Comparison
DeepSeek vs GLM
On llmwise Pro, DeepSeek V4 Pro up to 250 messages a month and GLM 5.3 up to 250. We ran the same 50 prompts across 10 jobs on every DeepSeek and GLM model and published every reply: each family's pick against the other's job by job, the prompts where they split, then their plans and how the lineups differ.
Based on 200 of our test runs on , through OpenRouter with the app's own prompt and settings. Updated .
Short answer
In our test runs on September 27, 2026, the same 50 prompts across 10 jobs: DeepSeek's 2 models passed 94 of 100 replies and GLM's 2 models passed 88 of 100 replies. Job by job, both families' best models shared the top result on 9 of the 10 jobs; DeepSeek's alone had it on summarization.
DeepSeek vs GLM, job by job
On each job, DeepSeek's pick against GLM's: the model of each family that passed the most of the job's 5 prompts (then the most hard ones, then the cheaper). The jobs where they differ most come first.
Summarization: DeepSeek V4.1 Flash 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. DeepSeek V4.1 Flash cost 3.3× less, $0.0008 against $0.0027 for the 5 replies. Their replies ran to about the same length.
Coding: DeepSeek V4.1 Flash passed 5 of 5 and GLM 5.3 Flash 5 of 5. Their median waits were close, 7.8 s against 8.4 s. GLM 5.3 Flash cost 4.3× less, $0.0054 against $0.0013 for the 5 replies. DeepSeek V4.1 Flash's replies ran 34% longer, in tokens of reply, thinking not counted.
Writing: DeepSeek V4.1 Flash passed 4 of 5 and GLM 5.3 4 of 5. GLM 5.3 answered 1.7× sooner at the median, 3.1 s against 1.8 s. DeepSeek V4.1 Flash cost 2.0× less, $0.0014 against $0.0029 for the 5 replies. Their replies ran to about the same length.
Math: DeepSeek V4.1 Flash passed 5 of 5 and GLM 5.3 Flash 5 of 5. DeepSeek V4.1 Flash answered 1.6× sooner at the median, 1.7 s against 2.7 s. GLM 5.3 Flash cost 1.5× less, $0.0012 against $0.0008 for the 5 replies. Their replies ran to about the same length.
Data analysis: DeepSeek V4.1 Flash passed 5 of 5 and GLM 5.3 5 of 5. GLM 5.3 answered 1.5× sooner at the median, 3.0 s against 1.9 s. DeepSeek V4.1 Flash cost 3.7× less, $0.0026 against $0.0096 for the 5 replies. DeepSeek V4.1 Flash's replies ran 25% longer, in tokens of reply, thinking not counted.
Customer support: DeepSeek V4.1 Flash passed 5 of 5 and GLM 5.3 5 of 5. Their median waits were close, 2.5 s against 2.3 s. DeepSeek V4.1 Flash cost 1.6× less, $0.0014 against $0.0023 for the 5 replies. DeepSeek V4.1 Flash's replies ran 25% longer, in tokens of reply, thinking not counted.
Translation: DeepSeek V4.1 Flash passed 5 of 5 and GLM 5.3 Flash 5 of 5. DeepSeek V4.1 Flash answered 2.3× sooner at the median, 1.8 s against 4.1 s. GLM 5.3 Flash cost 3.0× less, $0.0015 against $0.0005 for the 5 replies. DeepSeek V4.1 Flash's replies ran 46% longer, in tokens of reply, thinking not counted.
SQL: DeepSeek V4.1 Flash passed 5 of 5 and GLM 5.3 Flash 5 of 5. GLM 5.3 Flash answered 1.1× sooner at the median, 1.7 s against 1.4 s. GLM 5.3 Flash cost 1.3× less, $0.0008 against $0.0006 for the 5 replies. DeepSeek V4.1 Flash's replies ran 17% longer, in tokens of reply, thinking not counted.
