Possibility of adding beta header in Claude

[luismiguelamado]

Hello,

Thank you for such a great library! I'm really enjoying using it.

I'm encountering a limitation with Claude 3.7 regarding the output token limit of 8192 tokens.

There is a beta header that can be added to increase the output tokens. According to Anthropic's [documentation](https://docs.anthropic.com/en/docs/about-claude/models/all-models), "Include the beta header output-128k-2025-02-19 in your API request to increase the maximum output token length to 128k tokens for Claude 3.7 Sonnet."

Is there a possibility of adding this header? Perhaps during the configuration, we could have a flag to enable or disable the header.

Thank you in advance!

[crmne]

Hey @luismiguelamado thank you so much!

I'd love to see that added to the library! Honestly, that header should be the default and I would go without configuration on this one.

Regarding the implementation: I did something similar - changing something only for a model - for the o1 and o3 series of models here:

ruby_llm/lib/ruby_llm/provider.rb

Lines 13 to 18 in b32a435

	def complete(messages, tools:, temperature:, model:, &block) # rubocop:disable Metrics/MethodLength
	normalized_temperature = if capabilities.respond_to?(:normalize_temperature)
	capabilities.normalize_temperature(temperature, model)
	else
	temperature
	end

A similar implementation would be much appreciated!