fix: change OPENAI_API_BASE to OPENAI_BASE_URL

docs/providers.md

@@ -49,5 +49,5 @@ You first need to install `ollama`, then you can run it with:
 ```sh
 ollama pull llama3.2:1b
 ollama serve
-OPENAI_API_BASE="http://127.0.0.1:11434/v1" gptme 'hello' -m local/llama3.2:1b
+OPENAI_BASE_URL="http://127.0.0.1:11434/v1" gptme 'hello' -m local/llama3.2:1b
 ```

gptme/llm_openai.py

@@ -2,6 +2,7 @@
 from collections.abc import Generator
 from typing import TYPE_CHECKING
 
+from .config import Config
 from .constants import TEMPERATURE, TOP_P
 from .message import Message, msgs2dicts
 
@@ -20,7 +21,7 @@
 }
 
 
-def init(llm: str, config):
+def init(llm: str, config: Config):
     global openai
     from openai import AzureOpenAI, OpenAI  # fmt: skip
 
@@ -39,7 +40,11 @@ def init(llm: str, config):
         api_key = config.get_env_required("OPENROUTER_API_KEY")
         openai = OpenAI(api_key=api_key, base_url="https://openrouter.ai/api/v1")
     elif llm == "local":
-        api_base = config.get_env_required("OPENAI_API_BASE")
+        # OPENAI_API_BASE renamed to OPENAI_BASE_URL: https://github.com/openai/openai-python/issues/745
+        api_base = config.get_env("OPENAI_API_BASE")
+        api_base = api_base or config.get_env("OPENAI_BASE_URL")
+        if not api_base:
+            raise KeyError("Missing environment variable OPENAI_BASE_URL")
         api_key = config.get_env("OPENAI_API_KEY") or "ollama"
         openai = OpenAI(api_key=api_key, base_url=api_base)
     else: