GLM 5.1

Apr 2026
GLM 5.1
Compare in
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$0.75per task?
$1.40 / $4.40per 1M in / out?cache $0.26
75 tok/sfirst token in 1.7 s?
203Kcontext

Rankingin thinking mode?

Alternatives?

Run it yourself

estimate
Fits on✗ 8 GB (phone, laptop)✗ 16 GB✗ 24 GB GPU✗ 48 GB GPU✗ 80 GB GPU
LicenceMITfree for commercial use

History

10 versions
657075808590Jan 26Apr 26Jul 26Release dateVals MedScribe4.75.15.25.3
657075808590Jan 26Apr 26Jul 26Release dateVals MedScribe4.75.15.25.3

Benchmarks

all categories
Chat & Knowledge
SimpleQA-Verifiedlab38.1
Chinese-SimpleQAlab75
MMLU-Pro EMlab86
HMMT February 2026lab89.4
IMOAnswerBenchlab83.8
Apexlab11.5
Apex Shortlistlab72.4
GDPval-AA Elolab1,535
Coding
SciCode44.8#77
SWE-bench Pro (edition unstated)lab58.4
DeepSWE (edition unstated)lab18
Terminal Bench 2.0lab63.5
SWE Multilinguallab73.3
Agents & Tool Use
Toolathlonlab40.7
BrowseComplab79.3
HLE without toolslab34.7
HLE with toolslab50.4
MCPAtlas Publiclab71.8
Writing & Language

FAQ

How much does GLM 5.1 cost?›

$1.40 per 1M input tokens and $4.40 per 1M output tokens; cached input $0.26 per 1M; cheapest via lab-qwen at $0.82 / $3.30. A typical benchmark task costs about $0.75 at default effort.

Is GLM 5.1 free to use?›

There is no free API; the cheapest paid price is $0.82 per 1M input tokens. The weights are open, so you can run it yourself.

How good is GLM 5.1, and what is it best at?›

#82 of 336 in Chat & Knowledge, #51 of 134 in Coding, #62 of 135 in Agents & Tool Use, #23 of 197 in Writing & Language, #68 of 135 in Vision & Documents. Strongest at: Tool calling, Reasoning, Science, Knowledge, Instructions.

Is GLM 5.1 better than Qwen3 Max Thinking?›

On Vals MedScribe, GLM 5.1 scores 72.3 vs 72.7 — about the same.

How can I use GLM 5.1?›

Through the API of Alibaba, AtlasCloud, Chutes, DeepInfra, Friendli and 5 more.

What is the context window of GLM 5.1?›

203K tokens, with up to 131K output tokens.

When was GLM 5.1 released? Is there a newer version?›

Released 2026-04-07. It has been superseded by GLM 5.2.

Is GLM 5.1 open source?›

Yes, the weights are open (MIT licence).

Can I run GLM 5.1 locally?›

The weights are open and can be self-hosted; hardware needs are not confirmed yet.

Can GLM 5.1 read images?›

No, it accepts text only.

What is GLM 5.1?›

GLM 5.1 is an open-weights language model from Z.ai, released Apr 2026, the successor to GLM 5.

What are the best alternatives to GLM 5.1?›

Muse Spark 1.2 (cheaper), Claude Haiku 4.5 (better), GLM 5.3 Flash (open weights).