Model vs model
GPT-6.1 Terra vs GLM 5.3
GPT-6.1 Terra and GLM 5.3 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-6.1 Terra page, OpenRouter's GLM 5.3 page. Updated .
Short answer
They cost the same in llmwise: up to 250 messages a month on Pro on either. Otherwise, only GPT-6.1 Terra reads images and only GPT-6.1 Terra reads a PDF as the whole file. In our test runs, GPT-6.1 Terra passed 48 of the 50 prompts both answered and GLM 5.3 48; 4 prompts split them, most on customer support (3 to 5).
GPT-6.1 Terra vs GLM 5.3, prompt by prompt
Every prompt GPT-6.1 Terra and GLM 5.3 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-6.1 Terra passed 2, only GLM 5.3 passed 2, and neither passed 0. GPT-6.1 Terra answered sooner on 6 of the 50 and GLM 5.3 on 38; the rest were within 10% of each other. The 50 replies cost $0.0345 on GPT-6.1 Terra and $0.0364 on GLM 5.3: about the same for both.
The 4 prompts only one of GPT-6.1 Terra and GLM 5.3 passed
Argue both sides of free buses (writing): GPT-6.1 Terra passed and GLM 5.3 didn't. GPT-6.1 Terra: Graded 4.0 of 5 on average (lowest 4). GLM 5.3: Graded 3.7 of 5 on average (lowest 3); but a paragraph of 92 words, over the 90 allowed.
An article in three bullets (summarization): GPT-6.1 Terra passed and GLM 5.3 didn't. GPT-6.1 Terra: Graded 4.7 of 5 on average (lowest 4). GLM 5.3: Graded 4.3 of 5 on average (lowest 3); but 68 words, over the 60 allowed.
A late order (customer support): GLM 5.3 passed and GPT-6.1 Terra didn't. GPT-6.1 Terra: Graded 3.7 of 5 on average (lowest 1). GLM 5.3: Graded 5.0 of 5 on average (lowest 5).
A frustrated customer (customer support): GLM 5.3 passed and GPT-6.1 Terra didn't. GPT-6.1 Terra: Graded 3.3 of 5 on average (lowest 2). GLM 5.3: Graded 4.7 of 5 on average (lowest 4).
Job by job, the widest gaps first
Customer support: GPT-6.1 Terra passed 3 of 5 and GLM 5.3 5 of 5. GLM 5.3 answered 1.1× sooner at the median, 2.6 s against 2.3 s. GLM 5.3 cost 1.4× less, $0.0032 against $0.0023 for the 5 replies. GLM 5.3's replies ran 97% longer, in tokens of reply, thinking not counted.
Summarization: GPT-6.1 Terra passed 5 of 5 and GLM 5.3 4 of 5. GLM 5.3 answered 1.4× sooner at the median, 1.5 s against 1.1 s. GLM 5.3 cost 1.2× less, $0.0032 against $0.0027 for the 5 replies. Their replies ran to about the same length.
Writing: GPT-6.1 Terra passed 5 of 5 and GLM 5.3 4 of 5. GLM 5.3 answered 1.4× sooner at the median, 2.5 s against 1.8 s. They cost about the same, $0.0031 against $0.0029 for the 5 replies. GLM 5.3's replies ran 27% longer, in tokens of reply, thinking not counted.
Data analysis: GPT-6.1 Terra passed 5 of 5 and GLM 5.3 5 of 5. GLM 5.3 answered 1.3× sooner at the median, 2.4 s against 1.9 s. GPT-6.1 Terra cost 2.4× less, $0.0041 against $0.0096 for the 5 replies. GLM 5.3's replies ran 100% longer, in tokens of reply, thinking not counted.
SQL: GPT-6.1 Terra passed 5 of 5 and GLM 5.3 5 of 5. GLM 5.3 answered 1.3× sooner at the median, 1.5 s against 1.2 s. GLM 5.3 cost 1.9× less, $0.0031 against $0.0016 for the 5 replies. GPT-6.1 Terra's replies ran 17% longer, in tokens of reply, thinking not counted.
Math: GPT-6.1 Terra passed 5 of 5 and GLM 5.3 5 of 5. GLM 5.3 answered 2.0× sooner at the median, 1.9 s against 0.9 s. GLM 5.3 cost 1.5× less, $0.0027 against $0.0018 for the 5 replies. Their replies ran to about the same length.
