Add multimodal support to @langchain/groq

[reimeri]

Checked

• I searched existing ideas and did not find a similar one
• I added a very descriptive title
• I've clearly described the feature request and motivation for it

Feature request

Currently the message content can be only text. convertMessagesToGroqParams checks for this:

  if (typeof message.content !== "string") {
    throw new Error("Non string message content not supported");
  }

Motivation

Would be nice to have support for images now that the new llama 4 models are out.

Proposal (If applicable)

No response

[muhammadfaizan027915]

@reimeri Could you please convert this discussion into an issue? I'm also experiencing the same problem with langchain-groq.
@jacoblee93 I’m interested in contributing to the feature enhancement in langchain/groq as well.