GPT-6 is OpenAI’s model generation that followed GPT-5 in September 2026. GPT-6 Astra is its most capable model for complex reasoning, coding and research. GPT-6 Sol and GPT-6.1 Sol focus on complex coding and agentic work, GPT-6.1 Terra on visual reasoning and natural writing, and GPT-6 Luna is the efficient model for focused, high-volume tasks.

Is GPT-6 the same as ChatGPT 6?

ChatGPT is OpenAI’s app, and GPT-6 is the model generation behind its newest versions. On Sparkian you use GPT-6 models directly, in the same chat as 100+ other models.

Which GPT-6 model is best?

It depends on the job. GPT-6 Luna is free and handles everyday questions and high-volume tasks. GPT-6.1 Terra suits visual reasoning and natural writing, GPT-6.1 Sol complex coding and agentic work, and GPT-6 Astra, OpenAI’s most capable GPT-6 model, the hardest reasoning and research.

Yes. GPT-6 Luna is free to try every day. Sign up to keep your chats. GPT-6.1 Sol, GPT-6 Sol, GPT-6 Astra and GPT-6.1 Terra need the Pro plan.

What is the latest GPT-6 model?

GPT-6.1 Terra is the newest GPT-6 model on Sparkian, released October 26, 2026.

How much does GPT-6 cost?

GPT-6 Luna starts at 1 Spark per message and GPT-6.1 Sol at 15 Sparks per message. The Pro plan is $19 a month with 10,000 Sparks, about 666 GPT-6.1 Sol messages. Top-ups work on every plan.

How do I access GPT-6.1 Sol and other Pro models?

Sign up, choose the Pro plan and pick GPT-6.1 Sol, GPT-6 Sol, GPT-6 Astra and GPT-6.1 Terra in the chat box. No OpenAI account or API key is needed.

How does GPT-6 compare with Claude Haiku, DeepSeek and Gemini?

Try them side by side. Turn on Compare models in the chat box, add up to three more models and send one prompt to all of them. Each answer uses that model’s Sparks.

Can GPT-6 read images and files?

Yes. GPT-6 models read images and files, and you can attach PDFs, Word documents, spreadsheets and images to any GPT-6 chat.

GPT-6 | Sparkian

What GPT-6 is good at

GPT-6 is good at quick rewrites, side-by-side comparisons and spreadsheet formulas. In our tests, GPT-6 Luna turned a blunt complaint into a polite two-sentence request, compared email, chat and meetings for team updates in a table before recommending a chat channel with a short weekly meeting, and wrote a correct COUNTIFS formula for paid orders over 100.

Rewrite a message

Rewrite this message so it is clear and polite, in under 80 words: "The report you sent is missing the March numbers again. I need it by tomorrow or the client call is pointless."

GPT-6 Luna

The report is missing the March figures.

Compare options

Compare email, a chat channel and a weekly meeting for sharing project updates with a 10-person team. Use a short table and end with one recommendation.

GPT-6 Luna

Email
Chat channel
Weekly meeting: Decisions, dependencies and issues that need discussion

Write a formula

Write a Google Sheets formula that counts rows where column B is "Paid" and column C is over 100, then explain it in one sentence.

GPT-6 Luna

Google Sheets

=COUNTIFS(B:B,"Paid",C:C,">100")

Compare options

Answered November 11, 2026, shown unedited

Compare email, a chat channel and a weekly meeting for sharing project updates with a 10-person team. Use a short table and end with one recommendation. Keep your answer under 180 words, with code where useful.

GPT-6 Luna

Method	Strengths	Limitations	Best for
Email	Clear, searchable record; reaches everyone	Can get long; replies may fragment	Formal decisions and detailed summaries
Chat channel	Fast, easy to ask questions; updates stay in one place	Noisy; important details can get buried	Quick progress, blockers, and day-to-day coordination
Weekly meeting	Rich discussion; helps resolve complex issues	Takes 10 people’s time; not everyone needs every update	Decisions, dependencies, and issues that need discussion

Recommendation: Use a dedicated chat channel for routine updates, with a brief weekly meeting for blockers and decisions; send email only for formal summaries or decisions that need a durable record.

Write a formula

Answered November 11, 2026, shown unedited

Write a Google Sheets formula that counts rows where column B is "Paid" and column C is over 100, then explain it in one sentence. Keep your answer under 180 words, with code where useful.

GPT-6 Luna

=COUNTIFS(B:B,"Paid",C:C,">100")

This counts rows where column B is “Paid” and the corresponding value in column C is greater than 100.

Luna’s rewrite dropped that the March numbers were missing again, so check that a softened message keeps the facts that matter. Three sample prompts tested live by Chandan Kumar on November 11, 2026. Answers are unedited and regenerated for every new model.

GPT-6 models and pricing

GPT-6 Luna costs the least, from 1 Sparks per message. GPT-6 Sol costs the most, from 15.

Model	Speed	Reasoning	Context	Sparks	Plan	Est. messages a month on Pro
GPT-6.1 Terra Latest	Fast	Advanced	128K	Sparks8+	Pro	≈1,250
GPT-6.1 Sol	Standard	Advanced	1M	Sparks15+	Pro	≈666
GPT-6 Luna	Fast	Basic	1M	Sparks1+	Free	≈10,000
GPT-6 Sol	Standard	Advanced	1M	Sparks15+	Pro	≈666
GPT-6 Astra	Standard	Advanced	128K	Sparks10+	Pro	≈1,000

Sparks are per message and start at the amount shown. Monthly counts are estimates; longer chats and attached files use more.

All plans

GPT-6 Luna specs

Context window

tokens

The largest on Sparkian is 1.1M tokens. Attached files count toward it.

Sparks per message

Free to try every day.

Est. messages a month on Pro

≈10,000

$19 a month with 10,000 Sparks included.

Inputs: Text, Images
Outputs: Text, Code
Web tools: Search and read websites
Files: PDFs, docs, sheets and slides
Released: September 22, 2026
Access: Free
Speed: Fast
Reasoning: Basic

GPT-6 release dates

GPT-6.1 Terra is the newest GPT-6 model, released October 26, 2026. You can use all 5 versions on Sparkian.

October 26, 2026
GPT-6.1 Terra Latest
Context window
128K tokens
Sparks
Sparks8+
Access
Pro
September 29, 2026
GPT-6.1 Sol
Context window
1M tokens
Sparks
Sparks15+
Access
Pro
September 22, 2026
GPT-6 Luna
Context window
1M tokens
Sparks
Sparks1+
Access
Free
September 22, 2026
GPT-6 Sol
Context window
1M tokens
Sparks
Sparks15+
Access
Pro
September 4, 2026
GPT-6 Astra
Context window
128K tokens
Sparks
Sparks10+
Access
Pro

Why use GPT-6 on Sparkian

Compare GPT-6 with Claude Haiku and DeepSeek
See how GPT-6 holds up against other models in one prompt.
One plan, 100+ models
No separate subscription per provider.
Research with sources
Web search and reading, cited.
Images and teams
Generate in chat, share projects.