diff --git a/gguf-py/gguf/constants.py b/gguf-py/gguf/constants.py
index 93c614d6..d6d02099 100644
--- a/gguf-py/gguf/constants.py
+++ b/gguf-py/gguf/constants.py
@@ -1147,47 +1147,86 @@ class PoolingType(IntEnum):
 
 
 class GGMLQuantizationType(IntEnum):
-    F32     = 0
-    F16     = 1
-    Q4_0    = 2
-    Q4_1    = 3
-    Q5_0    = 6
-    Q5_1    = 7
-    Q8_0    = 8
-    Q8_1    = 9
-    Q2_K    = 10
-    Q3_K    = 11
-    Q4_K    = 12
-    Q5_K    = 13
-    Q6_K    = 14
-    Q8_K    = 15
-    IQ2_XXS = 16
-    IQ2_XS  = 17
-    IQ3_XXS = 18
-    IQ1_S   = 19
-    IQ4_NL  = 20
-    IQ3_S   = 21
-    IQ2_S   = 22
-    IQ4_XS  = 23
-    I8      = 24
-    I16     = 25
-    I32     = 26
-    I64     = 27
-    F64     = 28
-    IQ1_M   = 29
-    BF16    = 30
-    Q4_0_4_4 = 31
-    Q4_0_4_8 = 32
-    Q4_0_8_8 = 33
-    IQ1_BN  = 34,
-    IQ2_BN  = 35,
-    Q8_K64  = 36,
-    IQ2_K   = 37,
-    IQ3_K   = 38,
-    IQ4_K   = 39,
-    IQ5_K   = 40,
-    IQ6_K   = 41,
-    IQ2_TN  = 42,
+    F32       =   0
+    F16       =   1
+    Q4_0      =   2
+    Q4_1      =   3
+    Q5_0      =   6
+    Q5_1      =   7
+    Q8_0      =   8
+    Q8_1      =   9
+    Q2_K      =  10
+    Q3_K      =  11
+    Q4_K      =  12
+    Q5_K      =  13
+    Q6_K      =  14
+    Q8_K      =  15
+    IQ2_XXS   =  16
+    IQ2_XS    =  17
+    IQ3_XXS   =  18
+    IQ1_S     =  19
+    IQ4_NL    =  20
+    IQ3_S     =  21
+    IQ2_S     =  22
+    IQ4_XS    =  23
+    I8        =  24
+    I16       =  25
+    I32       =  26
+    I64       =  27
+    F64       =  28
+    IQ1_M     =  29
+    BF16      =  30
+    Q4_0_4_4  =  31
+    Q4_0_4_8  =  32
+    Q4_0_8_8  =  33
+    I2_S      =  36
+    Q8_0_X4   =  97
+    Q8_1_X4   =  98
+    Q8_2_X4   =  99
+    Q6_0      = 133
+    IQ1_BN    = 134
+    IQ2_BN    = 135
+    Q8_K64    = 136
+    IQ2_K     = 137
+    IQ3_K     = 138
+    IQ4_K     = 139
+    IQ5_K     = 140
+    IQ6_K     = 141
+    IQ4_KS    = 144
+    IQ2_KS    = 145
+    IQ4_KSS   = 146
+    Q8_K16    = 147
+    Q8_K32    = 148
+    Q8_KR8    = 149
+    Q8_K128   = 150
+    Q8_KV     = 151
+    Q4_0_R8   = 202
+    Q5_0_R4   = 206
+    Q8_0_R8   = 208
+    Q2_K_R4   = 210
+    Q3_K_R4   = 211
+    Q4_K_R4   = 212
+    Q5_K_R4   = 213
+    Q6_K_R4   = 214
+    IQ2_XXS_R4= 216
+    IQ2_XS_R4 = 217
+    IQ3_XXS_R4= 218
+    IQ1_S_R4  = 219
+    IQ4_NL_R4 = 220
+    IQ3_S_R4  = 221
+    IQ2_S_R4  = 222
+    IQ4_XS_R8 = 223
+    IQ1_M_R4  = 229
+    BF16_R16  = 230
+    Q6_0_R4   = 233
+    IQ2_BN_R4 = 335
+    IQ2_K_R4  = 337
+    IQ3_K_R4  = 338
+    IQ4_K_R4  = 339
+    IQ5_K_R4  = 340
+    IQ4_KS_R4 = 344
+    Q8_KV_R8  = 398
+    Q8_K_R8   = 399
 
 
 class ExpertGatingFuncType(IntEnum):