Model Presets

langchain4clj provides a collection of pre-configured model presets that simplify model creation with sensible defaults.

Overview

Presets are namespaced keywords that identify specific model configurations:

:openai/gpt-4o - OpenAI GPT-4o
:anthropic/claude-sonnet-4 - Anthropic Claude Sonnet 4
:google/gemini-2-5-flash - Google Gemini 2.5 Flash

Usage

(require '[langchain4clj.presets :as presets])
(require '[langchain4clj.core :as lc])

;; Get a preset and create a model
(def model 
  (lc/create-model 
    (presets/get-preset :openai/gpt-4o 
                        {:api-key "sk-..."})))

;; Override any preset values
(def custom-model
  (lc/create-model
    (presets/get-preset :anthropic/claude-sonnet-4
                        {:api-key "sk-ant-..."
                         :temperature 0.5
                         :max-tokens 2000})))

Available Presets

OpenAI Models

Preset	Model	Description
`:openai/gpt-4o`	gpt-4o	Latest GPT-4o model
`:openai/gpt-4o-mini`	gpt-4o-mini	Smaller, faster GPT-4o
`:openai/gpt-4-1`	gpt-4.1	GPT-4.1
`:openai/gpt-4-1-mini`	gpt-4.1-mini	GPT-4.1 Mini
`:openai/gpt-4-1-nano`	gpt-4.1-nano	GPT-4.1 Nano
`:openai/o1`	o1	OpenAI o1 reasoning model
`:openai/o1-mini`	o1-mini	OpenAI o1-mini reasoning model
`:openai/o3`	o3	OpenAI o3 reasoning model
`:openai/o3-mini`	o3-mini	OpenAI o3-mini reasoning model
`:openai/o4-mini`	o4-mini	OpenAI o4-mini
`:openai/o4-mini-reasoning`	o4-mini	o4-mini with reasoning enabled

Anthropic Models

Preset	Model	Description
`:anthropic/claude-3-5-haiku`	claude-3-5-haiku	Fast, efficient model
`:anthropic/claude-haiku-4-5`	claude-haiku-4-5	Latest Haiku - fast & capable
`:anthropic/claude-sonnet-4`	claude-sonnet-4	Balanced performance
`:anthropic/claude-sonnet-4-reasoning`	claude-sonnet-4	With extended thinking
`:anthropic/claude-sonnet-4-5`	claude-sonnet-4-5	Latest Sonnet - enhanced
`:anthropic/claude-sonnet-4-5-reasoning`	claude-sonnet-4-5	With extended thinking
`:anthropic/claude-opus-4`	claude-opus-4	Most capable model
`:anthropic/claude-opus-4-reasoning`	claude-opus-4	With extended thinking
`:anthropic/claude-opus-4-1`	claude-opus-4-1	Enhanced Opus
`:anthropic/claude-opus-4-1-reasoning`	claude-opus-4-1	With extended thinking

Google Gemini Models

Preset	Model	Description
`:google/gemini-1-5-flash`	gemini-1.5-flash	Fast Gemini 1.5
`:google/gemini-1-5-pro`	gemini-1.5-pro	Capable Gemini 1.5
`:google/gemini-2-5-flash`	gemini-2.5-flash	Latest Gemini 2.5 Flash
`:google/gemini-2-5-flash-lite`	gemini-2.5-flash-lite	Lighter Gemini 2.5
`:google/gemini-2-5-pro`	gemini-2.5-pro	Most capable Gemini
`:google/gemini-2-5-flash-reasoning`	gemini-2.5-flash	With thinking enabled
`:google/gemini-2-5-pro-reasoning`	gemini-2.5-pro	With thinking enabled

Preset Configuration

Each preset includes sensible defaults:

Standard Models

{:temperature 1.0
 :max-tokens 4096
 :max-retries 3
 :timeout 60000}

Reasoning Models

{:temperature 1.0
 :max-tokens 8192
 :max-retries 3
 :timeout 120000
 :thinking {:enabled true
            :return true
            :send true
            :effort :medium}}

API Reference

`get-preset`

Get a preset configuration, optionally with overrides.

(presets/get-preset :openai/gpt-4o)
;; => {:provider :openai :model "gpt-4o" :temperature 1.0 ...}

(presets/get-preset :openai/gpt-4o {:temperature 0.5})
;; => {:provider :openai :model "gpt-4o" :temperature 0.5 ...}

`available-presets`

List all available preset keys.

(presets/available-presets)
;; => (:openai/gpt-4o :openai/gpt-4o-mini :anthropic/claude-sonnet-4 ...)

`presets-by-provider`

Group presets by provider.

(presets/presets-by-provider)
;; => {:openai [:openai/gpt-4o :openai/gpt-4o-mini ...]
;;     :anthropic [:anthropic/claude-sonnet-4 ...]
;;     :google [:google/gemini-2-5-flash ...]}

`get-provider`

Extract the provider from a preset key.

(presets/get-provider :openai/gpt-4o)
;; => :openai

Environment Variables

Presets work seamlessly with environment variable resolution:

(lc/create-model
  (presets/get-preset :openai/gpt-4o
                      {:api-key [:env "OPENAI_API_KEY"]}))

See ENV_RESOLUTION.md for more details.