Model vs model
GPT-6 Astra vs GPT-6 Sol
GPT-6 Astra and GPT-6 Sol are both in llmwise. What each gets on every plan, what it reads, how it's served and what happens when its provider fails, from the catalog and the code that runs them.
Model prices and specs checked against OpenRouter's GPT-6 Astra page, OpenRouter's GPT-6 Sol page.
Short answer
GPT-6 Sol gets four times as many messages: up to 125 messages a month on Pro, against up to 31 messages a month for GPT-6 Astra. Otherwise, only GPT-6 Sol is in the free trial.
GPT-6 Astra and GPT-6 Sol on every plan
Whether the one-time free trial reaches each model, then each paid plan's messages on it.
| Plan | Price | GPT-6 Astra | GPT-6 Sol |
|---|---|---|---|
| Free | $0 | Not in the trial | In the one-time trial of 5 messages |
| Pro | $20 a month | Up to 31 a month | Up to 125 a month |
| Max | $50 a month | Up to 100 a month | Up to 400 a month |
| Ultra | $100 a month | Up to 225 a month | Up to 900 a month |
| Studio | $200 a month | Up to 500 a month | Up to 2,000 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.
Every limit is published. Paid plans also have a monthly fair-use limit on AI cost: 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.
What differs
Messages on Pro
GPT-6 Sol gets four times as many messages: up to 125 messages a month on Pro, against up to 31 messages a month for GPT-6 Astra.
Context window
Both take up to 1.05M tokens of context. A chat in llmwise holds up to 200k tokens, which fits in either, so the difference shows only through each maker's own API.
Images and PDFs
Both read images. Both take a PDF as the whole file, pages and all.
On Free
GPT-6 Sol is in the free trial; GPT-6 Astra needs a paid plan.
Where messages go
Both are GPT models, served the same way. Sent to OpenAI directly.
Fact by fact
| Fact | GPT-6 Astra | GPT-6 Sol |
|---|---|---|
| Context window | 1.05M tokens | 1.05M tokens |
| Reads images | Yes | Yes |
| PDFs | Whole file | Whole file |
| Reasoning | Yes | Yes |
| API price (September 2026) | $10.00 in / $50.00 out per million tokens | $2.00 in / $10.00 out per million tokens |
| A typical message at API prices (4,000 tokens in, 700 out) | $0.0750 | $0.0150 |
| A $10 top-up adds | 25 messages | 100 messages |
| Where a message goes | Sent to OpenAI directly. | Sent to OpenAI directly. |
| If the provider fails | If OpenAI fails before the reply starts (an overload, a server error, a dropped connection), llmwise sends the same request to GPT-6 Astra through OpenRouter instead. | If OpenAI fails before the reply starts (an overload, a server error, a dropped connection), llmwise sends the same request to GPT-6 Sol through OpenRouter instead. |
| Anthropic's safety fallback | Doesn't apply | Doesn't apply |
GPT-6 Astra or GPT-6 Sol?
From the facts above, not from benchmarks: the rest is how their answers suit your work, which one chat can show you.
Pick GPT-6 Sol: more messages for the money, up to 125 messages a month on Pro; you can try it in the free trial.
Try GPT-6 Astra and GPT-6 Sol on your own question
Start a chat on GPT-6 Astra and ask a real question from your work, with any files it needs.
Switch the model picker to GPT-6 Sol and ask for its answer to the same question. It sees the whole chat, including GPT-6 Astra's answer.
Compare the two on what matters to you: accuracy, tone, length, how much you'd have to fix. If it's close, ask each a follow-up.
The badge by each model in the picker shows what a message uses before you send it.
Each model's page, the families, and other pairs
GPT-6 Astra vs GPT-6 Sol is one pair of models. The page below covers the whole family.
- GPT-6 Astra: price, limits and messages on every plan
- GPT-6 Sol: price, limits and messages on every plan
- Does ChatGPT Plus include GPT-6 Astra?
- Claude Fable 5.1 vs GPT-6 Astra
- Claude Opus 5.5 vs GPT-6 Astra
- GPT-6 Astra vs Grok 4.7
- Claude Opus 5.5 vs GPT-6 Sol
- Every model-vs-model page
Both are made by the same company, so they're served the same way.
Questions
Is GPT-6 Astra or GPT-6 Sol cheaper in llmwise?
GPT-6 Sol gets four times as many messages: up to 125 messages a month on Pro, against up to 31 messages a month for GPT-6 Astra. Every paid plan's monthly allowance is shared by all models, so each count is the most you get if it all goes to that model.
Can I try GPT-6 Astra and GPT-6 Sol for free?
GPT-6 Sol is, in the free trial of 5 messages; GPT-6 Astra needs a paid plan.
Which has the bigger context window, GPT-6 Astra or GPT-6 Sol?
Neither: both take 1.05M tokens. A chat in llmwise holds up to 200k tokens, which fits in either, so the difference shows only through each maker's own API.
Can I use GPT-6 Astra and GPT-6 Sol in the same chat?
Yes. Pick GPT-6 Astra for one message and GPT-6 Sol for the next; the second sees the whole chat, including the first one's answer.
Claude, GPT, Gemini, DeepSeek, Grok, Kimi, and GLM, 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.