Provider Abstraction and Model Selection

A provider abstraction should standardize only what your product actually needs: text generation, streaming, structured output, tool calls, embeddings, or image input. Do not flatten meaningful differences between providers into a misleading lowest-common-denominator interface. Record model identifier, version or snapshot when available, configuration, latency, token usage, and evaluation results.

Model choice is a product decision. Compare task quality, latency, availability, context length, tool reliability, multimodal capability, data handling terms, and cost. Keep a fallback policy for temporary outages, but do not silently downgrade to a model that fails your quality or privacy requirements.

Small application adapter

export function createTextGenerator(client, model) {
  return {
    async generate({ instructions, input }) {
      const result = await client.responses.create({
        model,
        instructions,
        input
      });
      return {
        text: result.output_text,
        responseId: result.id
      };
    }
  };
}

💡 This example illustrates an adapter around a Responses-style API. Verify current SDK syntax and response fields against official documentation before shipping; provider APIs evolve.

Key Takeaways

Hide provider-specific response parsing behind an adapter.
Evaluate models on representative tasks.
Fallbacks must preserve safety, privacy, and minimum quality requirements.

Knowledge Check

What should be recorded when comparing model choices in production?

Provider Abstraction and Model Selection

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