GPT-6 Astra ran through OpenAI’s API with the benchmark’s shared web-search tool, not through the ChatGPT app, and had a cap of 20 tool calls per question; the Claude and Gemini models had none.
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 Australian, New Zealand and UK primary sources
Nylon answers tax questions for Australia, New Zealand and the UK, and law questions for Australia and New Zealand, from legislation, revenue authority guidance and court and tribunal decisions. Every citation links to the source.
Every source one click away
Each answer links its citations to the legislation, guidance or decision it relies on, so you can read the wording yourself.
Three-country library
Australian and New Zealand tax and law, and UK tax: legislation, ATO, Inland Revenue and HMRC guidance, and court and tribunal decisions.
Advice drafts and document review
Turn research into a first-draft advice letter, memo or tax opinion, or upload a client’s documents and ask what they mean for the matter.
Works where you already work
With an Adviser or Elite seat, Claude, ChatGPT and Microsoft Copilot can search Nylon’s library through its AI connector.
Pricing
Starter A$39, Adviser A$99 and Elite A$199 per user a month, ex GST; the same figures apply in NZ$ in New Zealand, and in £ ex VAT in the UK. Billed monthly; cancel anytime. Enterprise pricing on request.
Nylon
When is a private company loan to a shareholder a deemed dividend under Division 7A?
A loan to a shareholder or their associate is treated as an unfranked dividend unless it is repaid, or put on a complying loan agreement, before the company’s lodgment day for the year the loan was made [1][2].
1
Income Tax Assessment Act 1936, s 109D
2
Income Tax Assessment Act 1936, s 109N
Illustrative example
Benchmark · October 2026
4.68 / 5
Nylon’s composite score on 91 CPA Program Australia Taxation questions, each graded by an AI judge against an expert reference answer, without being told which system wrote it.
Nylon
4.68
Claude Fable 5.1
4.32
GPT-6 Astra
4.28
Australian tax, compared with five general AI models run through their providers’ APIs from 28 September to 1 October 2026. OpenAI’s two models had a limit of 20 tool calls per question; Claude and Gemini had none. Neither the ChatGPT app nor specialist tools were tested.
ChatGPT and Nylon, feature by feature
Facts as at 24 October 2026. Everything in the ChatGPT column is taken from OpenAI’s website and help centre.
Where you use it
Inside ChatGPT, with apps for services such as Google Drive, Slack and SharePoint. Apps that reach internal tools need Plus or higher.
Nylon on the web, plus Claude, ChatGPT and Microsoft Copilot through its AI connector on Adviser and Elite seats.
Contract
Plus and Pro renew monthly and can be cancelled at any time. Business is monthly or annual with at least 2 seats; annual seats are committed for the full term.
Month to month, cancel whenever you like.
Price (before tax)
Free tier. Plus is US$20 a month; Pro starts at US$100 a month. Business Standard is US$25 per user a month, or US$20 if billed annually. Enterprise is through sales. These are US prices, and OpenAI says they may differ by country.
39, 99 or 199 per user a month in A$, NZ$ or £, ex GST or VAT. 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: Australian and New Zealand tax and law, and UK tax: legislation, ATO, Inland Revenue and HMRC guidance, and court and tribunal decisions.
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 primary source.
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.
Tax legislation and guidance from Australia, New Zealand and the UK, in a single library; law for Australia and New Zealand.
Tools
Deep research, projects, uploads of up to 512 MB per file, and apps.
Deep research on Adviser and Elite. Drafts advice letters, research memos and tax opinions, and reads the client documents you upload.
Security
Business: SOC 2 Type 2. Enterprise and Edu add ISO/IEC 27001 and 27701. OpenAI lists ISO/IEC 42001 for its AI management system too.
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 Australian, New Zealand and UK legislation, guidance and decisions
Nothing you enter is used to train AI models, whatever the plan
One library for three countries’ tax legislation and guidance
Cited answers from inside ChatGPT, Claude and Microsoft Copilot (Adviser and Elite)
What you give up
ChatGPT’s free tier, and Plus at US$20 a month
An all-purpose assistant for writing and tasks on any subject
ChatGPT apps for services such as Google Drive, Slack and SharePoint
Put your ChatGPT tax questions to Nylon
Pick three tax questions you’ve asked ChatGPT recently. We’ll run them through Nylon in a demo, so you can check every answer against its sources.
More tax research alternatives to ChatGPT
Summaries drawn from each vendor’s own website, as at 24 October 2026. Prices in A$.
2
CCH iKnowConnect
Wolters Kluwer’s research platform for tax and law; its Australian edition carries the Australian Master Tax Guide, over 600 practical tools, and AI answers that Wolters Kluwer says come with citations and footnotes.
Best for
Practices that rely on CCH commentary, guides and practical tools.
Pricing
In Australia, A$97.45, A$251.85 or A$351.50 a month incl. GST for up to 3 users. These are Wolters Kluwer’s online packages for new small firms, with a 12-month minimum term that renews automatically. Quote for 4 or more users.
Consider it if
You want calculators and expert commentary next to AI answers.
3
Thomson Reuters Checkpoint
A tax research service from Thomson Reuters, with expert commentary linked to legislation, rulings and cases, the Weekly Tax Bulletin, and calculators, workpapers and checklists.
