Expand ANTHROPIC_MODELS list with recent Claude model names#5173
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paul-gauthier merged 2 commits intoMay 22, 2026
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`ANTHROPIC_MODELS` in `aider/models.py` is used by `sanity_check_models` to map a bare Claude model name (no provider prefix) to the `ANTHROPIC_API_KEY` environment variable. Models not in this list fall through to the keymap provider lookup. The list was stale — it had `claude-2`, the 3.x family, `claude-3-5-*`, `claude-sonnet-4-20250514`, `claude-opus-4-20250514`, plus 4.5/4.6/4.7 unrounded names — but was missing: - `claude-3-7-sonnet-20250219` - `claude-opus-4-1` / `claude-opus-4-1-20250805` - `claude-opus-4-5` / `claude-opus-4-5-20251101` - `claude-opus-4-6-20260205` (dated variant) - `claude-opus-4-7-20260416` (dated variant) Companion to the OPENAI_MODELS list expansion. All added names have corresponding entries in `aider/resources/model-settings.yml`.
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Summary
`ANTHROPIC_MODELS` in `aider/models.py` is used by `sanity_check_models` to map a bare Claude model name (no provider prefix) to the `ANTHROPIC_API_KEY` environment variable. Models not in this list fall through to the keymap provider lookup, which fails when the user passes the name without a provider prefix.
The list was stale — it had `claude-2`, the 3.x family, `claude-3-5-*`, `claude-sonnet-4-20250514`, `claude-opus-4-20250514`, plus the 4.5/4.6/4.7 unrounded names — but was missing several recent Anthropic models:
All added names have corresponding entries in `aider/resources/model-settings.yml`, so the list now matches the rest of the project. Companion to the OPENAI_MODELS list expansion PR.
Effect
Before this change, `aider --model claude-opus-4-5` with `ANTHROPIC_API_KEY` set in the environment would show "ANTHROPIC_API_KEY: Not set" because the bare name didn't match the list. After this change, the API key is correctly detected.
Test plan