GPT-5.6 Luna (batch)

OpenAI's lightweight model in the GPT-5.6 series, optimized for speed and efficiency, available in batch mode with a 1.05M token context window.

Strengths

Delivers fast inference and lower resource consumption while maintaining the extended context window of the GPT-5.6 series.

Best for

Batch processing workloads where speed and efficiency matter more than maximum reasoning capability, such as bulk document processing or high-volume tasks with tight latency constraints.

Limitations

Lighter weight than GPT-5.6 Terra and GPT-5.6 Sol means it trades some capability for speed; not intended for the most complex reasoning tasks where the flagship models would be more appropriate.