The "~openai/gpt-sol-latest" slug functions as a routing alias rather than a fixed model, always pointing to the newest entry in the OpenAI GPT Sol family and at the time of the snapshot resolving to GPT-5.6 Sol. Because the alias is dynamic, anything tied to it shifts whenever OpenRouter repoints to a newer release, so it is best understood as a "track the latest" handle for users who want to stay current without manually updating their model string.

OpenRouter's listing surfaces the model as reasoning-enabled, exposing step-by-step thinking through a reasoning request parameter whose reasoning details can be preserved across conversation turns to keep multi-step reasoning coherent. Developers interact with it through an OpenAI-compatible API by swapping in the "~openai/gpt-sol-latest" slug, which makes it straightforward to drop the alias into existing SDKs and code paths that already target OpenAI-style chat completions.