Class: Raif::Llm

Inherits:
Object
  • Object
show all
Includes:
ActiveModel::Model, Concerns::Llms::MessageFormatting
Defined in:
app/models/raif/llm.rb

Constant Summary collapse

VALID_RESPONSE_FORMATS = 
[:text, :json, :html].freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(key:, api_name:, display_name: nil, model_provider_settings: {}, supported_provider_managed_tools: [], supports_native_tool_use: true, temperature: nil, max_completion_tokens: nil, input_token_cost: nil, output_token_cost: nil, deprecated: false, retirement_date: nil, replacement_key: nil, migration_note: nil, lifecycle: {}, pricing: {}, capabilities: {}) ⇒ Llm

Returns a new instance of Llm.



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# File 'app/models/raif/llm.rb', line 35

def initialize(
  key:,
  api_name:,
  display_name: nil,
  model_provider_settings: {},
  supported_provider_managed_tools: [],
  supports_native_tool_use: true,
  temperature: nil,
  max_completion_tokens: nil,
  input_token_cost: nil,
  output_token_cost: nil,
  deprecated: false,
  retirement_date: nil,
  replacement_key: nil,
  migration_note: nil,
  lifecycle: {},
  pricing: {},
  capabilities: {}
)
  @key = key
  @api_name = api_name
  @display_name = display_name
  @provider_settings = model_provider_settings
  @supports_native_tool_use = supports_native_tool_use
  @default_temperature = temperature || 0.7
  @default_max_completion_tokens = max_completion_tokens
  @input_token_cost = input_token_cost
  @output_token_cost = output_token_cost
  @supported_provider_managed_tools = supported_provider_managed_tools.map(&:to_s)
  @deprecated = deprecated
  @retirement_date = retirement_date
  @replacement_key = replacement_key
  @migration_note = migration_note
  @lifecycle = lifecycle
  @pricing = pricing
  @capabilities = capabilities
end

Instance Attribute Details

#api_name ⇒ Object

Returns the value of attribute api_name.



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# File 'app/models/raif/llm.rb', line 8

def api_name
  @api_name
end

#capabilities ⇒ Object (readonly)

capabilities is the manifest's claim for this endpoint, not the behavioral switch: supports_structured_outputs? and streaming_supported? consult provider settings and Raif.config.streaming_unsupported_model_keys, so read those to decide behavior.



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# File 'app/models/raif/llm.rb', line 26

def capabilities
  @capabilities
end

#default_max_completion_tokens ⇒ Object

Returns the value of attribute default_max_completion_tokens.



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# File 'app/models/raif/llm.rb', line 8

def default_max_completion_tokens
  @default_max_completion_tokens
end

#default_temperature ⇒ Object

Returns the value of attribute default_temperature.



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# File 'app/models/raif/llm.rb', line 8

def default_temperature
  @default_temperature
end

#deprecated ⇒ Object

Returns the value of attribute deprecated.



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# File 'app/models/raif/llm.rb', line 8

def deprecated
  @deprecated
end

#display_name ⇒ Object

Returns the value of attribute display_name.



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# File 'app/models/raif/llm.rb', line 8

def display_name
  @display_name
end

#input_token_cost ⇒ Object

Returns the value of attribute input_token_cost.



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# File 'app/models/raif/llm.rb', line 8

def input_token_cost
  @input_token_cost
end

#key ⇒ Object

Returns the value of attribute key.



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# File 'app/models/raif/llm.rb', line 8

def key
  @key
end

#lifecycle ⇒ Object (readonly)

capabilities is the manifest's claim for this endpoint, not the behavioral switch: supports_structured_outputs? and streaming_supported? consult provider settings and Raif.config.streaming_unsupported_model_keys, so read those to decide behavior.



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# File 'app/models/raif/llm.rb', line 26

def lifecycle
  @lifecycle
end

#migration_note ⇒ Object

Returns the value of attribute migration_note.



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# File 'app/models/raif/llm.rb', line 8

def migration_note
  @migration_note
end

#output_token_cost ⇒ Object

Returns the value of attribute output_token_cost.



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# File 'app/models/raif/llm.rb', line 8

def output_token_cost
  @output_token_cost
end

#pricing ⇒ Object (readonly)

capabilities is the manifest's claim for this endpoint, not the behavioral switch: supports_structured_outputs? and streaming_supported? consult provider settings and Raif.config.streaming_unsupported_model_keys, so read those to decide behavior.



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# File 'app/models/raif/llm.rb', line 26

def pricing
  @pricing
end

#provider_settings ⇒ Object

Returns the value of attribute provider_settings.



