Model vs model
GPT-6 Astra vs GPT-6.1 Sol
GPT-6 Astra and GPT-6.1 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-6.1 Sol page. Updated .
Short answer
GPT-6.1 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-6.1 Sol is in the free trial. In our test runs, GPT-6 Astra passed 48 of the 50 prompts both answered and GPT-6.1 Sol 46; 2 prompts split them, most on writing (5 to 4).
GPT-6 Astra vs GPT-6.1 Sol, prompt by prompt
Every prompt GPT-6 Astra and GPT-6.1 Sol both answered, compared directly, their biggest differences first. One run each, through OpenRouter: a wait depends on the provider and the load that day, so a lead under 10% counts as close.
Of the 50 prompts both answered, both passed 46, only GPT-6 Astra passed 2, only GPT-6.1 Sol passed 0, and neither passed 2. GPT-6 Astra answered sooner on 5 of the 50 and GPT-6.1 Sol on 38; the rest were within 10% of each other. The 50 replies cost $0.5847 on GPT-6 Astra and $0.0597 on GPT-6.1 Sol: 9.8× less on GPT-6.1 Sol.
The 2 prompts only one of GPT-6 Astra and GPT-6.1 Sol passed
Rewrite corporate jargon in plain words (writing): GPT-6 Astra passed and GPT-6.1 Sol didn't. GPT-6 Astra: Graded 4.0 of 5 on average (lowest 4). GPT-6.1 Sol: Graded 3.7 of 5 on average (lowest 3).
A refund request outside the window (customer support): GPT-6 Astra passed and GPT-6.1 Sol didn't. GPT-6 Astra: Graded 4.7 of 5 on average (lowest 4). GPT-6.1 Sol: Graded 3.7 of 5 on average (lowest 3).
Job by job, the widest gaps first
Writing: GPT-6 Astra passed 5 of 5 and GPT-6.1 Sol 4 of 5. GPT-6.1 Sol answered 1.5× sooner at the median, 4.8 s against 3.3 s. GPT-6.1 Sol cost 9.8× less, $0.0556 against $0.0057 for the 5 replies. Their replies ran to about the same length.
Customer support: GPT-6 Astra passed 3 of 5 and GPT-6.1 Sol 2 of 5. GPT-6.1 Sol answered 1.2× sooner at the median, 3.8 s against 3.2 s. GPT-6.1 Sol cost 9.3× less, $0.0578 against $0.0062 for the 5 replies. Their replies ran to about the same length.
Summarization: GPT-6 Astra passed 5 of 5 and GPT-6.1 Sol 5 of 5. GPT-6.1 Sol answered 1.4× sooner at the median, 2.9 s against 2.0 s. GPT-6.1 Sol cost 10.9× less, $0.0546 against $0.0050 for the 5 replies. Their replies ran to about the same length.
RAG and answering from documents: GPT-6 Astra passed 5 of 5 and GPT-6.1 Sol 5 of 5. GPT-6.1 Sol answered 1.3× sooner at the median, 1.7 s against 1.3 s. GPT-6.1 Sol cost 10.0× less, $0.0394 against $0.0039 for the 5 replies. Their replies ran to about the same length.
SQL: GPT-6 Astra passed 5 of 5 and GPT-6.1 Sol 5 of 5. GPT-6.1 Sol answered 1.3× sooner at the median, 2.2 s against 1.7 s. GPT-6.1 Sol cost 9.9× less, $0.0491 against $0.0049 for the 5 replies. Their replies ran to about the same length.
Math: GPT-6 Astra passed 5 of 5 and GPT-6.1 Sol 5 of 5. GPT-6.1 Sol answered 1.5× sooner at the median, 2.6 s against 1.8 s. GPT-6.1 Sol cost 9.9× less, $0.0427 against $0.0043 for the 5 replies. Their replies ran to about the same length.
