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Polyglot resolves two config objects:
  • LLMConfig for inference
  • EmbeddingsConfig for embeddings

​
LLMConfig

<?php
use Cognesy\Polyglot\Inference\Config\LLMConfig;

$config = new LLMConfig(
    apiUrl: 'https://api.openai.com/v1',
    apiKey: 'sk-...',
    endpoint: '/chat/completions',
    model: 'gpt-4o-mini',
    maxTokens: 1024,
    contextLength: 128000,
    maxOutputLength: 16384,
    driver: 'openai',
    options: ['temperature' => 0.2],
);
// @doctest id="12b3"
Key fields:
  • driver: which inference driver to use (openai, anthropic, openai-compatible, etc.)
  • apiUrl, endpoint, apiKey: transport/auth settings
  • model, maxTokens, contextLength, maxOutputLength
  • metadata, queryParams, pricing, options

​
EmbeddingsConfig

<?php
use Cognesy\Polyglot\Embeddings\Config\EmbeddingsConfig;

$config = new EmbeddingsConfig(
    apiUrl: 'https://api.openai.com/v1',
    apiKey: 'sk-...',
    endpoint: '/embeddings',
    model: 'text-embedding-3-small',
    dimensions: 1536,
    maxInputs: 2048,
    driver: 'openai',
);
// @doctest id="a9ad"
Key fields:
  • driver: embeddings driver (openai, cohere, gemini, etc.)
  • apiUrl, endpoint, apiKey
  • model, dimensions, maxInputs, metadata

​
Resolution Flow

<?php
use Cognesy\Polyglot\Inference\InferenceRuntime;
use Cognesy\Polyglot\Inference\LLMProvider;

$provider = LLMProvider::using('openai')
    ->withConfigOverrides(['model' => 'gpt-4o']);

$config = $provider->resolveConfig();          // LLMConfig
$runtime = InferenceRuntime::fromProvider($provider);
// @doctest id="3d18"
Embeddings flow is equivalent via EmbeddingsProvider and EmbeddingsRuntime.

​
DSN and Overrides

Both providers support DSN input: 
<?php
use Cognesy\Polyglot\Inference\LLMProvider;

$provider = LLMProvider::dsn('preset=openai,model=gpt-4o-mini,maxTokens=512');
$config = $provider->resolveConfig();
// @doctest id="3130"

​
Notes

  • Use driver, not providerType.
  • HTTP client selection is handled in runtime construction (InferenceRuntime / EmbeddingsRuntime), not as a config field.
  • Retry policy is explicit (withRetryPolicy(...)), not embedded in generic options.