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# File 'app/models/raif/llm.rb', line 8

def provider_settings
  @provider_settings
end

#replacement_key ⇒ Object

Returns the value of attribute replacement_key.



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# File 'app/models/raif/llm.rb', line 8

def replacement_key
  @replacement_key
end

#retirement_date ⇒ Object

Returns the value of attribute retirement_date.



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# File 'app/models/raif/llm.rb', line 8

def retirement_date
  @retirement_date
end

#supported_provider_managed_tools ⇒ Object

Returns the value of attribute supported_provider_managed_tools.



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# File 'app/models/raif/llm.rb', line 8

def supported_provider_managed_tools
  @supported_provider_managed_tools
end

#supports_native_tool_use ⇒ Object Also known as: supports_native_tool_use?

Returns the value of attribute supports_native_tool_use.



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# File 'app/models/raif/llm.rb', line 8

def supports_native_tool_use
  @supports_native_tool_use
end

Class Method Details

.batch_inference_cost_multiplier ⇒ Object

Multiplier applied to per-token costs when a model completion was resolved through this provider's Batch API. Defaults to 0.5 (50% discount), which is what both Anthropic and OpenAI charge for batch requests today.



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# File 'app/models/raif/llm.rb', line 338

def self.batch_inference_cost_multiplier
  0.5
end

.cache_creation_input_token_cost_multiplier ⇒ Object

Multiplier applied to the base input_token_cost to derive the per-token cost for cache creation writes. Return nil when there is no write surcharge.



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# File 'app/models/raif/llm.rb', line 313

def self.cache_creation_input_token_cost_multiplier
  nil
end

.cache_read_input_token_cost_multiplier ⇒ Object

Multiplier applied to the base input_token_cost to derive the per-token cost for cache reads. Return nil when the provider has no cache pricing.



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# File 'app/models/raif/llm.rb', line 307

def self.cache_read_input_token_cost_multiplier
  nil
end

.prompt_tokens_include_cached_tokens? ⇒ Boolean

Override in subclasses to indicate whether prompt_tokens reported by the provider already include cached tokens as a subset (OpenAI, Google, OpenRouter) or whether cached tokens are reported separately and are additive to prompt_tokens (Anthropic, Bedrock).

Returns:

  • (Boolean) 


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# File 'app/models/raif/llm.rb', line 301

def self.prompt_tokens_include_cached_tokens?
  true
end

.streaming_supported_for_key?(model_key) ⇒ Boolean

Whether streaming is supported for the given Raif model key. A model key is considered unsupported if it matches any entry in Raif.config.streaming_unsupported_model_keys (each entry may be a String, Symbol, or Regexp). Used by #chat to transparently fall back to the non-streaming path for models with known-broken streaming endpoints.

Returns:

  • (Boolean) 


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# File 'app/models/raif/llm.rb', line 116

def self.streaming_supported_for_key?(model_key)
  entries = Array(Raif.config.streaming_unsupported_model_keys)
  key_str = model_key.to_s
  entries.none? do |entry|
    case entry
    when Regexp then entry.match?(key_str)
    else entry.to_s == key_str
    end
  end
end

.supports_batch_inference? ⇒ Boolean

Whether this provider supports submitting model completions via a Batch API. Override in subclasses by including Raif::Concerns::Llms::SupportsBatchInference, which sets this to true.

Returns:

  • (Boolean) 


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# File 'app/models/raif/llm.rb', line 320

def self.supports_batch_inference?
  false
end

.valid_response_formats ⇒ Object 



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# File 'app/models/raif/llm.rb', line 293

def self.valid_response_formats
  VALID_RESPONSE_FORMATS
end

Instance Method Details

#added_on ⇒ Object 



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# File 'app/models/raif/llm.rb', line 87

def added_on
  lifecycle[:added_on]
end

#build_forced_tool_choice(tool_name) ⇒ Hash

Build the tool_choice parameter to force a specific tool to be called. Each provider implements this to return the correct format.

