microsoft/autogen · error · InvalidOperationException

Claude is an image understanding model only. It can interpre

Error message

Claude is an image understanding model only. It can interpret and analyze images, but it cannot generate, produce, edit, manipulate or create images

What it means

Error "Claude is an image understanding model only. It can interpret and analyze images, but it cannot generate, produce, edit, manipulate or create images" thrown in microsoft/autogen.

Source

Thrown at dotnet/src/AutoGen.Anthropic/Middleware/AnthropicMessageConnector.cs:140

                    from: from.Name);
            }

            throw new NotSupportedException($"Expected {nameof(response.Content)} to have one output");
        }

        var content = response.Content[0];
        switch (content)
        {
            case TextContent textContent:
                return new TextMessage(Role.Assistant, textContent.Text ?? string.Empty, from: from.Name);

            case ToolUseContent toolUseContent:
                return new ToolCallMessage(toolUseContent.Name ?? string.Empty,
                    toolUseContent.Input?.ToJsonString() ?? string.Empty,
                    from: from.Name);

            case ImageContent:
                throw new InvalidOperationException(
                    "Claude is an image understanding model only. It can interpret and analyze images, but it cannot generate, produce, edit, manipulate or create images");
            default:
                throw new ArgumentOutOfRangeException(nameof(content));
        }
    }

    private IEnumerable<IMessage<ChatMessage>> ProcessTextMessage(TextMessage textMessage, IAgent agent)
    {
        ChatMessage messages;

        if (textMessage.From == agent.Name)
        {
            messages = new ChatMessage(
                "assistant", textMessage.Content);
        }
        else if (textMessage.From is null)
        {
            if (textMessage.Role == Role.User)

View on GitHub (pinned to 027ecf0a37)

Solutions

1. Do not request image generation from Claude; use it only for image analysis

Example fix

Remove image-generation requests; use a dedicated image model instead

When it happens

Trigger: Thrown at dotnet/src/AutoGen.Anthropic/Middleware/AnthropicMessageConnector.cs:140 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of microsoft/autogen@027ecf0a37 (2026-08-15). Data as JSON: /api/errors/a8bf2ba5c84df3fb. Report an issue: GitHub.