GPT-6: What’s New, Free vs Paid, India Price and Intelligent UI (2026 Guide)

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GPT-6 is OpenAI’s newest model family, now inside ChatGPT for free and paid users with a new feature called Intelligent UI that answers with interactive calculators, charts and tables. This GPT-6 guide explains which GPT-6 model you get, what it costs in India, and how to use it well.
By Sougan Kumar Mandi, founder of Peplio and Digital Marketing Executive at Demech Chemical Products Last updated: October 29, 2026  ·  Next update: Monday, November 2, 2026  ·  Updated every Monday
Quick Answer

GPT-6 is a family of OpenAI models: Astra (most capable), Sol (everyday work), Luna (fast and cheap) and the newer GPT-6.1 Terra. Since October 7 to 8, 2026, paid ChatGPT plans use GPT-6 Sol and Free and Go users get GPT-6 Luna, all with Intelligent UI. In India, Go is ₹399, Plus ₹1,999 and Pro ₹19,900 a month. Use the tools below to see which GPT-6 model your plan gets, when your free Go year ends, and what the GPT-6 API would cost you.

Every week, readers ask me the same questions about GPT-6: is it free, which version do I have, and is it worth paying for in India? I use ChatGPT daily for Peplio and at work, so I built this page to answer those questions with sourced facts and working tools instead of hype. It is a living hub: I update it every Monday as OpenAI changes GPT-6, and the update log shows what changed.
GPT-6 PulseUPDATED WEEKLY · Week of Oct 26, 2026
Oct 26, 2026
GPT-6.1 Terra released
A mid-tier model with sharper visual reasoning, precise computer use and more natural writing. API price $1 input and $5 output per million tokens, half of GPT-6.1 Sol.
For you: Plus, Pro, Enterprise and Edu users get Terra in ChatGPT Work and Codex. Developers can cut costs by switching from Sol.
Source: AI Weekly
Oct 7 to 8, 2026
GPT-6 and Intelligent UI roll out in ChatGPT
Paid plans get GPT-6 Sol from October 7. Free and Go get GPT-6 Luna from October 8. Answers can now include calculators, charts, diagrams and small games.
For you: try the Intelligent UI prompts below, and always check the numbers in generated calculators.
Sources: FindSkill, Layer3 Labs
Oct 21, 2026
ChatGPT ads reach 89 countries
Ads appear only on the Free and Go plans.
For you: marketers can now reach GPT-6 users with ads. See our ChatGPT Ads India guide.
Source: The Next Web
1.05Mtoken context window on Astra, Sol and Luna
$0.10per 1M input tokens on GPT-6 Luna (API)
₹399ChatGPT Go per month in India
Oct 8Free users start getting GPT-6 Luna
In this guide
  1. GPT-6 models explained
  2. Which GPT-6 do I get? (plan checker)
  3. When does my free ChatGPT Go end?
  4. Intelligent UI and prompts that trigger it
  5. GPT-6 API cost calculator
  6. 10-step GPT-6 checklist
  7. Free Excel, PDF and infographics
  8. FAQ

GPT-6 Models Explained: Astra, Sol, Luna and Terra

ModelBest forWhere you get itAPI price per 1M tokens (in / out)
GPT-6 AstraHardest, longest, tool-heavy workPro reasoning option, API$10 / $50
GPT-6 SolEveryday reasoning, coding, agentsPlus, Pro, Business, Enterprise Chat$2 / $10
GPT-6.1 TerraVisual reasoning, computer use, natural writingWork and Codex for Plus, Pro, Enterprise, Edu$1 / $5
GPT-6 LunaFast, high-volume tasksFree and Go Chat, API$0.10 / $0.50

Sources: Developers Digest, Free Press Journal, AI Weekly, FindSkill. Astra, Sol and Luna have a 1,050,000-token context window.

GPT-6 models explained infographic: Astra, Sol, Luna and GPT-6.1 Terra with uses and API prices
GPT-6 models explained. Free to use on your site, slides or social posts with credit.
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Which GPT-6 Do I Get? Check Your Plan

India prices: Free Press Journal (Go, Plus, Pro, payable by UPI). Business per-seat price from a pricing guide, so confirm on OpenAI.

Infographic: which GPT-6 model each ChatGPT plan gets and the price in India
GPT-6 by ChatGPT plan, with India prices. Free to use on your site, slides or social posts with credit.
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When Does My Free ChatGPT Go End?

