GPT 5.6 Sol is the best "vision" model OpenAI ever released
Summary
The Roboflow blog post reviews OpenAI's GPT-5.6 Sol, Terra, and Luna vision models, benchmarking their performance on object detection, counting, OCR, and data extraction. It notes Sol as the best vision model in the lineup to date, with Terra and Luna showing progress, discusses prompt formats, stability on large images, latency and cost, and suggests testing Sol in Roboflow Playground against other VLMs. Takeaways emphasize that Gemini 3.5 Flash remains cost-effective for high-volume tasks, and OpenAI is taking vision more seriously.