Coding: GPT-6 Astra passed 5 of 5 and GPT-6.1 Sol 5 of 5. GPT-6.1 Sol answered 1.7× sooner at the median, 8.2 s against 4.8 s. GPT-6.1 Sol cost 9.7× less, $0.1117 against $0.0115 for the 5 replies. Their replies ran to about the same length.
Data analysis: GPT-6 Astra passed 5 of 5 and GPT-6.1 Sol 5 of 5. Their median waits were close, 3.3 s against 3.0 s. GPT-6.1 Sol cost 9.7× less, $0.0772 against $0.0080 for the 5 replies. Their replies ran to about the same length.
Translation: GPT-6 Astra passed 5 of 5 and GPT-6.1 Sol 5 of 5. GPT-6.1 Sol answered 1.2× sooner at the median, 3.8 s against 3.2 s. GPT-6.1 Sol cost 9.5× less, $0.0628 against $0.0066 for the 5 replies. Their replies ran to about the same length.
Agents and tool use: GPT-6 Astra passed 5 of 5 and GPT-6.1 Sol 5 of 5. GPT-6.1 Sol answered 1.5× sooner at the median, 1.9 s against 1.3 s. GPT-6.1 Sol cost 9.4× less, $0.0340 against $0.0036 for the 5 replies. Their replies ran to about the same length.
All 50 prompts: who passed, who answered sooner, who cost less
| Prompt | Result | Sooner | Cheaper |
|---|---|---|---|
| Turn a title into a URL slug | Both passed | GPT-6.1 Sol, 1.2×took 2.1 s and 1.7 s | GPT-6.1 Sol, 10.0×cost $0.0084 and $0.0008 |
| Parse a duration like “1h 30m” | Both passed | GPT-6.1 Sol, 1.7×took 8.2 s and 4.8 s | GPT-6.1 Sol, 11.6×cost $0.0235 and $0.0020 |
| Merge overlapping intervals | Both passed | GPT-6.1 Sol, 1.3×took 2.6 s and 2.0 s | GPT-6.1 Sol, 10.0×cost $0.0108 and $0.0011 |
| Evaluate an arithmetic expression, no eval | Both passed | GPT-6.1 Sol, 1.5×took 12.0 s and 7.8 s | GPT-6.1 Sol, 10.1×cost $0.0375 and $0.0037 |
| Parse CSV with quoted fields | Both passed | Closetook 9.1 s and 8.4 s | GPT-6.1 Sol, 8.2×cost $0.0314 and $0.0038 |
| Announce a second bakery shop on LinkedIn | Both passed | GPT-6.1 Sol, 1.2×took 4.8 s and 4.2 s | GPT-6.1 Sol, 8.3×cost $0.0111 and $0.0013 |
| Rewrite corporate jargon in plain words | Only GPT-6 Astra | GPT-6.1 Sol, 1.8×took 6.0 s and 3.3 s | GPT-6.1 Sol, 10.8×cost $0.0145 and $0.0013 |
| Decline a meeting and offer two times | Both passed | GPT-6.1 Sol, 1.9×took 3.3 s and 1.8 s | GPT-6.1 Sol, 10.6×cost $0.0079 and $0.0007 |
| A product announcement with five rules | Both passed | GPT-6.1 Sol, 1.7×took 3.3 s and 1.9 s | GPT-6.1 Sol, 9.6×cost $0.0084 and $0.0009 |
| Argue both sides of free buses | Both passed | GPT-6.1 Sol, 1.6×took 7.2 s and 4.6 s | GPT-6.1 Sol, 10.1×cost $0.0137 and $0.0014 |
| A discount, then sales tax | Both passed | GPT-6.1 Sol, 1.3×took 1.9 s and 1.5 s | GPT-6.1 Sol, 10.6×cost $0.0063 and $0.0006 |
