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70 lines
2.2 KiB
Markdown
70 lines
2.2 KiB
Markdown
---
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parent: Connecting to LLMs
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nav_order: 900
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---
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# Model warnings
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Aider supports connecting to almost any LLM,
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but it may not work well with less capable models.
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If you see the model returning code, but aider isn't able to edit your files
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and commit the changes...
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this is usually because the model isn't capable of properly
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returning "code edits".
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Models weaker than GPT 3.5 may have problems working well with aider.
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Aider tries to sanity check that it is configured correctly
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to work with the specified model:
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- It checks to see that all required environment variables are set for the model. These variables are required to configure things like API keys, API base URLs, etc.
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- It checks a metadata database to look up the context window size and token costs for the model.
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Sometimes one or both of these checks will fail, so aider will issue
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some of the following warnings.
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## Missing environment variables
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```
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Model azure/gpt-4-turbo: Missing these environment variables:
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- AZURE_API_BASE
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- AZURE_API_VERSION
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- AZURE_API_KEY
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```
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You need to set the listed environment variables.
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Otherwise you will get error messages when you start chatting with the model.
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## Unknown which environment variables are required
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```
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Model gpt-5: Unknown which environment variables are required.
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```
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Aider is unable verify the environment because it doesn't know
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which variables are required for the model.
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If required variables are missing,
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you may get errors when you attempt to chat with the model.
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You can look in the
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[litellm provider documentation](https://docs.litellm.ai/docs/providers)
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to see if the required variables are listed there.
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## Unknown model, did you mean?
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```
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Model gpt-5: Unknown model, context window size and token costs unavailable.
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Did you mean one of these?
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- gpt-4
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```
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If you specify a model that aider has never heard of, you will get an
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"unknown model" warning.
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This means aider doesn't know the context window size and token costs
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for that model.
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Some minor functionality will be limited when using such models, but
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it's not really a significant problem.
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Aider will also try to suggest similarly named models,
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in case you made a typo or mistake when specifying the model name.
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