Model · GPT-6 Astra
Updated · By llmwise, AI-assisted. Other companies' plans checked .
Does ChatGPT Plus include GPT-6 Astra?
As of September 25, 2026, not in regular chat: ChatGPT Plus offers GPT-6 Astra only in Work and Codex, with an estimated 5–45 local messages every 5 hours. llmwise has Astra in the chat on Pro and higher plans: up to 31 messages a month on Pro ($20), shown before you send.
Checked : OpenAI Help Center.
Where GPT-6 Astra is in ChatGPT
OpenAI's plans, in one sentence each, with the pages that say so.
ChatGPT Plus offers GPT-6 Astra only in Work and Codex, not in ChatGPT's regular chat.
Checked : OpenAI Help Center.
In Work and Codex, OpenAI estimates 5–45 local GPT-6 Astra messages every 5 hours on Plus, and says these aren't fixed limits and weekly limits may also apply.
Checked : OpenAI Help Center.
In ChatGPT's regular chat, Astra appears as “GPT-6 Pro”, on eligible Pro, Business and Enterprise plans, not on Plus.
Checked : OpenAI Help Center.
GPT-6 Sol and GPT-6 Luna, which OpenAI launched on September 22, 2026, aren't yet available in ChatGPT's Chat mode.
So on ChatGPT Plus you can reach Astra in Work and Codex, within a 5-hour range that moves, but not in the chat you use every day. To chat with it in ChatGPT, you need an eligible ChatGPT Pro, Business or Enterprise plan.
GPT-6 Astra in llmwise, plan by plan
Pro and higher plans have GPT-6 Astra in the chat, next to every other model; Plus doesn't. The picker shows how many Astra messages you have left before you send.
| Plan | Price | GPT-6 Astra |
|---|---|---|
| Free | $0 | Not in the trial |
| Plus | $10 a month | Not on Plus |
| Pro | $20 a month | Up to 31 a month |
| Max | $50 a month | Up to 100 a month |
| Ultra | $100 a month | Up to 225 a month |
| Studio | $200 a month | Up to 500 a month |
Prices don't include tax, which is added where it applies and shown before you pay. A paid plan's month is one allowance shared by every model, so each monthly count is the most you get if all of it goes to that model. It renews each billing period; everyday models refill daily at 00:00 UTC. Long chats count more per reply. How pricing works.
Fair use is published too: $3.75 (Plus), $7.50 (Pro), $20 (Max), $42 (Ultra), $85 (Studio) of AI cost a month. At typical sizes every message on a plan fits under it; outsize messages and research runs use it up sooner. Every limit, explained.
Astra shares each plan's monthly allowance with the other models: on Pro, up to 31 Astra messages, or 125 on GPT-6 Sol, or 31 on Claude Fable 5.1, or any mix. GPT-6 Luna's 60 a day come on top.
On Pro and higher plans, a $10 top-up (+ applicable tax, shown before you pay) adds up to 25 more Astra messages, and lasts 12 months.
Past 64k tokens of conversation, each Astra reply counts as 2 Astra messages, and past 128k as 4. You see it in the message box first; a chat stops at 200k.
GPT-6 Astra, Sol or Luna?
All three GPT-6 models are in llmwise, in the same chat as every other family.
GPT-6 Astra
OpenAI's flagship model. Use it when an answer has to be right the first time: 31 messages a month on Pro, about $0.0750 a typical message at OpenAI's price.
GPT-6 Sol
Strong reasoning for coding and agentic work. 125 messages a month on Pro, on paid plans; about $0.0150 a typical message at OpenAI's price.
