# `Puck.Backends.ReqLLM`
[🔗](https://github.com/bradleygolden/puck/blob/v0.2.25/lib/puck/backends/req_llm.ex#L2)

Backend implementation using the ReqLLM library.

ReqLLM provides a unified interface to multiple LLM providers.

## Model Specification

The model must include the provider in `"provider:model"` format:

    model: "anthropic:claude-sonnet-4-5"

## Configuration

Backend options are passed in the client tuple and forwarded to ReqLLM:

- `:temperature` - Sampling temperature (0.0 to 2.0)
- `:max_tokens` - Maximum tokens in response
- `:top_p` - Nucleus sampling parameter
- `:stop` - Stop sequences

## Examples

    # Basic usage
    client = Puck.Client.new({Puck.Backends.ReqLLM, "anthropic:claude-sonnet-4-5"})

    # With options
    client = Puck.Client.new(
      {Puck.Backends.ReqLLM, model: "anthropic:claude-sonnet-4-5", temperature: 0.7}
    )

See ReqLLM documentation for supported providers and additional options.

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*Consult [api-reference.md](api-reference.md) for complete listing*