GLM 5.1
GLM 5.1Alternatives?
CheaperGemini 3.8 Flashhighwins 56%-30%*$3.49Sampling parameters are ignored+1
BetterGPT-5.6 Solxhighwins 54%+272%$1.18
OpenMiMo v2.6 Prounstatedwins 55%-75%$0.43 / $0.87Memory (4-bit): 452 GB → 615 GB+4CheaperGLM 5.3 FlashunstatedOpenwins 54%-89%$0.15 / $0.50Defaults to max · Self-hosted+4
CheaperMuse Spark 1.3maxwins 54%-7%$3.69Only auto tool_choice is supported+5Gemini 3.8 Flashhighwins 56%-30%*$3.49Sampling parameters are ignored+1MiMo v2.6 ProunstatedOpenwins 55%-75%$0.43 / $0.87Memory (4-bit): 452 GB → 615 GB+4GLM 5.3 FlashunstatedOpenwins 54%-89%$0.15 / $0.50Defaults to max · Self-hosted+4Muse Spark 1.3maxwins 54%-7%$3.69Only auto tool_choice is supported+5MiMo v2.5 ProunstatedOpenwins 53%-75%$0.43 / $0.87Memory (4-bit): 452 GB → 614 GBGPT-5.6 Solxhighwins 54%+272%$1.18GPT-5.5highwins 54%+423%$1.40Prompts with >272K input tokensGemini 4 Argonhighwins 61%+86%*$1.62Synchronous output stops at 65,536+2
Claude Opus 5.5highwins 62%+272%$1.82No forced tool use+5
Kimi K3maxOpenwins 55%+179%$2.00Memory (4-bit): 452 GB → 1,668 GB+4MiMo v2.6 ProunstatedOpenwins 55%-75%$0.43 / $0.87Memory (4-bit): 452 GB → 615 GB+4GLM 5.3maxOpenwins 54%same$2.01Reasoning cannot be disabled+3GLM 5.3 FlashunstatedOpenwins 54%-89%$0.15 / $0.50Defaults to max · Self-hosted+4MiMo v2.5 ProunstatedOpenwins 53%-75%$0.43 / $0.87Memory (4-bit): 452 GB → 614 GBGLM 5.2maxOpensamesame$1.28GLM 5.3maxOpenwins 54%—$2.01Reasoning cannot be disabled+3GLM 5.3 FlashunstatedOpenwins 54%—$0.15 / $0.50Defaults to max · Self-hosted+4GLM 5.2maxOpensame—$1.28GLM 5unstatedOpenwins 46%—$1 / $3.20GLM 5V Turbounstatedwins 46%—$1.20 / $4GLM 4.7unstatedOpenwins 44%—$0.60 / $2.20GLM 4.5unstatedOpenwins 43%—$0.60 / $2.20Context: 203K → 131KGLM 4.5 AirunstatedOpenwins 36%—$0.20 / $1.10Context: 203K → 131K+1All Z.ai models →Run it yourself
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10 versionsBenchmarks
in Chat & KnowledgeFAQ
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 GLM 5?›
On Arena Text · instruction following, GLM 5.1 scores 1,452.4 vs 1,427.7 — higher.
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?›
Gemini 3.8 Flash (cheaper), GPT-5.6 Sol (better), MiMo v2.6 Pro (open weights).