| Pens at 3 for $4 | Both passed | Closetook 2.4 s and 2.4 s | GPT-6.1 Sol, 7.9×cost $0.0082 and $0.0010 |
| Compound interest over three years | Both passed | GPT-6.1 Sol, 1.5×took 2.7 s and 1.7 s | GPT-6.1 Sol, 10.0×cost $0.0072 and $0.0007 |
| Four-digit numbers whose digits sum to 9 | Both passed | GPT-6.1 Sol, 1.4×took 3.8 s and 2.7 s | GPT-6.1 Sol, 11.0×cost $0.0122 and $0.0011 |
| The highest of three dice is a 5 | Both passed | GPT-6.1 Sol, 1.5×took 2.6 s and 1.8 s | GPT-6.1 Sol, 10.6×cost $0.0088 and $0.0008 |
| An article in three bullets | Both passed | GPT-6.1 Sol, 2.5×took 5.0 s and 2.0 s | GPT-6.1 Sol, 15.6×cost $0.0143 and $0.0009 |
| An email thread in one sentence | Both passed | Closetook 1.9 s and 1.7 s | GPT-6.1 Sol, 9.9×cost $0.0071 and $0.0007 |
| Decisions and action items from a meeting | Both passed | GPT-6.1 Sol, 1.4×took 3.3 s and 2.3 s | GPT-6.1 Sol, 9.7×cost $0.0123 and $0.0013 |
| A quarterly memo for the CEO | Both passed | GPT-6.1 Sol, 1.2×took 2.9 s and 2.4 s | GPT-6.1 Sol, 9.7×cost $0.0118 and $0.0012 |
| A study with a negative result | Both passed | GPT-6.1 Sol, 1.3×took 2.3 s and 1.7 s | GPT-6.1 Sol, 10.0×cost $0.0091 and $0.0009 |
| The region with the most revenue | Both passed | GPT-6 Astra, 1.2×took 3.3 s and 3.8 s | GPT-6.1 Sol, 9.0×cost $0.0136 and $0.0015 |
| Average order value in August | Both passed | GPT-6.1 Sol, 1.2×took 2.5 s and 2.1 s | GPT-6.1 Sol, 9.4×cost $0.0104 and $0.0011 |
| Revenue change from July to August | Both passed | GPT-6.1 Sol, 1.2×took 3.6 s and 3.0 s | GPT-6.1 Sol, 10.8×cost $0.0150 and $0.0014 |
| A median, filtered two ways | Both passed | Closetook 2.0 s and 1.9 s | GPT-6.1 Sol, 8.8×cost $0.0090 and $0.0010 |
| Correlation between ad spend and sign-ups | Both passed | GPT-6.1 Sol, 1.4×took 8.8 s and 6.5 s | GPT-6.1 Sol, 10.0×cost $0.0294 and $0.0029 |
| A late order | Neither passed | GPT-6.1 Sol, 1.3×took 4.1 s and 3.2 s | GPT-6.1 Sol, 10.8×cost $0.0123 and $0.0011 |
| A return inside the window | Both passed | GPT-6.1 Sol, 1.2×took 2.4 s and 2.0 s | GPT-6.1 Sol, 10.0×cost $0.0087 and $0.0009 |
| A frustrated customer | Neither passed | GPT-6.1 Sol, 1.3×took 3.8 s and 2.9 s | GPT-6.1 Sol, 9.9×cost $0.0120 and $0.0012 |
| A refund request outside the window | Only GPT-6 Astra | GPT-6.1 Sol, 1.5×took 5.0 s and 3.3 s | GPT-6.1 Sol, 9.5×cost $0.0137 and $0.0014 |
| A message with a planted instruction | Both passed | GPT-6 Astra, 1.3×took 2.7 s and 3.4 s | GPT-6.1 Sol, 7.3×cost $0.0112 and $0.0015 |
| A delivery message into Spanish | Both passed | GPT-6.1 Sol, 1.2×took 3.8 s and 3.2 s | GPT-6.1 Sol, 10.0×cost $0.0116 and $0.0012 |
