Add claude 4

[jdanbrown]

Issue

Released today (2025-05-22) 🎉

• https://www.anthropic.com/news/claude-4

Please include the openrouter models in addition to the usual anthropic/bedrock/etc. ones :)

• https://openrouter.ai/anthropic/claude-sonnet-4
• https://openrouter.ai/anthropic/claude-opus-4

Version and model info

No response

[NN1985]

Looking forward to seeing the benchmarks as well.

[y0ug]

In the meantime you can create a file .aider.model.settings.yml in your $HOME, project, etc...

Advanced model settings | aider

aider/aider/resources/model-settings.yml at main · Aider-AI/aider

- name: anthropic/claude-4-sonnet-20250514
  overeager: true
  edit_format: diff
  weak_model_name: anthropic/claude-3-5-haiku-20241022
  use_repo_map: true
  examples_as_sys_msg: true
  extra_params:
    extra_headers:
      anthropic-beta: prompt-caching-2024-07-31,pdfs-2024-09-25,output-128k-2025-02-19
    max_tokens: 64000
  cache_control: true
  editor_model_name: anthropic/claude-3-7-sonnet-20250219
  editor_edit_format: editor-diff
  accepts_settings: ["thinking_tokens"]

[UnbornAztecKing]

- name: claude-4-opus-20250514
  edit_format: diff
  weak_model_name: claude-3-5-haiku-20241022
  use_repo_map: true

[slonik-az]

surprisingly @paul-gauthier has not labeled this as a priority.

[jdemaeyer]

surprisingly @paul-gauthier has not labeled this as a priority.

Jesus, it's not even been 24 h since the release. Give the man some time to react (or maybe even – God forbid – time to enjoy his life for a day)

[jdanbrown]

surprisingly @paul-gauthier has not labeled this as a priority.

Please lay off. I consider myself lucky that he does such a fantastic job maintaining and improving aider. It's not our place to tell him to work harder or faster, or on our own timelines. He'll get to it when he gets to it.

[ThePixelDeveloper]

There's a sick irony in that Aider could probably help you add support (and create a PR) for Claude 4 using models that are already available to you.