GLM 5.1
GLM 5.1Alternatives?
CheaperMuse Sparkunstated+17%-7%$1.25 / $4.25Only n=1 · Meta / Chat Completions+1
BetterClaude Opus 4.8max+41%+365%$4.08
OpenKimi K2.6unstated+16%-20%$0.95 / $4Memory (4-bit): 452 GB → 616 GB
CheaperGemini 3 Flash Previewunstated+7%-48%$0.50 / $3
CheaperGPT-5.4 Mini (2026-03-17)high-15%-22%$0.75 / $4.50Muse Sparkunstated+17%-7%$1.25 / $4.25Only n=1 · Meta / Chat Completions+1Kimi K2.6unstatedOpen+16%-20%$0.95 / $4Memory (4-bit): 452 GB → 616 GBGemini 3 Flash Previewunstated+7%-48%$0.50 / $3GPT-5.4 Mini (2026-03-17)high-15%-22%$0.75 / $4.50GPT-5 Mini (2025-08-07)high-19%-68%$0.25 / $2Claude Opus 4.8max+41%+365%$4.08GPT-5.4 Pro (2026-03-05)+49%+3,040%$30 / $180No strict JSONGPT-5.4 (2026-03-05)xhigh+42%+162%$2.50 / $15Claude Opus 4.7xhigh+31%+365%$5 / $25Claude Opus 4.6max+22%+365%$5 / $25Kimi K2.6unstatedOpen+16%-20%$0.95 / $4Memory (4-bit): 452 GB → 616 GBKimi K2 ThinkingunstatedOpen-36%-60%$0.47 / $2Memory (4-bit): 452 GB → 616 GBGLM 5unstatedOpen-51%-28%$1 / $3.20
Qwen3 235B A22B Thinking 2507unstatedOpen-75%-65%$0.23 / $2.30No strict JSONGLM 4.7unstatedOpen-93%-53%$0.60 / $2.20GLM 5unstatedOpen-51%—$1 / $3.20GLM-4.6unstatedOpen-89%—$0.60 / $2.20Context: 203K → 200K+1GLM 4.7unstatedOpen-93%—$0.60 / $2.20GLM 5.3 FlashmaxOpenn/a—$0.28Defaults to max · Self-hosted+4GLM 5.3lowOpenn/a—$0.85Reasoning cannot be disabled+3GLM 5.2non-thinkingOpenn/a—$1.40 / $4.40GLM 5V Turbothinkingn/a—$1.20 / $4GLM 5 Turbothinkingn/a—$1.20 / $4All 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 FrontierMath, GLM 5.1 scores 33.4 vs 16.4 — 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?›
Muse Spark (cheaper), Claude Opus 4.8 (better), Kimi K2.6 (open weights).