RAG and answering from documents: DeepSeek V4.1 Flash passed 5 of 5 and GLM 5.3 Flash 5 of 5. DeepSeek V4.1 Flash answered 2.0× sooner at the median, 1.1 s against 2.2 s. GLM 5.3 Flash cost 1.5× less, $0.0011 against $0.0008 for the 5 replies. DeepSeek V4.1 Flash's replies ran 11% longer, in tokens of reply, thinking not counted.
Agents and tool use: DeepSeek V4.1 Flash passed 5 of 5 and GLM 5.3 5 of 5. GLM 5.3 answered 1.5× sooner at the median, 1.4 s against 0.9 s. DeepSeek V4.1 Flash cost 2.4× less, $0.0009 against $0.0022 for the 5 replies. DeepSeek V4.1 Flash's replies ran 10% longer, in tokens of reply, thinking not counted.
The 3 prompts only one of DeepSeek and GLM passed
Where one family's pick passed a prompt and the other's didn't, in each check's own words.
An article in three bullets (summarization): DeepSeek V4.1 Flash passed and GLM 5.3 didn't. DeepSeek V4.1 Flash: 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.
Rewrite corporate jargon in plain words (writing): GLM 5.3 passed and DeepSeek V4.1 Flash didn't. DeepSeek V4.1 Flash: Graded 3.7 of 5 on average (lowest 3). GLM 5.3: Graded 4.0 of 5 on average (lowest 3).
Argue both sides of free buses (writing): DeepSeek V4.1 Flash passed and GLM 5.3 didn't. DeepSeek V4.1 Flash: Graded 4.3 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.
Each DeepSeek model against each GLM model
Every DeepSeek model against every GLM model on the same 50 prompts: each one's passes, how many prompts split them, and who was cheaper and quicker.
DeepSeek V4 Pro vs GLM 5.3: 45 and 48 of 50; 5 prompts split them; GLM 5.3's replies cost 2.8× less in all, and GLM 5.3 answered sooner on 44, DeepSeek V4 Pro on 2. DeepSeek V4 Pro vs GLM 5.3.
DeepSeek V4 Pro vs GLM 5.3 Flash: 45 and 40 of 50; 7 prompts split them; GLM 5.3 Flash's replies cost 10.7× less in all, and DeepSeek V4 Pro answered sooner on 24, GLM 5.3 Flash on 20. DeepSeek V4 Pro vs GLM 5.3 Flash.
DeepSeek V4.1 Flash vs GLM 5.3: 49 and 48 of 50; 3 prompts split them; DeepSeek V4.1 Flash's replies cost 2.1× less in all, and GLM 5.3 answered sooner on 33, DeepSeek V4.1 Flash on 9. DeepSeek V4.1 Flash vs GLM 5.3.
DeepSeek V4.1 Flash vs GLM 5.3 Flash: 49 and 40 of 50; 9 prompts split them; GLM 5.3 Flash's replies cost 1.8× less in all, and DeepSeek V4.1 Flash answered sooner on 36, GLM 5.3 Flash on 10. DeepSeek V4.1 Flash vs GLM 5.3 Flash.
One summarization prompt, both replies
DeepSeek V4.1 Flash and GLM 5.3 on a summarization prompt, the job where they differed most: both replies as they came.
An everyday prompt: “An article in three bullets”, in full.
DeepSeek V4.1 Flash
Passed: Graded 4.7 of 5 on average (lowest 4).
- Aldmoor's six-month Market Street bike lane trial ended; council votes in November. - Cyclist trips rose 900→2,300 daily, injuries fell 9→2; car traffic fell 14%, rush-hour delays +1 minute. - Businesses split; €410k installed, €1.1m more to make permanent.
562 tokens in, 310 out (238 of them reasoning) · 2.5 s · $0.0003 · 1 message on Pro · answered by deepseek/deepseek-v4.1-flash via StreamLake ·
GLM 5.3
Failed: Graded 4.3 of 5 on average (lowest 3); but 68 words, over the 60 allowed.