Agents and tool use: GPT-6.1 Terra passed 5 of 5 and GLM 5.3 5 of 5. GLM 5.3 answered 1.7× sooner at the median, 1.5 s against 0.9 s. They cost about the same, $0.0024 against $0.0022 for the 5 replies. Their replies ran to about the same length.
Coding: GPT-6.1 Terra passed 5 of 5 and GLM 5.3 5 of 5. GLM 5.3 answered 4.3× sooner at the median, 4.6 s against 1.1 s. They cost about the same, $0.0068 against $0.0073 for the 5 replies. GLM 5.3's replies ran 24% longer, in tokens of reply, thinking not counted.
RAG and answering from documents: GPT-6.1 Terra passed 5 of 5 and GLM 5.3 5 of 5. GLM 5.3 answered 1.6× sooner at the median, 1.0 s against 0.6 s. They cost about the same, $0.0024 against $0.0025 for the 5 replies. GLM 5.3's replies ran 10% longer, in tokens of reply, thinking not counted.
Translation: GPT-6.1 Terra passed 5 of 5 and GLM 5.3 5 of 5. GLM 5.3 answered 1.9× sooner at the median, 3.1 s against 1.6 s. They cost about the same, $0.0036 against $0.0035 for the 5 replies. GLM 5.3's replies ran 52% longer, in tokens of reply, thinking not counted.
All 50 prompts: who passed, who answered sooner, who cost less
| Prompt | Result | Sooner | Cheaper |
|---|---|---|---|
| Turn a title into a URL slug | Both passed | GLM 5.3, 5.5×took 2.4 s and 0.4 s | GPT-6.1 Terra, 1.6×cost $0.0006 and $0.0010 |
| Parse a duration like “1h 30m” | Both passed | GLM 5.3, 5.2×took 5.5 s and 1.1 s | GLM 5.3, 1.3×cost $0.0018 and $0.0014 |
| Merge overlapping intervals | Both passed | GLM 5.3, 3.0×took 2.5 s and 0.8 s | GPT-6.1 Terra, 1.3×cost $0.0006 and $0.0008 |
| Evaluate an arithmetic expression, no eval | Both passed | GPT-6.1 Terra, 2.7×took 4.6 s and 12.5 s | GLM 5.3, 1.2×cost $0.0020 and $0.0017 |
| Parse CSV with quoted fields | Both passed | GLM 5.3, 1.8×took 4.7 s and 2.6 s | GPT-6.1 Terra, 1.4×cost $0.0017 and $0.0024 |
| Announce a second bakery shop on LinkedIn | Both passed | Closetook 2.9 s and 2.9 s | GLM 5.3, 1.9×cost $0.0007 and $0.0004 |
| Rewrite corporate jargon in plain words | Both passed | GLM 5.3, 1.2×took 2.2 s and 1.8 s | GLM 5.3, 3.7×cost $0.0008 and $0.0002 |
| Decline a meeting and offer two times | Both passed | GLM 5.3, 1.8×took 2.5 s and 1.4 s | GLM 5.3, 1.7×cost $0.0005 and $0.0003 |
| A product announcement with five rules | Both passed | GLM 5.3, 1.7×took 1.4 s and 0.8 s | GPT-6.1 Terra, 1.7×cost $0.0004 and $0.0008 |
| Argue both sides of free buses | Only GPT-6.1 Terra | GLM 5.3, 1.9×took 3.3 s and 1.8 s | GPT-6.1 Terra, 1.7×cost $0.0007 and $0.0013 |
| A discount, then sales tax | Both passed | GLM 5.3, 1.2×took 1.2 s and 0.9 s | GLM 5.3, 1.9×cost $0.0004 and $0.0002 |
| Pens at 3 for $4 | Both passed | GLM 5.3, 2.1×took 3.1 s and 1.5 s | GLM 5.3, 3.2×cost $0.0006 and $0.0002 |
| Compound interest over three years | Both passed | GLM 5.3, 4.5×took 2.6 s and 0.6 s | Closecost $0.0005 and $0.0005 |
| Four-digit numbers whose digits sum to 9 | Both passed | GPT-6.1 Terra, 1.1×took 1.7 s and 1.9 s | GLM 5.3, 2.5×cost $0.0006 and $0.0003 |
| The highest of three dice is a 5 | Both passed | GLM 5.3, 2.2×took 1.9 s and 0.9 s | Closecost $0.0006 and $0.0006 |
| An article in three bullets | Only GPT-6.1 Terra | GPT-6.1 Terra, 1.8×took 1.5 s and 2.8 s | GLM 5.3, 1.3×cost $0.0006 and $0.0004 |
