GPT-5.1 (batch)

GPT-5.1 (batch) is OpenAI's general-purpose reasoning model with a 400k token context window, optimized for asynchronous batch processing workflows.

Strengths

The model handles extended reasoning across large documents and codebases, managing complex multi-step tasks within its large context window.

Best for

Batch processing jobs where latency is not a constraint, such as analyzing large document collections, processing dataset batches, or running offline reasoning workloads.

Limitations

This model was superseded by GPT-5.2 (batch) in December 2025 and lacks the specialized reasoning capabilities of frontier-grade or coding-focused variants; real-time interactive use cases should use the standard (non-batch) endpoint instead.