diff --git a/packages/packages.json b/packages/packages.json
index 75b33fdc..0fc60750 100644
--- a/packages/packages.json
+++ b/packages/packages.json
@@ -2,10 +2,10 @@
     "dev": {
         "connection/valory/websocket_client/0.1.0": "bafybeiflmystocxaqblhpzqlcop2vkhsknpzjx2jomohomaxamwskeokzm",
         "skill/valory/contract_subscription/0.1.0": "bafybeicyugrkx5glat4p4ezwf6i7oduh26eycfie6ftd4uxrknztzl3ik4",
-        "agent/valory/mech/0.1.0": "bafybeierifcna6tju6gblkcbudekz7qtwey5d5zklkrdrnwbgu4fha3mda",
+        "agent/valory/mech/0.1.0": "bafybeia5wlctflbgvtigc45gfzimftosrvsi6c6z57o2iiuij3kidpcp3e",
         "skill/valory/mech_abci/0.1.0": "bafybeifktlrkncnb5hjtwc7xqjag2pzmtciogp6nsm4t5umrqhmkmzyl5i",
         "contract/valory/agent_mech/0.1.0": "bafybeicgt3bwogpwv7t57xuxzcq7vxmoq4glcjoprabb6d4ajtgjwzsrzi",
-        "service/valory/mech/0.1.0": "bafybeiab5duxsqoidikglede3vdauj6zizvn5jnsro3razlhiphhnzusji",
+        "service/valory/mech/0.1.0": "bafybeiejotownjomk36oyj6f5kkeg4k5hrkvellaswcv7x2qhceevqinfe",
         "protocol/valory/acn_data_share/0.1.0": "bafybeih5ydonnvrwvy2ygfqgfabkr47s4yw3uqxztmwyfprulwfsoe7ipq",
         "skill/valory/task_submission_abci/0.1.0": "bafybeia6b7rzrbrhijkctxpwzeywqvsdqm2j5u5ee6fbmrp6t3x2afdase",
         "skill/valory/task_execution/0.1.0": "bafybeiffc4nqpk3ri7kq5tuljbgnxqmhfj3brpznr6ujxqaif24tj64kcq",
diff --git a/packages/valory/agents/mech/aea-config.yaml b/packages/valory/agents/mech/aea-config.yaml
index 5d1413de..2e646e15 100644
--- a/packages/valory/agents/mech/aea-config.yaml
+++ b/packages/valory/agents/mech/aea-config.yaml
@@ -191,7 +191,7 @@ models:
     args:
       agent_mech_contract_addresses: ${list:["0xFf82123dFB52ab75C417195c5fDB87630145ae81"]}
       task_deadline: ${float:240.0}
-      file_hash_to_tools_json: ${list:[["bafybeiemk2xmhkvvglukyxp52fh7irgoubq7bydyx4i67wfrcv3c4t47sa",["claude-prediction-offline","claude-prediction-online"]],["bafybeibi34bhbvesmvd6o24jxvuldrwen4wj62na3lhva7k4afkg2shinu",["openai-text-davinci-002","openai-text-davinci-003","openai-gpt-3.5-turbo","openai-gpt-4"]],["bafybeiafdm3jctiz6wwo3rmo3vdubk7j7l5tumoxi5n5rc3x452mtkgyua",["stabilityai-stable-diffusion-v1-5","stabilityai-stable-diffusion-xl-beta-v2-2-2","stabilityai-stable-diffusion-512-v2-1","stabilityai-stable-diffusion-768-v2-1"]],["bafybeidpbnqbruzqlq424qt3i5dcvyqmcimshjilftabnrroujmjhdmteu",["transfer-native"]],["bafybeiglhy5epaytvt5qqdx77ld23ekouli53qrf2hjyebd5xghlunidfi",["prediction-online","prediction-offline"]]]}
+      file_hash_to_tools_json: ${list:[["bafybeialjint727x536gsfs23dzsxttc3tqatfmv7gnu77jfljo5xihvq4",["claude-prediction-offline","claude-prediction-online"]],["bafybeibi34bhbvesmvd6o24jxvuldrwen4wj62na3lhva7k4afkg2shinu",["openai-text-davinci-002","openai-text-davinci-003","openai-gpt-3.5-turbo","openai-gpt-4"]],["bafybeiafdm3jctiz6wwo3rmo3vdubk7j7l5tumoxi5n5rc3x452mtkgyua",["stabilityai-stable-diffusion-v1-5","stabilityai-stable-diffusion-xl-beta-v2-2-2","stabilityai-stable-diffusion-512-v2-1","stabilityai-stable-diffusion-768-v2-1"]],["bafybeidpbnqbruzqlq424qt3i5dcvyqmcimshjilftabnrroujmjhdmteu",["transfer-native"]],["bafybeiglhy5epaytvt5qqdx77ld23ekouli53qrf2hjyebd5xghlunidfi",["prediction-online","prediction-offline"]]]}
       api_keys_json: ${list:[["openai", "dummy_api_key"],["stabilityai", "dummy_api_key"],["google_api_key",
         "dummy_api_key"],["google_engine_id", "dummy_api_key"]]}
       polling_interval: ${float:30.0}
diff --git a/packages/valory/services/mech/service.yaml b/packages/valory/services/mech/service.yaml
index 320617ff..7d9c3c58 100644
--- a/packages/valory/services/mech/service.yaml
+++ b/packages/valory/services/mech/service.yaml
@@ -7,7 +7,7 @@ license: Apache-2.0
 fingerprint:
   README.md: bafybeif7ia4jdlazy6745ke2k2x5yoqlwsgwr6sbztbgqtwvs3ndm2p7ba
 fingerprint_ignore_patterns: []
-agent: valory/mech:0.1.0:bafybeierifcna6tju6gblkcbudekz7qtwey5d5zklkrdrnwbgu4fha3mda
+agent: valory/mech:0.1.0:bafybeia5wlctflbgvtigc45gfzimftosrvsi6c6z57o2iiuij3kidpcp3e
 number_of_agents: 4
 deployment:
   agent:
diff --git a/tools/prediction_request_claude/prediction_request_claude.py b/tools/prediction_request_claude/prediction_request_claude.py
index 9ca0a631..add6909f 100644
--- a/tools/prediction_request_claude/prediction_request_claude.py
+++ b/tools/prediction_request_claude/prediction_request_claude.py
@@ -118,6 +118,9 @@
 * This is correct: "{\n  \"p_yes\": 0.2,\n  \"p_no\": 0.8,\n  \"confidence\": 0.7,\n  \"info_utility\": 0.5\n}"
 """
 
+ASSISTANT_TEXT = "```json"
+STOP_SEQUENCES = ["```"]
+
 
 def search_google(query: str, api_key: str, engine: str, num: int = 3) -> List[str]:
     service = build("customsearch", "v1", developerKey=api_key)
@@ -254,11 +257,12 @@ def run(**kwargs) -> Tuple[str, Optional[str], Optional[Dict[str, Any]]]:
     prediction_prompt = PREDICTION_PROMPT.format(
         user_prompt=prompt, additional_information=additional_information
     )
-    prediction_prompt = f"{HUMAN_PROMPT}{prediction_prompt}{AI_PROMPT}"
+    prediction_prompt = f"{HUMAN_PROMPT}{prediction_prompt}{AI_PROMPT}{ASSISTANT_TEXT}"
 
     completion = anthropic.completions.create(
         model=engine,
         max_tokens_to_sample=300,
         prompt=prediction_prompt,
+        stop_sequences=STOP_SEQUENCES,
     )
     return completion.completion, prediction_prompt, None