OpenAI made ChatGPT Go free for one year for Indian users from November 4, 2025. Each account got 12 months from the day it claimed the offer. Enter your claim date to see when your free GPT-6 access on Go ends.
Peplio AI Visibility Tracker

Does ChatGPT mention your brand when people ask about your niche? Check for free.

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GPT-6 Intelligent UI: What It Is and Prompts That Trigger It

Intelligent UI lets ChatGPT answer with interactive elements such as calculators, charts, diagrams, bill splitters and small games. ChatGPT decides when a visual format fits and uses plain text otherwise. There is no separate limit: it uses your plan’s normal limits. It does not work with the Astra Pro reasoning option, in the Work tab, in Codex or in Voice, and older desktop apps need an update.These prompts usually produce an interactive answer. Click copy and replace the brackets:
Make an EMI calculator for a ₹[amount] loan at [rate]% interest for [years] years
Build a bill splitter for [number] friends with these expenses: [list]
Show a chart of my monthly spending: rent [x], food [y], travel [z], other [w]
Compare
,
and
in an interactive table by price, features and ratings
Make a 10-question quiz on [topic] for beginners with instant answers
Create a SIP calculator: ₹[amount] a month for [years] years at [rate]% expected return

Check the maths. One reviewer recalculated OpenAI’s own retirement-calculator example and got the same result, but no published audit shows how often generated calculators are right. Verify formulas before acting on money decisions.

GPT-6 API Cost Calculator

For developers and marketers building with the GPT-6 API. Enter your monthly token use in millions.

Get the Most From GPT-6: 10-Step Checklist

Tick each step as you finish it. Your progress saves in your browser.
Progress: 0 / 10 done
  • Update your app or use the web, so Intelligent UI works.
  • Check your model with the plan checker above.
  • Note your free Go end date if you claimed the India offer, and set a reminder.
  • Review data controls: on personal plans, chats may train models unless you opt out in settings.
  • Try 3 Intelligent UI prompts from this page.
  • Verify any calculator before using its numbers for money decisions.
  • Use the right thinking level: Instant for quick answers, higher levels for complex work.
  • Try the Simple layout in Personalization if visuals get in your way.
  • Developers: compare Terra vs Sol with the API calculator before switching.
  • Bookmark this page for weekly GPT-6 updates.
Infographic: GPT-6 Intelligent UI explained with 6 prompts that create interactive answers
GPT-6 Intelligent UI in one page. Free to use on your site, slides or social posts with credit.
Download image
Use this infographic on your site

Free GPT-6 Templates (Excel, PDF and Infographics)

Free for students, creators, marketers and developers. No signup needed. Use them, share them, and link back if they help you.
EXCELGPT-6 Plan and API Cost Planner

Compare plans in rupees, estimate API costs for every GPT-6 model, and track your free Go end date.

Download Excel
PDF30 Intelligent UI Prompts

Prompts for money, study, shopping, business and marketing that create interactive answers.

Download PDF
PDFGPT-6 Cheat Sheet

Models, plans, India prices, API rates, limits and privacy settings on one printable page.

Download PDF
IMAGES3 Shareable Infographics

Models explained, plans and India prices, and Intelligent UI prompts. Free for blogs, slides and classes.

See the infographics

Bloggers and teachers: you are welcome to share these templates. Please credit and link to Peplio’s GPT-6 guide.

GPT-6 Mistakes to Avoid

Do not
  • Trust a generated calculator for loans or investments without checking
  • Forget your free Go end date
  • Paste private customer data on a personal plan
  • Use Astra in the API when Terra or Sol is enough
Do
  • Check formulas and assumptions
  • Set a reminder before your Go year ends
  • Review data controls in settings
  • Pick the cheapest model that does the job
Sougan’s Take

For most Indian users, free GPT-6 Luna is enough. Pay only when you hit a real limit.

The biggest GPT-6 change for normal users is not the model name, it is Intelligent UI: answers you can click and adjust. For students, small businesses and creators, Free or Go covers daily work. Plus at ₹1,999 makes sense when you use ChatGPT every working day and need GPT-6 Sol or Terra in Work and Codex. Pro is for heavy professional use only.

Intelligent UI Accuracy Check (Community Table)

Do GPT-6’s generated calculators get the maths right? Here is what has been checked publicly so far. Test one yourself and share your result to get credited.
Who checkedCalculatorResult
FindSkillOpenAI’s retirement example ($500/month, 30 years, 5%)Matched: $416,129
Your test could be the next row
Peplio Free AEO Checker

GPT-6 answers cite websites. Check if your page is easy for AI to quote.

