GPT-6.1 Sol - Apparently near-Astra performance for complex work at a lower cost.

# GPT-6.1 Sol Model | OpenAI API Source: [https://developers.openai.com/api/docs/models/gpt-6.1-sol](https://developers.openai.com/api/docs/models/gpt-6.1-sol) GPT\-6\.1 Sol delivers near\-Astra performance at a lower cost for complex coding, computer use, and professional work\. Compare it with Astra on your tasks to assess the tradeoff between quality and cost\. `reasoning\.effort`supports`low`,`medium`\(default\),`high`,`xhigh`, and`max`\. The`none`and`minimal`reasoning efforts are not supported\. Use the Responses API for tool calling\. Chat Completions is supported without tool calling\. GPT\-6\.1 Sol supports US and EU data residency\. Fast mode is unavailable with EU data residency\. See[data residency eligibility](https://developers.openai.com/api/docs/guides/your-data#which-models-and-features-are-eligible-for-data-residency)\. See[GPT\-6\.1 Sol in the GPT\-6 guide](https://developers.openai.com/api/docs/guides/latest-model?model=gpt-6-astra#gpt-61-sol)and[model\-selection guidance](https://developers.openai.com/api/docs/guides/model-selection#when-to-consider-gpt-61-sol)\.