| An email thread in one sentence | Both passed | GLM 5.3, 2.8×took 2.9 s and 1.0 s | GLM 5.3, 1.9×cost $0.0004 and $0.0002 |
| Decisions and action items from a meeting | Both passed | GLM 5.3, 1.7×took 2.6 s and 1.5 s | GLM 5.3, 4.1×cost $0.0010 and $0.0002 |
| A quarterly memo for the CEO | Both passed | GLM 5.3, 1.3×took 1.4 s and 1.1 s | GPT-6.1 Terra, 1.5×cost $0.0007 and $0.0010 |
| A study with a negative result | Both passed | GLM 5.3, 1.5×took 1.2 s and 0.8 s | GPT-6.1 Terra, 1.6×cost $0.0005 and $0.0008 |
| The region with the most revenue | Both passed | GLM 5.3, 1.2×took 2.4 s and 2.1 s | GLM 5.3, 1.7×cost $0.0007 and $0.0004 |
| Average order value in August | Both passed | GLM 5.3, 1.1×took 2.2 s and 1.9 s | GLM 5.3, 1.7×cost $0.0006 and $0.0004 |
| Revenue change from July to August | Both passed | GLM 5.3, 1.7×took 2.3 s and 1.4 s | GPT-6.1 Terra, 1.9×cost $0.0008 and $0.0016 |
| A median, filtered two ways | Both passed | GLM 5.3, 2.7×took 2.5 s and 1.0 s | GPT-6.1 Terra, 1.9×cost $0.0006 and $0.0011 |
| Correlation between ad spend and sign-ups | Both passed | GPT-6.1 Terra, 1.7×took 3.3 s and 5.6 s | GPT-6.1 Terra, 4.5×cost $0.0014 and $0.0062 |
| A late order | Only GLM 5.3 | Closetook 2.6 s and 2.6 s | GLM 5.3, 1.7×cost $0.0007 and $0.0004 |
| A return inside the window | Both passed | Closetook 1.7 s and 1.6 s | GLM 5.3, 2.2×cost $0.0005 and $0.0002 |
| A frustrated customer | Only GLM 5.3 | GLM 5.3, 1.2×took 2.7 s and 2.3 s | GLM 5.3, 2.0×cost $0.0006 and $0.0003 |
| A refund request outside the window | Both passed | GLM 5.3, 2.6×took 2.9 s and 1.1 s | GPT-6.1 Terra, 1.3×cost $0.0007 and $0.0009 |
| A message with a planted instruction | Both passed | GPT-6.1 Terra, 2.2×took 2.4 s and 5.3 s | GLM 5.3, 1.5×cost $0.0007 and $0.0005 |
| A delivery message into Spanish | Both passed | GLM 5.3, 2.2×took 3.3 s and 1.5 s | GLM 5.3, 3.3×cost $0.0008 and $0.0002 |
| A product description into French | Both passed | GLM 5.3, 2.0×took 2.9 s and 1.5 s | GLM 5.3, 2.4×cost $0.0007 and $0.0003 |
| A meeting note into German | Both passed | GLM 5.3, 1.9×took 3.1 s and 1.6 s | GLM 5.3, 3.5×cost $0.0006 and $0.0002 |
| Idioms into natural Japanese | Both passed | Closetook 1.8 s and 1.7 s | GPT-6.1 Terra, 1.9×cost $0.0006 and $0.0012 |
| A lease clause into Brazilian Portuguese | Both passed | GLM 5.3, 2.0×took 3.5 s and 1.7 s | GPT-6.1 Terra, 1.9×cost $0.0009 and $0.0016 |
| Customers in one country | Both passed | GLM 5.3, 1.2×took 0.9 s and 0.8 s | GLM 5.3, 2.9×cost $0.0004 and $0.0001 |
| Count orders by status | Both passed | Closetook 1.2 s and 1.2 s | GLM 5.3, 2.9×cost $0.0004 and $0.0001 |
| Revenue by category | Both passed | GLM 5.3, 1.2×took 1.5 s and 1.2 s | GLM 5.3, 2.6×cost $0.0005 and $0.0002 |
| Every customer, even those without orders | Both passed | GLM 5.3, 1.6×took 1.6 s and 1.0 s | GPT-6.1 Terra, 1.3×cost $0.0005 and $0.0007 |
| Monthly revenue with a running total | Both passed | GLM 5.3, 1.3×took 4.3 s and 3.2 s | GLM 5.3, 3.1×cost $0.0012 and $0.0004 |
| A fact from one section | Both passed | GLM 5.3, 1.2×took 1.0 s and 0.9 s | GLM 5.3, 1.7×cost $0.0005 and $0.0003 |
| Core hours and start times | Both passed | GLM 5.3, 1.9×took 1.0 s and 0.5 s | GPT-6.1 Terra, 1.5×cost $0.0005 and $0.0007 |
| Two sections in one answer | Both passed | GLM 5.3, 1.9×took 1.0 s and 0.5 s | Closecost $0.0005 and $0.0005 |