GPT-6 Luna
Small, fast, and inexpensive. An everyday model: 60 messages a day on Pro, counted apart from the monthly allowance, so it never uses up your Astra messages.
| Model | On Pro | On Free | Context window | Images | PDFs | Reasoning | API price per 1M, in / out |
|---|---|---|---|---|---|---|---|
| GPT-6 AstraOpenAI | 31/mo on Pro | No | 1.05M tokens | Yes | Whole file | Yes | $10.00 / $50.00 |
| GPT-6 SolOpenAI | 125/mo on Pro | No | 1.05M tokens | Yes | Whole file | Yes | $2.00 / $10.00 |
| GPT-6 LunaOpenAI | 60/day on Pro | No | 1.05M tokens | Yes | Whole file | Yes | $0.10 / $0.50 |
What $20 a month gets you
The three biggest $20 plans against llmwise Pro, as of September 25, 2026.
| What | ChatGPT Plus ($20) | Claude Pro ($20) | Google AI Pro ($19.99) | llmwise Pro ($20) |
|---|---|---|---|---|
| GPT-6 Astra | Not in regular chat: only in Work and Codex | No | No | In the chat: up to 31 a month |
| Claude Fable 5.1 | No | Outside the plan's limits: paid separately | No | Included: up to 31 a month |
| Limit published as a number | No: an estimated 5–45 local Astra messages every 5 hours | No: 5-hour sessions and a weekly cap | No: compute-based since May 17, 2026 | Yes: per model, shown before you send |
| AI families in one chat | 1 (GPT) | 1 (Claude) | 1 (Gemini) | 8 |
| Messages on one AI, if it's all you use (our reading) | More | More | More | Fewer |
Other plans as of September 25, 2026; they can change without notice. Want the most messages from one AI? Its own plan is better value. Want the right AI for each question, with the count up front? That's llmwise.
Checked : OpenAI Help Center, Anthropic Help Center (Fable on your plan), Claude pricing, Anthropic Help Center (Pro plan usage), Google Gemini Help (compute-based limits) and PCWorld.
Monthly list prices as of September 2026: ChatGPT Plus, Claude Pro, Google AI Pro.
How Astra in llmwise differs from ChatGPT
In llmwise, a message to GPT goes to its maker, OpenAI, or through OpenRouter when llmwise can't reach the maker directly. It's the same GPT-6 Astra.
It reasons at medium effort and shows a summary of its reasoning. A reply can be up to 8,000 tokens on Pro and 16,000 on Max and up; at the limit it offers Continue.
No voice, no Codex and none of ChatGPT's own apps. Images are made in Create: on paid plans with models such as GPT Image, Nano Banana and FLUX.2, and on Free with open models such as Z-Image and Qwen-Image.
When ChatGPT Plus is the better buy
If GPT is the only AI you use and you chat all day, ChatGPT Plus gives you more of it for the money, plus voice and OpenAI's apps. If your GPT-6 work is coding, Plus includes Astra in Codex. And if you want Astra in a regular chat next to Claude, Gemini and the rest, with your count shown before you send, that's what llmwise is for. More on that in the ChatGPT alternative page.
GPT-6 Astra and ChatGPT Plus: questions
Does ChatGPT Plus include GPT-6 Astra?
Only in Work and Codex, as of September 25, 2026: OpenAI's Help Center describes Plus access there, with an estimated 5–45 local Astra messages every 5 hours. Astra isn't in ChatGPT's regular chat on Plus.
Which ChatGPT plans have Astra in regular chat?
Eligible Pro, Business and Enterprise plans, where it appears as “GPT-6 Pro”, according to OpenAI's Help Center (as of September 25, 2026). Plus doesn't have GPT-6 Pro in Chat.
Is GPT-6 Sol in ChatGPT?
Not in its Chat mode yet, as of September 25, 2026: OpenAI launched GPT-6 Sol and Luna on September 22, 2026. In llmwise, GPT-6 Sol gets up to 125 messages a month on Pro and GPT-6 Luna 60 a day, on paid plans.
Can I try GPT-6 Astra for free?
No: Free is a one-time trial of 5 messages on Claude Haiku 5.5, with no card. GPT-6 Astra, GPT-6 Sol and GPT-6 Luna are on paid plans.
Is it the real GPT-6 Astra?
Yes: it's OpenAI's model, reached through OpenAI's API, or through OpenRouter when llmwise can't reach OpenAI directly. It reasons at medium effort, OpenAI's own default for it, with llmwise's instructions rather than ChatGPT's.
GPT-6 Astra in a regular chat
Up to 31 GPT-6 Astra messages a month on llmwise Pro ($20), in the same chat as Claude, Gemini and the rest.