GPT-5.6 Luna

Preview

OpenAIProprietary

Lowest-cost GPT-5.6 preview variant in the Sol/Terra/Luna rollout. Access remains limited while U.S. government reviewers evaluate security and misuse concerns.

Official page ↗

Specifications

License: Proprietary
Weights: Not released
Architecture: unknown
Parameters: Undisclosed
Context window: 1.5M tokens
Max output: 128K tokens
Knowledge cutoff: Jan 31, 2026
Price (in / out, $/M): —
Modalities: TextVisionAudioCode

Benchmarks

No benchmark scores recorded yet. Spotted some? Submit a correction.

Vendor-reported figures are claims until independently verified. See methodology.