GLM 5.1
GLM 5.1Alternatives?
CheaperGPT-6.1 Solmax×27.8-29%$0.72Remove unsupported parameters+5
BetterClaude Haiku 5.5low×6.2-98%$0.024Remove sampling parameters+5OpenGLM 5.3max×20.7+97%$2.01Reasoning cannot be disabled+3CheaperClaude Sonnet 5.5high×21.7-13%$0.88No forced tool use+5CheaperGPT-6 Astralow×20.7-20%$0.82Monitoring can return HTTP 403+2GPT-6.1 Solmax×27.8-29%$0.72Remove unsupported parameters+5Claude Sonnet 5.5high×21.7-13%$0.88No forced tool use+5GPT-6 Astralow×20.7-20%$0.82Monitoring can return HTTP 403+2
MiMo v2.6 ProthinkingOpen×17.3-87%$0.13Memory (4-bit): 452 GB → 615 GB+4GLM 5.3lowOpen×17.3-16%$0.85Reasoning cannot be disabled+3Claude Haiku 5.5low×6.2-98%$0.024Remove sampling parameters+5GPT-6 Lunahigh×2.3-97%$0.029Function calling only with none · Chat Completions+3MiMo v2.6 FlashthinkingOpen×11.2-94%$0.062Pass back reasoning_content+3GPT-6.1 Sollow×15.3-87%$0.13Remove unsupported parameters+5GPT-6 Sollow×4.5-87%$0.13GLM 5.3maxOpen×20.7+97%$2.01Reasoning cannot be disabled+3MiMo v2.6 ProthinkingOpen×17.3-87%$0.13Memory (4-bit): 452 GB → 615 GB+4
DeepSeek V4.1 Flash 1017maxOpen×16.7-74%$0.26Memory (4-bit): 452 GB → 458 GB+5
Ling 3.1 FlashOpen×16.5same$1.00
Step 5 PreviewthinkingOpen×16.5same$1.03web_search not available · Chat Completions+2GLM 5.3lowOpen×17.3-16%$0.85Reasoning cannot be disabled+3GLM 5.3 FlashmaxOpen×16.2-72%$0.28Defaults to max · Self-hosted+4GLM 5.2maxOpen-50%+44%$1.47GLM 5V Turbothinkingn/a—$1.20 / $4GLM 5 Turbothinkingn/a—$1.20 / $4GLM 5thinkingOpenn/a—$1 / $3.20GLM 4.7 FlashthinkingOpenn/a—$0.061 / $0.40Context: 203K → 200KGLM 4.7thinkingOpenn/a—$0.60 / $2.20All Z.ai models →Run it yourself
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10 versionsBenchmarks
in CodingFAQ
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 $1.02 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?›
#80 of 334 in Chat & Knowledge, #49 of 132 in Coding, #60 of 133 in Agents & Tool Use, #29 of 195 in Writing & Language, #66 of 133 in Vision & Documents. Strongest at: Tool calling, Reasoning, Science, Knowledge, Instructions.
Is GLM 5.1 better than GPT-5.4 Mini?›
On Terminal-Bench 4.0, GLM 5.1 scores 2 vs 2 — about the same. It is 128% more expensive per task.
How can I use GLM 5.1?›
Through the API of Alibaba, AtlasCloud, Baidu, Chutes, DeepInfra and 6 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?›
GPT-6.1 Sol (cheaper), Claude Haiku 5.5 (better), GLM 5.3 (open weights).