diff --git a/constants.py b/constants.py
index 34880bb20..024bf7b03 100644
--- a/constants.py
+++ b/constants.py
@@ -31,3 +31,16 @@ KEY_ATTENTION_CLAMP_KQV          = "{llm}.attention.clamp_kqv"
 # RoPE
 KEY_ROPE_DIMENSION_COUNT         = "{llm}.rope.dimension_count"
 KEY_ROPE_SCALE                   = "{llm}.rope.scale"
+
+# tokenization
+KEY_TOKENIZER_MODEL   = "tokenizer.ggml.model"
+KEY_TOKENIZER_LIST    = "tokenizer.ggml.tokens"
+KEY_TOKENIZER_SCORES  = "tokenizer.ggml.scores"
+KEY_TOKENIZER_MERGES  = "tokenizer.ggml.merges"
+KEY_TOKENIZER_BOS_ID  = "tokenizer.ggml.bos_token_id"
+KEY_TOKENIZER_EOS_ID  = "tokenizer.ggml.eos_token_id"
+KEY_TOKENIZER_UNK_ID  = "tokenizer.ggml.unknown_token_id"
+KEY_TOKENIZER_SEP_ID  = "tokenizer.ggml.seperator_token_id"
+KEY_TOKENIZER_PAD_ID  = "tokenizer.ggml.padding_token_id"
+KEY_TOKENIZER_HF_JSON = "tokenizer.huggingface.json"
+KEY_TOKENIZER_RWKV    = "tokenizer.rwkv.world"