Aider appears to be defaulting to OpenAI for commit messages

[jkoshiel]

Issue

Aider is throwing errors related to OpenAI API keys when using other models. This began occurring in 0.69.1.

OS:
Arch Linux/hyprland/kitty (all packages up to date)

Steps to reproduce using Openrouter:
open terminal
cd to local repo

run:
export OPENROUTER_API_KEY=with_a_valid_key_here

run:
aider

aider command:
/model openrouter/anthropic/claude-3.5-sonnet

Add some files using /add

send a prompt to the model
model

prompt is sent to OpenRouter without issue, filed edited, and commit is applied. At the end of the cycle, it prints the following chain:

Tokens: 12k sent, 757 received. Cost: $0.05 message, $0.38 session.
Applied edit to src/filename.ext (file name removed to protect the innocent tokens)
litellm.AuthenticationError: AuthenticationError: OpenAIException - The api_key client option must be set either by passing api_key to the client or by setting the OPENAI_API_KEY environment variable
The API provider is not able to authenticate you. Check your API key.
litellm.AuthenticationError: AuthenticationError: OpenAIException - The api_key client option must be set either by passing api_key to the client or by setting the OPENAI_API_KEY environment variable
The API provider is not able to authenticate you. Check your API key.
Failed to generate commit message!
Commit 488248e (no commit message provided)
litellm.AuthenticationError: AuthenticationError: OpenAIException - The api_key client option must be set either by passing api_key to the client or by setting the OPENAI_API_KEY environment variable
The API provider is not able to authenticate you. Check your API key.
litellm.AuthenticationError: AuthenticationError: OpenAIException - The api_key client option must be set either by passing api_key to the client or by setting the OPENAI_API_KEY environment variable
The API provider is not able to authenticate you. Check your API key.
summarizer unexpectedly failed for all models
You can use /undo to undo and discard each aider commit.

Version and model info

Aider v0.69.1
Main model: openrouter/anthropic/claude-3.5-sonnet with diff edit format, infinite output
Weak model: openrouter/anthropic/claude-3-5-haiku
Git repo: .git with 157 files