Add GPT-5 support

README.md

@@ -78,7 +78,7 @@ You can configure `~/.metagpt/config2.yaml` according to the [example](https://g
 ```yaml
 llm:
   api_type: "openai"  # or azure / ollama / groq etc. Check LLMType for more options
-  model: "gpt-4-turbo"  # or gpt-3.5-turbo
+  model: "gpt-4-turbo"  # or gpt-5 / gpt-3.5-turbo
   base_url: "https://api.openai.com/v1"  # or forward url / other llm url
   api_key: "YOUR_API_KEY"
 ```

config/config2.example.yaml

@@ -2,7 +2,7 @@ llm:
   api_type: "openai"  # or azure / ollama / groq etc.
   base_url: "YOUR_BASE_URL"
   api_key: "YOUR_API_KEY"
-  model: "gpt-4-turbo"  # or gpt-3.5-turbo
+  model: "gpt-4-turbo"  # or gpt-5 / gpt-3.5-turbo
   proxy: "YOUR_PROXY"  # for LLM API requests
   # timeout: 600 # Optional. If set to 0, default value is 300.
   # Details: https://azure.microsoft.com/en-us/pricing/details/cognitive-services/openai-service/

metagpt/ext/spo/app.py

@@ -116,17 +116,17 @@ def main():
         # LLM Settings
         st.subheader("LLM Settings")
         opt_model = st.selectbox(
-            "Optimization Model", ["claude-3-5-sonnet-20240620", "gpt-4o", "gpt-4o-mini", "deepseek-chat"], index=0
+            "Optimization Model", ["claude-3-5-sonnet-20240620", "gpt-5", "gpt-4o", "gpt-4o-mini", "deepseek-chat"], index=0
         )
         opt_temp = st.slider("Optimization Temperature", 0.0, 1.0, 0.7)
 
         eval_model = st.selectbox(
-            "Evaluation Model", ["gpt-4o-mini", "claude-3-5-sonnet-20240620", "gpt-4o", "deepseek-chat"], index=0
+            "Evaluation Model", ["gpt-5", "gpt-4o-mini", "claude-3-5-sonnet-20240620", "gpt-4o", "deepseek-chat"], index=0
         )
         eval_temp = st.slider("Evaluation Temperature", 0.0, 1.0, 0.3)
 
         exec_model = st.selectbox(
-            "Execution Model", ["gpt-4o-mini", "claude-3-5-sonnet-20240620", "gpt-4o", "deepseek-chat"], index=0
+            "Execution Model", ["gpt-5", "gpt-4o-mini", "claude-3-5-sonnet-20240620", "gpt-4o", "deepseek-chat"], index=0
         )
         exec_temp = st.slider("Execution Temperature", 0.0, 1.0, 0.0)
 

metagpt/provider/constant.py

@@ -35,6 +35,9 @@
     "gpt-4o",
     "gpt-4o-mini",
     "openai/gpt-4o",
+    # Assume gpt-5 supports multimodal; adjust if needed
+    "gpt-5",
+    "openai/gpt-5",
     "gemini-2.0-flash-exp",
     "gemini-2.0-pro-exp-02-05",
     "claude-3-5-sonnet-v2",

metagpt/provider/openai_api.py

@@ -5,6 +5,7 @@
 @File    : openai.py
 @Modified By: mashenquan, 2023/11/21. Fix bug: ReadTimeout.
 @Modified By: mashenquan, 2023/12/1. Fix bug: Unclosed connection caused by openai 0.x.
+@Modified By: dickymoore, 2025/09/13. gpt-5 support
 """
 from __future__ import annotations
 
@@ -138,17 +139,25 @@ async def _achat_completion_stream(self, messages: list[dict], timeout=USE_CONFI
     def _cons_kwargs(self, messages: list[dict], timeout=USE_CONFIG_TIMEOUT, **extra_kwargs) -> dict:
         kwargs = {
             "messages": messages,
-            "max_tokens": self._get_max_tokens(messages),
             # "n": 1,  # Some services do not provide this parameter, such as mistral
             # "stop": None,  # default it's None and gpt4-v can't have this one
             "temperature": self.config.temperature,
             "model": self.model,
             "timeout": self.get_timeout(timeout),
         }
         if "o1-" in self.model:
-            # compatible to openai o1-series
+            # compatible to openai o1-series (do not send max tokens)
             kwargs["temperature"] = 1
-            kwargs.pop("max_tokens")
+        else:
+            max_tokens_value = self._get_max_tokens(messages)
+            if str(self.model).startswith("gpt-5"):
+                # OpenAI GPT-5 family expects max_completion_tokens
+                kwargs["max_completion_tokens"] = max_tokens_value
+                # GPT-5 only supports default temperature = 1
+                kwargs["temperature"] = 1
+            else:
+                # Other OpenAI-compatible models expect max_tokens
+                kwargs["max_tokens"] = max_tokens_value
         if extra_kwargs:
             kwargs.update(extra_kwargs)
         return kwargs

metagpt/utils/token_counter.py

@@ -39,6 +39,8 @@
     "gpt-4-vision-preview": {"prompt": 0.01, "completion": 0.03},  # TODO add extra image price calculator
     "gpt-4-1106-vision-preview": {"prompt": 0.01, "completion": 0.03},
     "gpt-4o": {"prompt": 0.005, "completion": 0.015},
+    # Placeholder pricing for gpt-5; update when official
+    "gpt-5": {"prompt": 0.005, "completion": 0.015},
     "gpt-4o-mini": {"prompt": 0.00015, "completion": 0.0006},
     "gpt-4o-mini-2024-07-18": {"prompt": 0.00015, "completion": 0.0006},
     "gpt-4o-2024-05-13": {"prompt": 0.005, "completion": 0.015},
@@ -78,6 +80,8 @@
     "openai/gpt-4": {"prompt": 0.03, "completion": 0.06},  # start, for openrouter
     "openai/gpt-4-turbo": {"prompt": 0.01, "completion": 0.03},
     "openai/gpt-4o": {"prompt": 0.005, "completion": 0.015},
+    # Placeholder pricing for gpt-5 via OpenRouter-style prefix
+    "openai/gpt-5": {"prompt": 0.005, "completion": 0.015},
     "openai/gpt-4o-2024-05-13": {"prompt": 0.005, "completion": 0.015},
     "openai/gpt-4o-mini": {"prompt": 0.00015, "completion": 0.0006},
     "openai/gpt-4o-mini-2024-07-18": {"prompt": 0.00015, "completion": 0.0006},
@@ -250,6 +254,8 @@
     "o1-mini": 128000,
     "o1-mini-2024-09-12": 128000,
     "gpt-4o": 128000,
+    # Assume gpt-5 has at least 128k context; update if needed
+    "gpt-5": 128000,
     "gpt-4o-2024-05-13": 128000,
     "gpt-4o-2024-08-06": 128000,
     "gpt-4o-mini-2024-07-18": 128000,
@@ -298,6 +304,7 @@
     "openai/gpt-4": 8192,  # start, for openrouter
     "openai/gpt-4-turbo": 128000,
     "openai/gpt-4o": 128000,
+    "openai/gpt-5": 128000,
     "openai/gpt-4o-2024-05-13": 128000,
     "openai/gpt-4o-mini": 128000,
     "openai/gpt-4o-mini-2024-07-18": 128000,
@@ -461,6 +468,7 @@ def count_message_tokens(messages, model="gpt-3.5-turbo-0125"):
         "gpt-4o-2024-08-06",
         "gpt-4o-mini",
         "gpt-4o-mini-2024-07-18",
+        "gpt-5",
         "o1-preview",
         "o1-preview-2024-09-12",
         "o1-mini",