Parameters:

  • tool_name (String) —

    The name of the tool to force

Returns:

  • (Hash) —

    The tool_choice parameter for the provider's API

Raises:

  • (NotImplementedError) 


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# File 'app/models/raif/llm.rb', line 350

def build_forced_tool_choice(tool_name)
  raise NotImplementedError, "#{self.class.name} must implement #build_forced_tool_choice"
end

#build_pending_model_completion(messages:, response_format: :text, available_model_tools: [], source: nil, system_prompt: nil, temperature: nil, max_completion_tokens: nil, tool_choice: nil, stream_response: false, allow_parallel_tool_calls: false, anthropic_prompt_caching_enabled: false, bedrock_prompt_caching_enabled: false, open_ai_store_responses: nil, open_router_data_collection: nil, open_router_zdr: nil, raif_model_completion_batch: nil, batch_custom_id: nil) ⇒ Raif::ModelCompletion

Builds and persists a Raif::ModelCompletion without performing the request. Used by #chat (which then calls perform_model_completion!) and by callers that want to defer execution -- e.g. submitting through a provider Batch API via Raif::Task.build_for_batch / Raif::Task#prepare_for_batch!.

Returns:



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# File 'app/models/raif/llm.rb', line 258

def build_pending_model_completion(messages:, response_format: :text, available_model_tools: [], source: nil,
  system_prompt: nil, temperature: nil, max_completion_tokens: nil, tool_choice: nil,
  stream_response: false, allow_parallel_tool_calls: false, anthropic_prompt_caching_enabled: false,
  bedrock_prompt_caching_enabled: false, open_ai_store_responses: nil, open_router_data_collection: nil,
  open_router_zdr: nil, raif_model_completion_batch: nil, batch_custom_id: nil)
  temperature ||= default_temperature
  max_completion_tokens ||= default_max_completion_tokens

  model_completion = Raif::ModelCompletion.create!(
    messages: format_messages(messages),
    system_prompt: system_prompt,
    response_format: response_format,
    source: source,
    llm_model_key: key.to_s,
    model_api_name: api_name,
    temperature: temperature,
    max_completion_tokens: max_completion_tokens,
    available_model_tools: available_model_tools,
    tool_choice: tool_choice&.to_s,
    stream_response: stream_response,
    request_settings: {
      "open_ai_store_responses" => open_ai_store_responses,
      "open_router_data_collection" => open_router_data_collection&.to_s.presence,
      "open_router_zdr" => open_router_zdr
    }.compact,
    raif_model_completion_batch: raif_model_completion_batch,
    batch_custom_id: batch_custom_id
  )

  model_completion.allow_parallel_tool_calls = allow_parallel_tool_calls
  model_completion.anthropic_prompt_caching_enabled = anthropic_prompt_caching_enabled
  model_completion.bedrock_prompt_caching_enabled = bedrock_prompt_caching_enabled
  model_completion
end

#build_required_tool_choice ⇒ Hash, String

Build the tool_choice parameter to require the model to call any tool (but not a specific one). Each provider implements this to return the correct format.

Returns:

  • (Hash, String) —

    The tool_choice parameter for the provider's API

Raises:

  • (NotImplementedError) 


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# File 'app/models/raif/llm.rb', line 357

def build_required_tool_choice
  raise NotImplementedError, "#{self.class.name} must implement #build_required_tool_choice"
end

#chat(message: nil, messages: nil, response_format: :text, available_model_tools: [], source: nil, system_prompt: nil, temperature: nil, max_completion_tokens: nil, tool_choice: nil, allow_parallel_tool_calls: false, anthropic_prompt_caching_enabled: false, bedrock_prompt_caching_enabled: false, open_ai_store_responses: nil, open_router_data_collection: nil, open_router_zdr: nil, &block) ⇒ Object 



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# File 'app/models/raif/llm.rb', line 131

def chat(message: nil, messages: nil, response_format: :text, available_model_tools: [], source: nil, system_prompt: nil, temperature: nil,
  max_completion_tokens: nil, tool_choice: nil, allow_parallel_tool_calls: false, anthropic_prompt_caching_enabled: false,
  bedrock_prompt_caching_enabled: false, open_ai_store_responses: nil, open_router_data_collection: nil,
  open_router_zdr: nil, &block)
  unless response_format.is_a?(Symbol)
    raise ArgumentError,
      "Raif::Llm#chat - Invalid response format: #{response_format}. Must be a symbol (you passed #{response_format.class}) and be one of: #{VALID_RESPONSE_FORMATS.join(", ")}" # rubocop:disable Layout/LineLength
  end

  unless VALID_RESPONSE_FORMATS.include?(response_format)
    raise ArgumentError, "Raif::Llm#chat - Invalid response format: #{response_format}. Must be one of: #{VALID_RESPONSE_FORMATS.join(", ")}"
  end

  unless message.present? || messages.present?
    raise ArgumentError, "Raif::Llm#chat - You must provide either a message: or messages: argument"
  end

  if message.present? && messages.present?
    raise ArgumentError, "Raif::Llm#chat - You must provide either a message: or messages: argument, not both"
  end

