diff --git a/providers/zai/models/glm-5.1.toml b/providers/zai/models/glm-5.1.toml
new file mode 100644
index 000000000..17303943d
--- /dev/null
+++ b/providers/zai/models/glm-5.1.toml
@@ -0,0 +1,27 @@
+name = "GLM-5.1"
+family = "glm"
+release_date = "2026-03-27"
+last_updated = "2026-03-27"
+attachment = false
+reasoning = true
+temperature = true
+tool_call = true
+structured_output = true
+open_weights = false
+
+[interleaved]
+field = "reasoning_content"
+
+[cost]
+input = 1.4
+output = 4.4
+cache_read = 0.26
+cache_write = 0
+
+[limit]
+context = 200000
+output = 131072
+
+[modalities]
+input = ["text"]
+output = ["text"]
diff --git a/providers/zhipuai/models/glm-5.1.toml b/providers/zhipuai/models/glm-5.1.toml
new file mode 100644
index 000000000..6f933fd29
--- /dev/null
+++ b/providers/zhipuai/models/glm-5.1.toml
@@ -0,0 +1,27 @@
+name = "GLM-5.1"
+family = "glm"
+release_date = "2026-03-27"
+last_updated = "2026-03-27"
+attachment = false
+reasoning = true
+temperature = true
+tool_call = true
+structured_output = true
+open_weights = false
+
+[interleaved]
+field = "reasoning_content"
+
+[cost]
+input = 6
+output = 24
+cache_read = 1.3
+cache_write = 0
+
+[limit]
+context = 200000
+output = 131072
+
+[modalities]
+input = ["text"]
+output = ["text"]