Best for
Practices that want expert-written commentary and compliance kits.
Pricing
By quote.
Consider it if
Human-written commentary matters more to you than AI answers; the Australian product page doesn’t describe AI answers.
4
Lexis+ with Protégé
LexisNexis’s AI for legal research and drafting, called Lexis+ AI until March 2026. In Australia it works from primary law, commentary and CaseBase citation analysis, and links each answer to its sources.
Best for
Barristers and law firms with wide-ranging legal research.
Pricing
By quote; trial on request.
Consider it if
Most of your work is legal, not tax; its Australian pages are aimed at legal practices, not accountants.
5
Elfworks
AI for Australian accountants covering tax research, advice drafting and workflow agents, with answers cited against legislation, ATO rulings and case law.
Best for
Practices wanting advice drafting, trust and FBT workflows and CPD logging in a single tool.
Pricing
Free plan; Professional A$59 a month; Firm A$250 a month for any number of users sharing 600 credits a month (ex GST). Paid plans free for 30 days.
Consider it if
You want one flat price for a bigger team.
6
Claude, Gemini or Copilot on their own
General assistants from Anthropic, Google and Microsoft. Like ChatGPT, they answer from training data and, when they use it, web search.
Best for
Drafting and getting your bearings when no one has to trace the answer.
Pricing
Free and paid tiers.
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 at 24 October 2026. Start from the work you do most often.
If 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. Monthly billing.
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, summarise and brainstorm
ChatGPT
An all-purpose assistant for any subject, with a free tier.
If your team relies on publisher commentary
CCH iKnowConnect or Checkpoint
Master Tax Guides, expert commentary and practical tools.
If most of your work is legal
Lexis+ with Protégé
Wide-ranging legal research with CaseBase.
If you want workflows for drafting advice
Elfworks
Workflow agents, CPD logging and a flat Firm fee for any number of users, for Australian tax.
Security evidence you can ask for
Independent audits and certifications: SOC 2 Type I and Type II, 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 organisational controls come with every plan.
Baqir Hussein, FCCA · Founder & Director, Finex Chartered Certified Accountants (UK)
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 at 24 October 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”. With any AI, Nylon included, the advice stays your responsibility. Australia’s Tax Practitioners Board, for one, says in its AI guidance (TPB(GS) 55/2026, July 2026) that AI “cannot be relied on as a replacement for tax knowledge, experience or expertise”. Nylon links each answer to the legislation, guidance or decision behind it, so you can check the source yourself.
Is ChatGPT accurate for tax questions?
OpenAI says ChatGPT “can make mistakes”, and no AI tool gets everything right, Nylon included. Nylon’s October 2026 benchmark put 91 CPA Program Australia Taxation questions to six systems between 28 September and 1 October 2026: OpenAI’s GPT-6 Astra scored 4.28 out of 5 and GPT-6 Sol 3.96, and Nylon 4.68. Both OpenAI models ran through its API rather than the ChatGPT app, with the benchmark’s shared web-search tool and no system prompt, and both had a limit of 20 tool calls per question that the Claude and Gemini models didn’t. GPT-6 Sol reached the limit on 52 of the 91 questions and GPT-6 Astra on 7, so their scores may understate them, and results in ChatGPT may differ. As at 24 October 2026, OpenAI says GPT-6, powered by GPT-6 Sol, is rolling out as the default in ChatGPT’s Chat for eligible Plus, Pro, Business and Enterprise users, with GPT-6 Astra behind its GPT-6 Pro option.
What is the best alternative to ChatGPT for tax research?
If you need answers cited to Australian, New Zealand or UK primary sources, Nylon: it links each answer to the legislation, guidance or decision, 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 practical tools, CCH iKnowConnect or Thomson Reuters Checkpoint. For legal research, Lexis+ with Protégé. For Australian advice drafting workflows at a flat firm price, Elfworks.
Does ChatGPT use my clients’ data to train its models?
That depends on your plan. As at 24 October 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 at 24 October 2026, OpenAI lists ChatGPT Plus at US$20 a month and Pro from US$100 a month, and Business Standard at US$25 per user a month, or US$20 billed annually, with at least 2 seats. Those are US prices before tax, and OpenAI says they may differ by country; there’s also a free tier. Nylon is 39, 99 or 199 per user a month in A$, NZ$ or £, before GST or VAT, billed monthly. 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 monthly, and you can cancel whenever you like. 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
91 Australian tax questions, six systems, graded against expert answers.
Nylon for ChatGPT
Cited Nylon research inside ChatGPT.
Plans and prices
Starter, Adviser and Elite, priced per user and billed monthly.
Apart from Nylon’s own benchmark, information about ChatGPT and the other products comes from their own websites as at 24 October 2026 and can change. Nylon’s prices are marked A$, NZ$ or £, OpenAI’s US$, and other prices are in Australian dollars. ChatGPT, GPT and OpenAI are trade marks of OpenAI, and other product names belong to their owners. Nylon isn’t affiliated with or endorsed by OpenAI or any of those owners. Nylon’s October 2026 benchmark ran OpenAI’s GPT-6 Astra and GPT-6 Sol through OpenAI’s API, not the ChatGPT app, with a limit of 20 tool calls per question that the Claude and Gemini models didn’t have, and didn’t test the other products on this page. Spotted something out of date? Email support@usenylon.com.