Check my page

Update Log

  • October 29, 2026: Hub launched with the GPT-6 Pulse, model table, plan checker, free Go end-date tool, Intelligent UI prompts, API cost calculator, checklist, accuracy table, 3 templates and 3 infographics.
New to Peplio’s comics? Start with Episode 1: Marketing Lessons Through Comics. Like GPT-6, the lesson is simple: the right prompt and plan beat the most expensive tool.
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Summary
  • GPT-6 includes Astra, Sol, Luna and the newer GPT-6.1 Terra.
  • Paid ChatGPT plans use GPT-6 Sol; Free and Go use GPT-6 Luna, all with Intelligent UI.
  • India prices: Go ₹399, Plus ₹1,999, Pro ₹19,900 a month, payable by UPI.
  • Free Go years claimed from November 4, 2025 start ending in November 2026.
  • Always check generated calculators before using their numbers.
People Also Asked

Is GPT-6 free?

Yes. Free ChatGPT users get GPT-6 Luna with Intelligent UI, with usage limits. Paid plans get GPT-6 Sol. See how OpenAI’s agents compare in our ChatGPT Dots guide.

Is GPT-6 the same as ChatGPT Dots?

No. GPT-6 is the model; Dots are always-on agents inside ChatGPT that run on GPT-6 models. Compare plans in ChatGPT Dots price in India.

How can my website appear in GPT-6 answers?

Make your pages easy to cite with clear answers, data and sources. Start with our generative engine optimization guide.

FAQ About GPT-6

What is GPT-6?GPT-6 is OpenAI’s model family released in September 2026, including GPT-6 Astra, GPT-6 Sol, GPT-6 Luna and the newer GPT-6.1 Sol and GPT-6.1 Terra.
Is GPT-6 free in ChatGPT?Yes. Free and Go users started getting GPT-6 Luna with Intelligent UI from October 8, 2026. Paid plans use GPT-6 Sol.
What is GPT-6 Intelligent UI?Intelligent UI lets ChatGPT answer with interactive calculators, charts, diagrams and small games when they fit the question, without any special prompt.
How much does GPT-6 cost in India?Through ChatGPT, Go costs ₹399, Plus ₹1,999 and Pro ₹19,900 a month, payable by UPI. Free users also get GPT-6 Luna.
What is the GPT-6 API price?Per million tokens: Astra $10 input and $50 output, Sol $2 and $10, GPT-6.1 Terra $1 and $5, Luna $0.10 and $0.50.
When does free ChatGPT Go end in India?Each account got 12 months from the day it claimed the offer, which started November 4, 2025. The earliest claims end in early November 2026.
Data sources and transparency

Fact check: rollout dates match in FindSkill and Layer3 Labs. API prices match in Developers Digest and Free Press Journal (Sol, Luna) and AI Weekly (Terra). India plan prices from Free Press Journal; the free Go offer from Business Today. The Business per-seat price comes from a single guide and is marked as such.

All data as of October 29, 2026. Peplio is not affiliated with OpenAI and receives no commission. Rupee API estimates use an example exchange rate.

Sources for this GPT-6 guide: FindSkill on GPT-6 and Intelligent UI, Layer3 Labs on GPT-6 Luna, Developers Digest GPT-6 models, Free Press Journal on Sol and Luna, AI Weekly on GPT-6.1 Terra, Free Press Journal on India pricing, Business Today on free ChatGPT Go, ChatGPT India pricing guide, The Next Web, Position Digital.
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GPT-6: Key Takeaways

GPT-6 is now the default inside ChatGPT. Free and Go users get GPT-6 Luna, paid plans get GPT-6 Sol, Pro adds GPT-6 Astra, and GPT-6.1 Terra powers Work and Codex. Every GPT-6 plan includes Intelligent UI, which turns answers into interactive tools.For Indian users, GPT-6 is easy to try because GPT-6 Luna is free. Pay for GPT-6 Sol on Plus only when you need it every day. If you claimed free ChatGPT Go, note your end date, because GPT-6 on Go costs ₹399 a month after your free year.Bookmark this GPT-6 hub. It is updated every Monday with new GPT-6 models, prices and features, so you always know what GPT-6 can do and what it costs today.