| A later amendment changes the answer | Both passed | GLM 5.3, 1.5×took 2.0 s and 1.3 s | Closecost $0.0005 and $0.0006 |
| A question the handbook doesn't answer | Both passed | GLM 5.3, 2.2×took 1.4 s and 0.6 s | Closecost $0.0004 and $0.0005 |
| Pick the tool and work out the date | Both passed | GLM 5.3, 1.7×took 1.5 s and 0.9 s | GLM 5.3, 2.0×cost $0.0004 and $0.0002 |
| Convert a currency | Both passed | Closetook 1.2 s and 1.1 s | GLM 5.3, 2.8×cost $0.0004 and $0.0001 |
| Book a meeting from a sentence | Both passed | GPT-6.1 Terra, 1.2×took 1.5 s and 1.7 s | Closecost $0.0005 and $0.0006 |
| Search, but don't book | Both passed | GLM 5.3, 3.7×took 2.0 s and 0.5 s | Closecost $0.0005 and $0.0005 |
| Two calls with a unit conversion | Both passed | GLM 5.3, 2.9×took 2.1 s and 0.7 s | GPT-6.1 Terra, 1.4×cost $0.0005 and $0.0008 |
GPT-6.1 Terra vs GLM 5.3 in our test runs
GPT-6.1 Terra and GLM 5.3 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-6.1 Terra | GLM 5.3 |
|---|---|---|
| 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 | 4 of 5 |
| Data analysis | 5 of 5 | 5 of 5 |
| Customer support | 3 of 5 | 5 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 · $0.0007 a reply | 48 of 50 · 1 message each · $0.0007 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, customer support: both replies to a prompt only one of them passed.
An everyday prompt: “A late order”, in full.
GPT-6.1 Terra
Failed: Graded 3.7 of 5 on average (lowest 1).
Hi, I’m sorry your rain jacket hasn’t arrived yet. Standard delivery normally takes 3–5 business days, so I understand your concern. Could you please send me your order number? I’ll look into its status and see what’s causing the delay. Sam, Northwind support
685 tokens in, 124 out (60 of them reasoning) · 2.6 s · $0.0007 · 1 message on Pro · answered by openai/gpt-6.1-terra via OpenAI ·
GLM 5.3
Passed: Graded 5.0 of 5 on average (lowest 5).
Hi, I'm sorry your rain jacket still hasn't arrived — that's well past our standard 3–5 business day delivery window, and I understand how frustrating that is. I'd like to look into where your package is right away. Could you reply with your order number so I can check its status and tracking? If it's lost or stuck in transit, we'll sort out a replacement or solution for you. Also, because your order is more than 7 business days late, you're entitled to free express shipping on your next order — I'll make sure that's applied to your account. Thanks for your patience, and again, apologies for the delay. Sam, Northwind support
529 tokens in, 163 out (21 of them reasoning) · 2.6 s · $0.0004 · 1 message on Pro · answered by z-ai/glm-5.3 via Baidu ·
GPT-6.1 Terra and GLM 5.3 on every plan
Each plan's messages on it. Every plan starts with a 2-day free trial.
| Plan | Price | GPT-6.1 Terra | GLM 5.3 |
|---|---|---|---|
| Plus | $10 a month | Up to 125 a month | Up to 125 a month |
| Pro | $20 a month | Up to 250 a month | Up to 250 a month |
| Max | $50 a month | Up to 800 a month | Up to 800 a month |
| Ultra | $100 a month | Up to 1,800 a month | Up to 1,800 a month |
| Studio | $200 a month | Up to 4,000 a month | Up to 4,000 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: 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.