  # Normalize :required / "required" to the symbol form for validation
  tool_choice = :required if tool_choice.to_s == "required"

  # The adapters' build_*_tool_choice methods validate support again for callers that
  # bypass chat; checking here keeps the failure ahead of the ModelCompletion record
  # and the authorizer call.
  if tool_choice == :required
    if available_model_tools.blank?
      raise ArgumentError,
        "Raif::Llm#chat - tool_choice: :required requires at least one available model tool"
    end

    validate_tool_choice_support!(:required)
  elsif tool_choice.present?
    unless available_model_tools.map(&:to_s).include?(tool_choice.to_s)
      raise ArgumentError,
        "Raif::Llm#chat - Invalid tool choice: #{tool_choice} is not included in the available model tools: #{available_model_tools.join(", ")}"
    end

    validate_tool_choice_support!(:forced)
  end

  # Runs before the ModelCompletion is created or any provider call is made,
  # and before the llm_api_requests_enabled guard so authorization applies
  # even when API requests are disabled. Vetoes by raising. Any raised
  # exception is tagged with Raif::Errors::ModelCompletionAuthorizationError
  # so wrapped flows (Raif::Task.run, Raif::Conversation) re-raise it to the
  # caller instead of swallowing it as an ordinary model failure.
  if Raif.config.model_completion_authorizer
    begin
      Raif.config.model_completion_authorizer.call(llm: self, source: source)
    rescue StandardError => e
      e.extend(Raif::Errors::ModelCompletionAuthorizationError) unless e.is_a?(Raif::Errors::ModelCompletionAuthorizationError)
      raise
    end
  end

  unless Raif.config.llm_api_requests_enabled
    Raif.logger.warn("LLM API requests are disabled. Skipping request to #{api_name}.")
    return
  end

  messages = [{ "role" => "user", "content" => message }] if message.present?

  temperature ||= default_temperature
  max_completion_tokens ||= default_max_completion_tokens

  stream_response = block_given? && streaming_supported?
  if block_given? && !stream_response
    Raif.logger.info(
      "Raif::Llm#chat: streaming requested but disabled for model key #{key.inspect} " \
        "via Raif.config.streaming_unsupported_model_keys; falling back to non-streaming."
    )
  end

  model_completion = build_pending_model_completion(
    messages: messages,
    response_format: response_format,
    available_model_tools: available_model_tools,
    source: source,
    system_prompt: system_prompt,
    temperature: temperature,
    max_completion_tokens: max_completion_tokens,
    tool_choice: tool_choice,
    stream_response: stream_response,
    allow_parallel_tool_calls: allow_parallel_tool_calls,
    anthropic_prompt_caching_enabled: anthropic_prompt_caching_enabled,
    bedrock_prompt_caching_enabled: bedrock_prompt_caching_enabled,
    open_ai_store_responses: open_ai_store_responses,
    open_router_data_collection: open_router_data_collection,
    open_router_zdr: open_router_zdr
  )

  model_completion.started!

  retry_with_backoff(model_completion) do
    perform_model_completion!(model_completion, &block)
    ensure_model_completion_present!(model_completion)
  end

  model_completion.completed!
  model_completion
rescue Raif::Errors::StreamingError => e
  Rails.logger.error("Raif streaming error -- code: #{e.code} -- type: #{e.type} -- message: #{e.message} -- event: #{e.event}")
  model_completion&.record_failure!(e) unless model_completion&.failed?
  raise e
rescue Faraday::Error => e
  Raif.logger.error("LLM API request failed (status: #{e.response_status}): #{e.message}")
  Raif.logger.error(e.response_body)
  model_completion&.record_failure!(e) unless model_completion&.failed?
  raise e
rescue StandardError => e
  model_completion&.record_failure!(e) unless model_completion&.failed?
  raise e
end

#deprecated? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/raif/llm.rb', line 73

def deprecated?
  !!deprecated
end

#deprecated_on ⇒ Object 



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# File 'app/models/raif/llm.rb', line 91

def deprecated_on
  lifecycle[:deprecated_on]
end

#deprecation_message ⇒ Object 



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# File 'app/models/raif/llm.rb', line 95

def deprecation_message
  message = +"Raif model :#{key} is deprecated"
  message << " and will be removed after #{retirement_date}" if retirement_date
  message << "."
  if replacement_key
    message << " Use :#{replacement_key} instead."
  elsif migration_note
    message << " #{migration_note}"
  end
  message
end

#lifecycle_status ⇒ Object

Manifest lifecycle conveniences. status is :active or :deprecated for models Raif ships (retired entries are never registered) and nil for a model a host app registered itself. The flat deprecated/retirement_date/ replacement_key/migration_note keyword arguments are what deprecated? and the warnings read; lifecycle is the manifest record and can be empty for a host-registered model.



