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Chat with GLM 5.3 for free on AIFreeForever

GLM 5.3 Free AI Chatbot

Get fast answers from AIFreeForever's GLM 5.3 chatbot. This model is suitable for fixing code, checking code for security flaws and planning long office tasks.

Create anything with GLM 5.3 using our @skills feature

About GLM 5.3 AI model

GLM 5.3 is Z.ai's open AI model for long coding jobs, cybersecurity and office tasks, with a 1M-token context window. It always thinks before it answers. Chat with GLM 5.3 free on AIFreeForever.

GLM 5.3Made by Z.ai Try GLM 5.3 on AIFreeForever→
Made byZ.ai
Model IDglm-5.3
Size753B parameters
LicenceGLM-5.3 License (open weights)
API price per 1M tokens$1.40 in / $4.40 out
Price of GLM 5.3 on AIFreeForeverFree

AIFreeForever is not affiliated with or endorsed by the model providers. All trademarks and logos belong to their owners.

What GLM 5.3 is best at

Cybersecurity

Scores 84.5% on CyberGym, the top score in Z.ai's table.

Coding

Scores 88.2 on Terminal Bench 2.1, a test of coding in a terminal.

Business tasks

Scores 1769 on GDPval-AA v2, the top score in Z.ai's table.

Automation

Scores 48.2 on AutomationBench, the top score in Z.ai's table.

How to use GLM 5.3 for free on AIFreeForever

  1. 1

    Open the chat

    and choose GLM 5.3.

  2. 2

    Describe your task

  3. 3

    Paste your code or text

    GLM 5.3 reads text only.

  4. 4

    Read the answer

    and ask follow-up questions.

Tip: Give GLM 5.3 the whole task at once, with the goal, the files and what "done" looks like.
Try it for free

Why choose AIFreeForever's free GLM 5.3?

No upgrade required

Use GLM 5.3 free, without a Z.ai account or GLM Coding Plan.

Code fixing

It scored 66.9 on DeepSWE v1.1, a test of fixing real code.

Cybersecurity

It scored 84.5% on CyberGym, the top score in Z.ai's table.

1M context window

Paste large code files and long reports.

Business tasks

It scored 1769 on GDPval-AA v2, a test of office work.

File editing

Turn answers into Word, Excel and PowerPoint files you can edit.

GLM 5.3 benchmark results

GLM 5.3 has the top score in Z.ai's table on cybersecurity (84.5% on CyberGym), office work (1769 on GDPval-AA v2) and automation (48.2 on AutomationBench).

BenchmarkWhat it testsGLM 5.3GLM 5.2Claude Opus 4.8GPT-5.6 Sol
Terminal Bench 2.1Coding in a terminal88.281.085.088.8
DeepSWE v1.1Fixing real code66.946.258.072.7
CyberGymCybersecurity84.5%77.2%78.1%83.6%
ExploitBenchSecurity exploits54.4%24.4%40.0%76.5%
Toolathlon VerifiedUsing tools73.059.976.274.9
AutomationBench v1.0.6Automating office tasks48.226.241.045.8
HLE with toolsExpert questions62.554.757.964.5
GDPval-AA v2Office work (Elo)1769150815881730

This benchmark was extracted from Z.ai.

GPT-5.6 Sol scored higher than GLM 5.3 on five tests in the same table. On DeepSWE v1.1, GPT-5.6 Sol got 72.7 and GLM 5.3 got 66.9. On ExploitBench, GPT-5.6 Sol got 76.5% and GLM 5.3 got 54.4%.

GLM 5.3 vs other top models

GLM 5.3 is the model below built for coding and cybersecurity, and it reads text only.

ModelContextImage inputStrength
GLM 5.31MNoCoding and cybersecurity
GPT-6 Luna Pro1.05MYesHard maths and science
MiniMax M2.7197KNoCoding and office files
DeepSeek V3.1128KNoCoding at low cost

Pick GLM 5.3 for long coding and security jobs. Pick GPT-6 Luna Pro when you need to send images.

GLM 5.3 vs other GLM models

GLM 5.3 uses the same base model as GLM 5.2, and all its gains come from extra training after that. GLM 4.6V is Z.ai's older model that reads images and video.

How does GLM 5.3 compare to MiniMax M2.7?

Both are open coding models that read text only. GLM 5.3 has a 1M-token window and scored 1769 on GDPval-AA v2. MiniMax M2.7 scored 1495 on GDPval-AA and edits Word, Excel and PowerPoint files.

Chat with GLM 5.3 on AIFreeForever

Type your request below and GLM 5.3 answers in the same chat. Use it to fix bugs, review code for security flaws, plan a long project or turn notes into a report.

This model is subject to availability, based on our budget. For long-term use, we advise you to pay for an upgrade with the model provider.
Tip: GLM 5.3 is best suited for everyday tasks.

