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GLM 5.1

Z.ai · released 4 months ago

GLM 5.1 is a Z.ai model with a 203K token context window — about 290 pages of text. It reads Text and replies in Text. It can show its reasoning before it answers.

$1.09

input / 1M tokens

$3.44

output / 1M tokens

203K

context — about 290 pages

0.82¢

a client proposal

Pricing

Input
$1.09 per million tokens
Output
$3.44 per million tokens
Cached input
$0.203 per million tokens

Billed from your Alyph wallet. Prices can change when the provider changes theirs — last checked August 9, 2026.

The numbers

Provider
Z.ai
Released
4 months ago (2026-04-07)
Context window
203K tokens — about 290 pages
Max output
131K tokens per reply
Input
Text
Output
Text
Reasoning
Shows its thinking before answering

Cost vs Token Amount

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80% Input20% Output
free$0.78$1.560 tokens250k500k750k1000k
GLM 5.1

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What a task costs

2K tokens in · 500 tokens out.

GLM 5.1

Z.ai

0.39¢

for this task

56% input · 44% output

Full pricing →

Your $5 welcome credit covers about 1,278 of these.

Compare GLM 5.1

Closest in price on a typical task:

GLM 5.1 vs Cogito v2.1 671B →GLM 5.1 vs Qwen3 Max →GLM 5.1 vs Qwen3 Max Thinking →GLM 5.1 vs GPT-5.4 Mini →Any other combination →

Questions, answered

How much does GLM 5.1 cost on Alyph?

GLM 5.1 costs $1.09 per million input tokens and $3.44 per million output tokens on Alyph. A typical task — 5K tokens in, 800 out — works out to about 0.82¢. Billed from your Alyph wallet, with hard spending limits. Prices can change when the provider changes theirs; this page was last checked on August 9, 2026.

What is GLM 5.1's context window?

203K tokens — about 290 pages. Replies can be up to 131K tokens long.

Can GLM 5.1 read images and files?

GLM 5.1 is text-only. The canvas still serializes uploads into plain text, so you can work with files — but it cannot see images.

Does GLM 5.1 show its reasoning?

Yes. GLM 5.1 can expose its thinking before the final answer, so you can watch how it got there.

Test GLM 5.1 against Cogito v2.1 671B

One prompt, both models at the same time, the better answer wins. Free to start, with $5 of credit.

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