Free GPT-6 chat
GPT-6 chat: Astra, Sol, and Luna
GPT-6 Luna, the smallest GPT-6, passed 47 of 50 of our test prompts. GPT-6 Astra, GPT-6.1 Sol, GPT-6 Sol, and GPT-6 Luna are on paid plans; the free message with no account is answered by Claude Haiku 5.5, and the 5 free messages you get on sign-up are on Claude Haiku 5.5.
A real answer from our test runs
GPT-6 LunaHow many four-digit positive integers have digits that add up to 9? Show your working briefly, then end with a line that says "Final answer: " followed by the answer alone.
GPT-6 Luna · passed our check · September 27, 2026
Let the first digit be at least 1. Subtract 1 from it, so the four digits become nonnegative integers summing to 8. By stars and bars, there are \(\binom{8+4-1}{4-1}=\binom{11}{3}=165\) possibilities.
Final answer: 165GPT-6 Luna needs a paid plan; the 5 free messages on sign-up are on Claude Haiku 5.5.
Start freeFacts about other apps checked against ChatGPT pricing. Updated .
Short answer
Claude Haiku 5.5 answers the free message when the box shows, and the 5 free messages on sign-up reach . GPT-6 Astra, GPT-6.1 Sol, GPT-6 Sol, and GPT-6 Luna needs a paid plan.
The three GPT-6 models
Which are free to try, what each counts as, and how each did on our prompts.
| Model | Free trial | On Pro | Typical message, API price | Our test prompts passed |
|---|---|---|---|---|
| GPT-6 AstraOpenAI | No | 31 a month | $0.0750 | 48 of 50 (20 of 20 hard) |
| GPT-6.1 SolOpenAI | No | 125 a month | $0.0150 | 46 of 50 (19 of 20 hard) |
| GPT-6 SolOpenAI | No | 125 a month | $0.0150 | 45 of 50 (19 of 20 hard) |
| GPT-6 LunaOpenAI | No | 60 a day | $0.0008 | 47 of 50 (20 of 20 hard) |
On Pro: the most messages a month on the model if the month goes to it alone, or a day's on an everyday model. The API price is a 4,000-token question with a 700-token answer at the model's list price as of October 2026; in llmwise you pay per message. Our tests: the 50 prompts of our test runs on October 15, 2026.
Every limit is published. Paid plans also have a monthly fair-use limit on AI cost: Plus $3.75, Pro $7.50, Max $20, Ultra $42, Studio $85. Using every message on your plan at typical sizes stays under it; very large messages and heavy research use it faster. Every limit, explained.
Where Claude Haiku 5.5 fell short
Claude Haiku 5.5 passed 45 of 50 of our prompts, 19 of 20 hard ones. These are the ones it didn't pass:
- Rewrite corporate jargon in plain words (Writing, everyday): Graded 3.3 of 5 on average (lowest 2).
- Argue both sides of free buses (Writing, hard): Graded 4.0 of 5 on average (lowest 4); but a paragraph of 103 words, over the 90 allowed.
- An article in three bullets (Summarization, everyday): Graded 3.7 of 5 on average (lowest 3); but 61 words, over the 60 allowed.
- An email thread in one sentence (Summarization, everyday): Graded 4.3 of 5 on average (lowest 4); but 39 words, over the 30 allowed.
- A frustrated customer (Customer support, everyday): Graded 3.3 of 5 on average (lowest 3).
The free model against the dearer two
The same everyday customer support prompt, “A late order”, sent to GPT-6 Astra, GPT-6 Sol, and GPT-6 Luna: GPT-6 Astra failed, GPT-6 Sol failed, and GPT-6 Luna passed.
The prompt: A late order (everyday)
Northwind Outfitters support policy - Returns: within 30 days of delivery, unworn items with tags get a full refund to the original payment method. - After 30 days and up to 60 days: exchange or a store gift card only, no refund. - Refunds are paid within 5 business days of the return reaching our warehouse. - Standard delivery takes 3 to 5 business days. If an order is more than 7 business days late, the customer gets free express shipping on their next order. - Staff can't give discount codes worth more than 15%. Customer message: "I ordered a rain jacket 9 business days ago with standard delivery and it still hasn't arrived. Where is it?" Write the reply to the customer, following the policy. At most 150 words, signed "Sam, Northwind support".
GPT-6 Astra
Failed: Graded 3.7 of 5 on average (lowest 1).
I’m sorry your rain jacket hasn’t arrived yet. Standard delivery normally takes 3–5 business days, so this is longer than expected. Please send your order number so we can check the tracking and look into the delay. If you received a shipping confirmation, its tracking link may also show the latest update. Sam, Northwind support
511 tokens in, 143 out (69 of them reasoning) · 4.1 s · $0.0123 · 1 message on Pro · answered by openai/gpt-6-astra via OpenAI ·
GPT-6 Sol
Failed: Graded 3.7 of 5 on average (lowest 1).
Hi, I’m sorry your rain jacket hasn’t arrived. Standard delivery usually takes 3–5 business days, so I understand your concern after 9 business days. Could you send me your order number? I’ll check the tracking and find out where the package is. Sam, Northwind support
511 tokens in, 144 out (78 of them reasoning) · 3.2 s · $0.0025 · 1 message on Pro · answered by openai/gpt-6-sol via OpenAI ·
GPT-6 Luna
Passed: Graded 4.7 of 5 on average (lowest 4).
Hi, I’m sorry your rain jacket hasn’t arrived yet. Standard delivery usually takes 3–5 business days, so your order is now more than 7 business days late. I can’t see live tracking details here, but please share your order number so we can check its status. You’ll also receive free express shipping on your next order. Sam, Northwind support
511 tokens in, 80 out · 1.6 s · $0.0001 · 1 message on Pro · answered by openai/gpt-6-luna via OpenAI ·
GPT-6 in ChatGPT's free plan
OpenAI's own app doesn't include GPT-6 on its Free plan: its pricing table marks GPT-6 Astra, Sol and Luna “No” for Free and Go, and lists them for Plus and Pro. In its words: “GPT-6 Luna: Free: No” (ChatGPT pricing, checked ).
More ways to chat
The other chat pages, each with its own models and test results.
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Questions
Is GPT-6 free here?
No. GPT-6 Astra, GPT-6.1 Sol, GPT-6 Sol, and GPT-6 Luna are on paid plans: GPT-6 Astra gets up to 31 messages a month on Pro. The free message with no account, when its box shows on this page, is answered by Claude Haiku 5.5, and the 5 free messages you get on sign-up are on Claude Haiku 5.5, not GPT-6.
Is this ChatGPT?
No. llmwise isn't ChatGPT and isn't made by or affiliated with OpenAI. It offers OpenAI's GPT-6 models in its own chat, next to Claude, Gemini, Grok, DeepSeek, Kimi and GLM.
Does ChatGPT's free plan include GPT-6?
Not as of September 28, 2026: ChatGPT's pricing page marks GPT-6 Astra, Sol and Luna as not on its Free or Go plans, and lists them for Plus and Pro.
How good is GPT-6 Luna?
In our test runs on October 15, 2026, GPT-6 Luna passed 47 of 50 prompts, including 20 of the 20 hard ones, at about $0.0001 a reply. It's an everyday model: Pro gives 60 messages a day on it.
Claude, GPT, Gemini, DeepSeek, Grok, Kimi, GLM, and Mistral, in one chat.
See what a message costs before you send it. Free is 5 messages to try; sign in with an email link, no password or card.