OpenRouter API chat completions: setup guide

OpenRouter API provides a unified endpoint for accessing various large language models (LLMs) from providers like OpenAI, Anthropic, Google, Meta, and more, allowing users to simplify management by using a single API key and billing account. It facilitates over 2 million API requests daily and supports a wide range of models with features like automatic fallbacks and cost optimization for high-volume workloads. The endpoint accepts the same request format as OpenAI's Chat Completions API, making it compatible with existing OpenAI-based code. It enables users to create multi-model workflows for tasks such as model comparison, cost-tiered routing, and consensus decision-making, while also providing pricing transparency with a small markup on provider costs. OpenRouter is particularly beneficial for platforms like CodeWords, where it integrates seamlessly to enhance LLM access and workflow flexibility without the complexity of managing multiple API keys.

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