What differs
Messages on Pro
They cost the same in llmwise: up to 250 messages a month on Pro on either.
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
GLM 5.3 doesn't read images. GLM 5.3 gets a PDF's text rather than the file itself.
Free trial
GPT-6.1 Terra and GLM 5.3 are both in the 2-day free trial of Plus or Pro.
Where messages go
GPT-6.1 Terra: Sent to OpenAI directly. GLM 5.3: Served through OpenRouter, only by hosts that don't store or train on prompts. The maker's own endpoint is never asked.
Fact by fact
| Fact | GPT-6.1 Terra | GLM 5.3 |
|---|---|---|
| Context window | 1.05M tokens | 1.05M tokens |
| Reads images | Yes | No |
| PDFs | Whole file | Text only |
| Reasoning | Yes | Yes |
| API price (October 2026) | $1.00 in / $5.00 out per million tokens | $1.40 in / $4.40 out per million tokens |
| A typical message at API prices (4,000 tokens in, 700 out) | $0.0075 | $0.0087 |
| A $10 top-up adds | 200 messages | 200 messages |
| Where a message goes | Sent to OpenAI directly. | Served through OpenRouter, only by hosts that don't store or train on prompts. The maker's own endpoint is never asked. |
| 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-6.1 Terra through OpenRouter instead. | When one host is down, OpenRouter moves the request to another host that meets the same rules. |
| Anthropic's safety fallback | Doesn't apply | Doesn't apply |
GPT-6.1 Terra or GLM 5.3?
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 Terra: it reads images; it reads a PDF as the whole file, charts and scans included; it costs its maker less to run ($0.0075 a typical message at API prices), though in llmwise the count is the same.
Each model's page, the families, and other pairs
GPT-6.1 Terra vs GLM 5.3 is one pair of models. The page below covers the whole families.
- GPT-6.1 Terra: price, limits and messages on every plan
- GLM 5.3: price, limits and messages on every plan
- ChatGPT vs GLM
- GPT-6.1 Sol vs GPT-6.1 Terra
- GPT-6.1 Terra vs GPT-6 Luna
- GPT-6.1 Terra vs Claude Haiku 4.5
- GLM 5.3 vs GLM 5.3 Flash
- Kimi K3 vs GLM 5.3
- DeepSeek V4 Pro vs GLM 5.3
- Every model-vs-model page
GPT-6.1 Terra is a GPT model; GLM 5.3 is a GLM model.
Questions
Is GPT-6.1 Terra or GLM 5.3 cheaper in llmwise?
They cost the same in llmwise: up to 250 messages a month on Pro on either. Every paid plan's monthly allowance is shared by the models on it, so each count is the most you get if it all goes to that model.
Can I try GPT-6.1 Terra and GLM 5.3 for free?
For 2 days, yes: GPT-6.1 Terra and GLM 5.3 are both in the 2-day free trial of Plus or Pro. Add a card at checkout; cancel before the trial ends and you pay nothing. One free trial per person.
Which has the bigger context window, GPT-6.1 Terra or GLM 5.3?
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-6.1 Terra and GLM 5.3 in the same chat?
Yes. Pick GPT-6.1 Terra for one message and GLM 5.3 for the next; the second sees the whole chat, including the first one's answer.
Which did better in your test runs, GPT-6.1 Terra or GLM 5.3?
On the same 50 prompts, run on October 27, 2026, GPT-6.1 Terra passed 48 and GLM 5.3 passed 48. The table on this page has each job, and every reply is published.
Claude, GPT, Gemini, DeepSeek, Grok, Kimi, GLM, and Mistral, in one chat.
See what a message costs before you send it. Every plan starts with a 2-day free trial. Sign in with an email link, no password; cancel before the trial ends and you pay nothing.