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Chat model · Zhipu AI

GLM 5.1

Included in Pro · came out April 2026

Careful answers about your paperwork

GLM 5.1 is the update to GLM 5 from Zhipu AI. Like GLM 5, it thinks before it answers and reads PDFs. For documents, it's the step up from GLM 5.

Chat with GLM 5.1

GLM 5.1 in numbers

What you can give it

  • Your wordsYes
  • PhotosNot this one
  • PDFs and filesYes
  • The webNot this one

Real answers

See how GLM 5.1 answers

We asked it the same everyday questions as every other model in chatmodel, one try each. This is exactly what came back.

My neighbour watered my plants for two weeks while I was away. Write a short, warm thank-you note I can leave with a small gift. Keep it under 80 words.

Dear [Name],

Thank you so much for watering my plants while I was away! Coming home to a thriving garden was the best feeling. I really appreciate you taking such good care of them for two weeks.

Please enjoy this small gift as a token of my gratitude—it’s so wonderful having you as a neighbour!

Warmly,

[Your Name]

Answered in about 27 seconds · 58 words

Ask it yourself

The GLM family in chatmodel

The newest is GLM 5.3 Flash. Ordered by release date.

  1. February 2026GLM 5
  2. April 2026GLM 5.1You're here
  3. June 2026GLM 5.2
  4. August 2026NewGLM 5.3
  5. August 2026NewestGLM 5.3 Flash

What it's good for

Try it with one of these

Press “Try this” and chatmodel opens with GLM 5.1 selected and the message already written. Change any word you like.

What changed in my policy

“I'm uploading last year's home insurance policy and this year's renewal. Tell me what has changed: the price, what's covered, the excess and any new exclusions.”

Try this

Choose a care home

“I'm looking for a care home for my father, who is 88 and has early dementia. Give me a checklist of what to look for and what to ask on a visit, grouped by topic.”

Try this

Explain a tax letter

“I'm uploading a letter from the tax office. Explain in plain words what it's about, whether I owe anything, what I need to do and by when.”

Try this

Budget formulas

“I keep a household budget in a spreadsheet with a row per expense and a column for the category. Give me formulas to total each category and show what percentage of the month each one is.”

Try this

In plain words

GLM 5.1 is a chat assistant from Zhipu AI and the update to GLM 5. It thinks before it answers and reads PDFs, which makes it a good pick for paperwork.

It doesn’t understand photos, and in chatmodel it doesn’t search the web.

How to get the most out of it

  1. Upload both versions when you want to know what changed. It’s easier than describing the differences.
  2. Tell it your situation. “I’m 67 and retired” or “we rent” changes what matters in a document.
  3. Ask for a checklist. It turns long advice into something you can tick off.
  4. Check the key numbers on the original before you act.

How it compares with the rest of the family

GLM 5 is the earlier version with the same abilities. GLM 5.2 swaps documents for photos. GLM 5.3 is a newer full model but works with text only, and GLM 5.3 Flash is the lighter one that reads photos. Of the newer GLMs, 5.1 is the one for PDFs.

When to pick another model

For long documents and warm writing, Claude Sonnet 5 is a common choice. For money paperwork, our household budget guide has messages ready to copy.

Other models worth a look

GLM 5

Zhipu AI

Read the guide

GLM 5.3

Zhipu AI

Read the guide

GLM 5.2

Zhipu AI

Read the guide

Frequently asked questions

What's the difference between GLM 5 and GLM 5.1?

GLM 5.1 is the later version. Both think before they answer and read PDFs, and neither understands photos.

Should I pick GLM 5.1 or GLM 5.3?

If you want to upload PDFs, GLM 5.1. GLM 5.3 is newer but in chatmodel it works with text only.

Can GLM 5.1 read photos?

No. For pictures, use GLM 5.2 or GLM 5.3 Flash.

Can it search the web?

Not in chatmodel. Share any recent facts yourself.

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