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# File 'app/models/raif/llm.rb', line 83

def lifecycle_status
  lifecycle[:status]
end

#name ⇒ Object 



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# File 'app/models/raif/llm.rb', line 107

def name
  I18n.t("raif.model_names.#{key}", default: display_name || key.to_s.humanize)
end

#perform_model_completion!(model_completion, &block) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'app/models/raif/llm.rb', line 248

def perform_model_completion!(model_completion, &block)
  raise NotImplementedError, "#{self.class.name} must implement #perform_model_completion!"
end

#streaming_supported? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/raif/llm.rb', line 127

def streaming_supported?
  self.class.streaming_supported_for_key?(key)
end

#supports_batch_inference? ⇒ Boolean

Whether this model can be submitted through its provider's Batch API. Batch support is not uniformly provider-wide: xAI serves grok-4.5 on the synchronous endpoint but rejects it at batch-file validation, so the registry entry needs to be able to opt a single model out of a provider that otherwise supports batching. Defaults to the provider's capability.

Returns:

  • (Boolean) 


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# File 'app/models/raif/llm.rb', line 329

def supports_batch_inference?
  return provider_settings[:supports_batch_inference] if provider_settings.key?(:supports_batch_inference)

  self.class.supports_batch_inference?
end

#supports_faithful_required_tool_choice?(available_model_tools) ⇒ Boolean

Whether the provider can faithfully enforce tool_choice: :required for the given tool set. Override in subclasses when a provider can only enforce required tool use for some tool types.

Returns:

  • (Boolean) 


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# File 'app/models/raif/llm.rb', line 391

def supports_faithful_required_tool_choice?(available_model_tools)
  supports_required_tool_choice? && available_model_tools.present?
end

#supports_forced_tool_choice? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/raif/llm.rb', line 361

def supports_forced_tool_choice?
  supports_native_tool_use? && provider_settings.fetch(:supports_forced_tool_choice, true)
end

#supports_parallel_tool_calls? ⇒ Boolean

Whether this model can handle being asked to make multiple tool calls in a single response. Override (per provider or per model key) to return false for models that reject the parallel-tool-call request parameter or that produce worse results when allowed to batch. Agents consult this before enabling parallel tool calls; when false they fall back to one tool call per step.

Returns:

  • (Boolean) 


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# File 'app/models/raif/llm.rb', line 400

def supports_parallel_tool_calls?
  true
end

#supports_provider_managed_tool?(tool_klass) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/raif/llm.rb', line 342

def supports_provider_managed_tool?(tool_klass)
  supported_provider_managed_tools&.include?(tool_klass.to_s)
end

#supports_required_tool_choice? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/raif/llm.rb', line 365

def supports_required_tool_choice?
  supports_native_tool_use? && provider_settings.fetch(:supports_required_tool_choice, true)
end

#supports_structured_outputs? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/raif/llm.rb', line 377

def supports_structured_outputs?
  provider_settings.fetch(:supports_structured_outputs, true)
end

#supports_temperature? ⇒ Boolean

Provider settings come from the manifest (model_provider_settings) or a host's register_llm call. Without a setting a model is assumed to accept a temperature and native structured outputs. Adapters override these when the answer depends on more than settings (Anthropic and Bedrock default structured outputs to false).

Returns:

  • (Boolean) 


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# File 'app/models/raif/llm.rb', line 373

def supports_temperature?
  provider_settings.fetch(:supports_temperature, true)
end

#validate_provider_managed_tool_support!(tool) ⇒ Object 



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# File 'app/models/raif/llm.rb', line 404

def validate_provider_managed_tool_support!(tool)
  unless supports_provider_managed_tool?(tool)
    raise Raif::Errors::UnsupportedFeatureError,
      "Invalid provider-managed tool: #{tool.name} for #{key}"
  end
end

#validate_tool_choice_support!(choice) ⇒ Object

Raises:



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# File 'app/models/raif/llm.rb', line 381

def validate_tool_choice_support!(choice)
  supported = choice == :required ? supports_required_tool_choice? : supports_forced_tool_choice?
  return if supported

  raise Raif::Errors::UnsupportedFeatureError, "#{name} does not support #{choice} tool choice."
end