GPT-5.5 Pro (batch)

OpenAI's highest-accuracy reasoning variant of GPT-5.5, optimized for deep reasoning and accuracy on complex, high-stakes workloads with a 1M+ token context window.

Strengths

Delivers superior accuracy and reasoning quality for complex professional problems where correctness is critical.

Best for

Deep reasoning tasks, high-stakes decision-making, and accuracy-critical workloads where reasoning depth matters more than speed.

Limitations

The batch variant trades real-time responsiveness for efficiency; for synchronous applications requiring immediate results, the standard GPT-5.5 Pro may be more suitable.