GPT-5.6 Sol Pro (batch)

GPT-5.6 Sol Pro is OpenAI's flagship reasoning model with reasoning.mode set to pro for higher-quality responses, available in batch mode with a 1.05M token context window.

Strengths

Excels at complex reasoning, multi-step problem-solving, and coding tasks with the pro reasoning mode optimized for accuracy on difficult problems.

Best for

Batch workloads requiring deep reasoning and complex analysis where latency is not a constraint and quality is the priority.

Limitations

Batch-only availability means requests cannot be served in real-time; pro reasoning mode increases latency and processing overhead compared to standard Sol mode.