diff --git a/metagpt/provider/bedrock/bedrock_provider.py b/metagpt/provider/bedrock/bedrock_provider.py
index 6a7c91740..3222d2c76 100644
--- a/metagpt/provider/bedrock/bedrock_provider.py
+++ b/metagpt/provider/bedrock/bedrock_provider.py
@@ -114,6 +114,11 @@ class Ai21Provider(BaseBedrockProvider):
             )
         return body
 
+    def get_choice_text_from_stream(self, event) -> str:
+        rsp_dict = json.loads(event["chunk"]["bytes"])
+        completions = rsp_dict.get("choices", [{}])[0].get("delta", {}).get("content", "")
+        return completions
+
     def _get_completion_from_dict(self, rsp_dict: dict) -> str:
         if self.model_type == "j2":
             # See https://docs.ai21.com/reference/j2-complete-ref
diff --git a/metagpt/provider/bedrock/utils.py b/metagpt/provider/bedrock/utils.py
index 527cc9037..38950c056 100644
--- a/metagpt/provider/bedrock/utils.py
+++ b/metagpt/provider/bedrock/utils.py
@@ -2,8 +2,6 @@ from metagpt.logs import logger
 
 # max_tokens for each model
 NOT_SUUPORT_STREAM_MODELS = {
-    # Jamba-Instruct
-    "ai21.jamba-instruct-v1:0": 256000,
     # Jurassic-2 Mid-v1 and Ultra-v1
     # + Legacy date: 2024-04-30 (us-west-2/Oregon)
     # + EOL date: 2024-08-31 (us-west-2/Oregon)
@@ -12,6 +10,8 @@ NOT_SUUPORT_STREAM_MODELS = {
 }
 
 SUPPORT_STREAM_MODELS = {
+    # Jamba-Instruct
+    "ai21.jamba-instruct-v1:0": 256000,
     # Titan Text Large
     "amazon.titan-tg1-large": 8000,
     # Titan Text G1 - Express