- Aldmoor ended its six-month protected bike lane trial on Market Street; the council votes in November on making them permanent. - Daily bike trips rose from about 900 to 2,300, cyclist injuries fell from nine to two, and car traffic dropped 14%, though rush-hour drives got slightly longer. - Businesses are split (27 reported more customers, 19 fewer), and permanence would cost an extra €1.1 million beyond the €410,000 spent.
539 tokens in, 218 out (118 of them reasoning) · 2.8 s · $0.0004 · 1 message on Pro · answered by z-ai/glm-5.3 via Morph ·
Every model, every job
All 4 DeepSeek and GLM models in llmwise across the 50 prompts, with what a reply cost to run and each model's count on Pro.
| Model | Passed | Hard ones | Cost per reply | On Pro |
|---|---|---|---|---|
| DeepSeek V4 ProDeepSeek | 45 of 50 | 17 of 20 | $0.0021 | Up to 250 a month |
| DeepSeek V4.1 FlashDeepSeek | 49 of 50 | 20 of 20 | $0.00034 | Up to 60 a day |
| GLM 5.3Z.ai | 48 of 50 | 19 of 20 | $0.00073 | Up to 250 a month |
| GLM 5.3 FlashZ.ai | 40 of 50 | 16 of 20 | $0.00019 | Up to 60 a day |
Passed: replies that passed their check, of those scored. Cost: what OpenRouter charged us per reply, on average; in llmwise you pay per message, not per token. Every prompt and how it's scored.
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.
The lineups at a glance
What follows from each model's facts in our catalog.
The lineups
DeepSeek: 2 models, DeepSeek V4 Pro and DeepSeek V4.1 Flash. GLM: 2 models, GLM 5.3 and GLM 5.3 Flash.
Price per message
The least expensive DeepSeek model is DeepSeek V4.1 Flash (60 messages a day on Pro); the least expensive GLM model is GLM 5.3 Flash (60 messages a day on Pro).
Context window
Both go up to 1.05M tokens of context (DeepSeek V4 Pro and GLM 5.3).
Images and PDFs
DeepSeek V4 Pro and GLM 5.3 don't read images. DeepSeek V4 Pro, DeepSeek V4.1 Flash, GLM 5.3, and GLM 5.3 Flash get a PDF's text rather than the file itself.
On the Free plan
Free's one-time trial of 5 messages covers DeepSeek V4 Pro, DeepSeek V4.1 Flash, GLM 5.3, and GLM 5.3 Flash. Paid plans have every model, with messages every month.
Model by model
Two named models side by side, prompt by prompt, each with its messages on every plan.
More head-to-heads
Each of DeepSeek and GLM against the other families, every job from the same test runs.
Where your messages go
DeepSeek and GLM models are served only through OpenRouter, by endpoints that don't store or train on prompts. The Privacy Policy has the details.
Questions
Which is better, DeepSeek or GLM?
In our test runs on September 27, 2026, the same 50 prompts across 10 jobs: DeepSeek's 2 models passed 94 of 100 replies and GLM's 2 models passed 88 of 100 replies. Job by job, both families' best models shared the top result on 9 of the 10 jobs; DeepSeek's alone had it on summarization.
Which is cheaper, DeepSeek or GLM?
In llmwise, the least expensive DeepSeek model is DeepSeek V4.1 Flash (60 messages a day on Pro), and the least expensive GLM model is GLM 5.3 Flash (60 messages a day on Pro). At API list prices (September 2026), a typical message of 4,000 tokens in and 700 out costs $0.0011 on DeepSeek V4.1 Flash and $0.0010 on GLM 5.3 Flash.
Can I use DeepSeek and GLM in the same chat?
Yes. Pick a model for each message; when you switch, the next model sees the whole conversation, including the other one's answers.
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.