| A product description into French | Both passed | GPT-6 Astra, 1.2×took 2.5 s and 3.0 s | GPT-6.1 Sol, 7.7×cost $0.0093 and $0.0012 |
| A meeting note into German | Both passed | GPT-6.1 Sol, 1.6×took 6.1 s and 3.9 s | GPT-6.1 Sol, 10.8×cost $0.0180 and $0.0017 |
| Idioms into natural Japanese | Both passed | GPT-6.1 Sol, 1.3×took 3.2 s and 2.4 s | GPT-6.1 Sol, 9.8×cost $0.0100 and $0.0010 |
| A lease clause into Brazilian Portuguese | Both passed | GPT-6.1 Sol, 1.4×took 5.3 s and 3.7 s | GPT-6.1 Sol, 9.1×cost $0.0139 and $0.0015 |
| Customers in one country | Both passed | GPT-6.1 Sol, 1.3×took 1.5 s and 1.2 s | GPT-6.1 Sol, 10.0×cost $0.0061 and $0.0006 |
| Count orders by status | Both passed | Closetook 1.4 s and 1.5 s | GPT-6.1 Sol, 9.6×cost $0.0058 and $0.0006 |
| Revenue by category | Both passed | GPT-6.1 Sol, 1.3×took 2.2 s and 1.7 s | GPT-6.1 Sol, 10.0×cost $0.0091 and $0.0009 |
| Every customer, even those without orders | Both passed | GPT-6.1 Sol, 1.6×took 2.9 s and 1.9 s | GPT-6.1 Sol, 10.0×cost $0.0091 and $0.0009 |
| Monthly revenue with a running total | Both passed | GPT-6.1 Sol, 1.5×took 5.8 s and 4.0 s | GPT-6.1 Sol, 10.0×cost $0.0190 and $0.0019 |
| A fact from one section | Both passed | Closetook 1.3 s and 1.3 s | GPT-6.1 Sol, 10.0×cost $0.0073 and $0.0007 |
| Core hours and start times | Both passed | GPT-6.1 Sol, 1.8×took 2.4 s and 1.3 s | GPT-6.1 Sol, 10.0×cost $0.0080 and $0.0008 |
| Two sections in one answer | Both passed | GPT-6.1 Sol, 1.4×took 1.7 s and 1.2 s | GPT-6.1 Sol, 9.9×cost $0.0082 and $0.0008 |
| A later amendment changes the answer | Both passed | GPT-6.1 Sol, 1.6×took 2.1 s and 1.3 s | GPT-6.1 Sol, 10.0×cost $0.0086 and $0.0009 |
| A question the handbook doesn't answer | Both passed | GPT-6 Astra, 1.7×took 1.4 s and 2.4 s | GPT-6.1 Sol, 10.0×cost $0.0073 and $0.0007 |
| Pick the tool and work out the date | Both passed | GPT-6.1 Sol, 1.2×took 1.4 s and 1.2 s | GPT-6.1 Sol, 10.0×cost $0.0060 and $0.0006 |
| Convert a currency | Both passed | GPT-6.1 Sol, 2.4×took 2.9 s and 1.2 s | GPT-6.1 Sol, 10.0×cost $0.0059 and $0.0006 |
| Book a meeting from a sentence | Both passed | Closetook 1.9 s and 1.8 s | GPT-6.1 Sol, 8.8×cost $0.0077 and $0.0009 |
| Search, but don't book | Both passed | GPT-6.1 Sol, 1.2×took 1.5 s and 1.3 s | GPT-6.1 Sol, 10.0×cost $0.0069 and $0.0007 |
| Two calls with a unit conversion | Both passed | GPT-6 Astra, 1.2×took 2.3 s and 2.7 s | GPT-6.1 Sol, 8.6×cost $0.0074 and $0.0009 |
GPT-6 Astra vs GPT-6.1 Sol in our test runs
GPT-6 Astra and GPT-6.1 Sol on the same prompts, job by job: how many replies passed their check.
