GLM-5.1
Z.ai's (Zhipu) 2026 flagship. 200K context, strong agentic and tool-use scores — 98% on τ²-Bench Telecom, on par with Grok 4.3. Artificial Analysis Intelligence Index 51.
200K
tokens
16K
tokens
$0.98
per 1M tokens
$3.08
per 1M tokens
48
tokens/sec
Apr 2026
2026-04-28
$2.03
per 1M tokens
43.3
quality per $
Capabilities
Benchmarks
Pricing History
Compare With
Open Source — Licensed under MIT
About GLM-5.1
GLM-5.1 is a balanced AI model by Z.ai (Zhipu AI), released on April 28, 2026. It supports a context window of 200K tokens and can generate up to 16K output tokens.
At $0.98 per million input tokens and $3.08 per million output tokens, its blended cost of $2.03/1M tokens puts it in the mid-range pricing tier. Its value score of 43.3 reflects the balance of quality and cost.
GLM-5.1 is available as an open-source model under the MIT license, meaning you can self-host it for predictable costs or use it through API providers like Swfte Connect.
Using GLM-5.1 with Swfte
Access GLM-5.1 through Swfte Connect, our unified LLM gateway. Connect gives you a single API for 50+ models, with automatic routing, cost optimization, and fallback handling. You can also try GLM-5.1 in our AI Playground before integrating.