GPT-5.6 Luna Pro
Parameters
Undisclosed
Context Length
1.05M
Modality
Multimodal
Architecture
Undisclosed
License
Proprietary
Release Date
9 Jul 2026
Knowledge Cutoff
-
API Pricing (per 1M)
Input: $0.20 · Output: $1.20
Evaluation Benchmarks
No evaluation benchmarks for GPT-5.6 Luna Pro available.
Rankings
Overall Rank
-
Coding Rank
-
About GPT-5.6 Luna Pro
GPT-5.6 Luna Pro is an enhanced reasoning tier of OpenAI's GPT-5.6 Luna model configured with pro reasoning mode. It is optimized for complex problem solving, high-accuracy classification, and agentic workflows requiring rigorous deliberation.
Technical Specifications
Architecture specifications are undisclosed for proprietary models.
About GPT-5.6
OpenAI's GPT-5.6 series represents the next-generation frontier intelligence family structured into three tiered variants: Sol (flagship reasoning and autonomous agents), Terra (balanced everyday production workhorse), and Luna (lightweight, ultrafast, cost-effective inference). It introduces new max and ultra (sub-agent coordination) reasoning modes, native programmatic tool calling, a 1M token context window with 128k output tokens, and a February 16, 2026 knowledge cutoff.