What you can create with GLM 5.3

A chrome robot owl fixing a loose bolt on a small brass engine with its beakPlain chat

Bug fixing

The cause, the fix and a test.“Here's my code and the error. Find the bug, fix it and write one test.” Try the prompt→ A heavy steel padlock with violet glowing seams resting on a coil of chainPlain chat

Security review

Risky lines and safer code.“Check this login code for security flaws and show a safer version.” Try the prompt→ A futuristic white concept car with a glowing mint green roof strip, seen from the side@Website

Landing pages

A one-page site in HTML.“@Website A landing page for a bike repair shop with prices and a contact form.” Try the prompt→ A brass compass and a rolled paper map tied with green stringPlain chat

Project plans

Steps, owners and risks.“Plan moving our shop's orders from spreadsheets to a database in 10 steps.” Try the prompt→ A tall stack of glass tiles in purple, green and lavender, neatly aligned like a grid@Excel

Spreadsheets

A tracker with formulas.“@Excel A project tracker with tasks, owners, due dates and a status column.” Try the prompt→ A vintage slide projector with a violet lens glowing softly@PPT

Slide decks

Slides from your notes.“@PPT 8 slides on our Q3 results from these notes.” Try the prompt→

Best GLM 5.3 prompts

Free GLM 5.3 Bug Fix Prompt

“Here's my code and the error message. Find the cause, fix it, and write one test that would have caught it: [paste]” Try the prompt→

Free GLM 5.3 Refactor Prompt

“Refactor this function so it's easier to read. Keep the same behaviour and explain each change in one line.” Try the prompt→
Download the free GLM 5.3 prompt guide (PDF) →

How GLM 5.3 works

GLM 5.3 works by thinking before every answer, and developers can set how much it thinks: low, high or max. Max is the default and the setting Z.ai recommends for long coding jobs, as explained in Z.ai's GLM-5.3 guide.

How much does GLM 5.3 cost?

GLM 5.3 costs $1.40 per million input tokens and $4.40 per million output tokens on Z.ai's API. It's free on AIFreeForever.

WherePriceCached inputContext
Z.ai API$1.40 in / $4.40 out per 1M tokens$0.261M
Z.ai GLM Coding PlanMonthly plan with a points quota—1M
OpenRouter$0.07 in / $1.40 out per 1M tokens—1M
Hugging Face weightsFree (GLM-5.3 License)—1M
AIFreeForever's Free AIFree——

Can you use GLM 5.3 for free?

Yes. You can use GLM 5.3 free in two ways:

  • On AIFreeForever: pick it in the chat and start typing.
  • On your own servers: download the weights from Hugging Face. At 753B parameters, it needs a cluster of data-centre GPUs.
Chat with GLM 5.3

Limitations of GLM 5.3 on AIFreeForever

GLM 5.3 has four limits on AIFreeForever, which connects to it through its API and adds our skills and file editors:

  • GLM 5.3 reads text only, not images.
  • It always thinks first, so answers take longer than on non-thinking models.
  • Z.ai's chat app and coding tools aren't part of AIFreeForever.
  • You can't run Python, start agents that work on their own, or run regression analysis here.
Tip: Test GLM 5.3 free here first. For daily coding, Z.ai's GLM Coding Plan gives the best experience.

Best ways to test GLM 5.3 free

TestHow to use it on AIFreeForever
Bug fixingPaste broken code; run its fix yourself.
SecurityPaste a small login script; check the flaws it finds.
Long codePaste a large file; ask about a function near the end.
Compare modelsRun the same task on MiniMax M2.7.

These limitations only cover what you can do with GLM 5.3 on AIFreeForever, not the limits of the model on Z.ai’s own platform. All trademarks belong to their owners, and the model’s full features are only available when you use it officially through Z.ai.

GLM 5.3 FAQs

Is GLM 5.3 free?

Yes, on AIFreeForever. On Z.ai's API it costs $1.40 per million input tokens and $4.40 per million output tokens.

Who made GLM 5.3?

Z.ai made GLM 5.3.

Is GLM 5.3 open source?

It's open weights. You can download it under the GLM-5.3 License, which allows business use. Model-as-a-service companies with over $10 billion in yearly revenue must pass Z.ai's security review first.

Can GLM 5.3 read images?

No. GLM 5.3 reads and writes text only.

How large is the GLM 5.3 context window?

GLM 5.3 takes up to 1M tokens and answers with up to 128K tokens.

Can I turn off thinking in GLM 5.3?

No. Thinking is always on, but you can set it to low, high or max.

How big is GLM 5.3?

GLM 5.3 has 753B parameters.

Are GLM 5.3 answers 100% correct?

No. It can make mistakes, so test its code and check important facts.

Get answers from GLM 5.3 for free

Ask GLM 5.3 a question, paste your code or add a file and get instant answers. Not satisfied? Compare your answers to other models for free.

Chat with GLM 5.3

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