Based on 100 of our test runs on , through OpenRouter with the app's own prompt and settings. Updated .
| Job | GPT-6 Astra | GPT-6.1 Sol |
|---|---|---|
| Coding | 5 of 5 | 5 of 5 |
| Writing | 5 of 5 | 4 of 5 |
| Math | 5 of 5 | 5 of 5 |
| Summarization | 5 of 5 | 5 of 5 |
| Data analysis | 5 of 5 | 5 of 5 |
| Customer support | 3 of 5 | 2 of 5 |
| Translation | 5 of 5 | 5 of 5 |
| SQL | 5 of 5 | 5 of 5 |
| RAG and answering from documents | 5 of 5 | 5 of 5 |
| Agents and tool use | 5 of 5 | 5 of 5 |
| All jobs | 48 of 50 · 1 message each · $0.0117 a reply | 46 of 50 · 1 message each · $0.0012 a reply |
The same prompts, sent to both through llmwise's own pipeline and checked the same way: five for each job. A bold count is the one that passed more. Messages: what each reply counted as on Pro. Cost: what OpenRouter charged us per reply, on average. Every prompt, and how it's scored.
Where they differed most, writing: both replies to a prompt only one of them passed.
An everyday prompt: “Rewrite corporate jargon in plain words”, in full.
GPT-6 Astra
Passed: Graded 4.0 of 5 on average (lowest 4).
In Q3, teams across departments worked together to shift toward a more customer-focused approach. Among enterprise customers, the initiative increased retention by 12% and reduced the rate at which customers leave by 0.3 percentage points (30 basis points). We also adjusted customer interactions across all channels to make better use of available capacity.
417 tokens in, 206 out (134 of them reasoning) · 6.0 s · $0.0145 · 1 message on Pro · answered by openai/gpt-6-astra via OpenAI ·
GPT-6.1 Sol
Failed: Graded 3.7 of 5 on average (lowest 3).
In the third quarter, teams across departments worked together to put customers first. The initiative increased customer retention by 12% and reduced the rate at which customers leave by 0.3 percentage points (30 basis points) in the enterprise segment. We also adjusted customer contact points across all channels to make better use of available capacity.
419 tokens in, 185 out (113 of them reasoning) · 3.3 s · $0.0013 · 1 message on Pro · answered by openai/gpt-6.1-sol via OpenAI ·
GPT-6 Astra and GPT-6.1 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-6.1 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-6.1 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-6.1 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-6.1 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-6.1 Sol through OpenRouter instead. |
| Anthropic's safety fallback | Doesn't apply | Doesn't apply |
GPT-6 Astra or GPT-6.1 Sol?
From the facts above and our test runs: the rest is how their answers suit your work, which one chat can show you.
Pick GPT-6.1 Sol: more messages for the money, up to 125 messages a month on Pro; you can try it in the free trial.
Each model's page, the families, and other pairs
GPT-6 Astra vs GPT-6.1 Sol is one pair of models. The page below covers the whole family.
- GPT-6 Astra: price, limits and messages on every plan
- GPT-6.1 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 GPT-6 Sol
- GPT-6.1 Sol vs Claude Sonnet 5.5
- GPT-6.1 Sol 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-6.1 Sol cheaper in llmwise?
GPT-6.1 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-6.1 Sol for free?
GPT-6.1 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-6.1 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-6.1 Sol in the same chat?
Yes. Pick GPT-6 Astra for one message and GPT-6.1 Sol for the next; the second sees the whole chat, including the first one's answer.
Which did better in your test runs, GPT-6 Astra or GPT-6.1 Sol?
On the same 50 prompts, run on September 29, 2026, GPT-6 Astra passed 48 and GPT-6.1 Sol passed 46. The table on this page has each job, and every reply is published.
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.