GPT-5.6 Luna
GPT-5.6 Luna
📌 Model Overview
Cost-efficient GPT-5.6 model for fast, high-volume workloads
GPT-5.6 Luna is a Api Only model developed by OpenAI, released on 2026-07-09. It is designed primarily for Chat Reasoning workloads. Featuring a 1.1M tokens context window and Undisclosed parameter count, it offers robust performance for enterprise integration, developers, and researchers.
✨ Key Features & Capabilities
| Feature | Description |
|---|---|
| Context Window | 1.1M tokens capacity for extended prompts and multi-turn workflows |
| Primary Task | Optimized for Chat Reasoning |
| Deployment | api-only |
| Modality | text, image, pdf |
| Max Output | Max Output: 128K tokens |
| Native reasoning capability | Native reasoning capability |
| Tool / function calling support | Tool / function calling support |
⚙️ Technical Specifications
| Specification | Details |
|---|---|
| Developer / Lab | OpenAI |
| Release Date | 2026-07-09 |
| Model Type | Api Only |
| Parameters | Undisclosed |
| Context Window | 1.1M tokens |
| License | Proprietary |
| Model Family | gpt-luna |
📊 Benchmarks & Performance
| Benchmark | Score | Source |
|---|---|---|
| SWE-Bench Pro | 62.7 (resolve rate) | Independent Eval |
| Terminal-Bench | 84.7% | Independent Eval |
| DeepSWE | 67.2 (resolve rate) | Independent Eval |
| GPQA Diamond | 92.3 (accuracy) | Independent Eval |
| FrontierMath | 78.6 (accuracy) | Independent Eval |
| BrowseComp | 83.3 (accuracy) | Independent Eval |
| OSWorld | 45.6% | Independent Eval |
| MMMU Pro | 78.4 (accuracy) | Independent Eval |
| Agents' Last Exam | 50.3 (score) | Independent Eval |
| Toolathlon | 53.4% | Independent Eval |
| Artificial Analysis Intelligence Index | 51.2 (index score) | Independent Eval |
| Artificial Analysis Coding Agent Index | 74.6 (index score) | Independent Eval |
💰 Pricing
| Tier / Unit | Rate (USD) |
|---|---|
| 1M input tokens | $1 |
| 1M output tokens | $6 |
| 1M cache read tokens | $0.1 |
📜 License & Usage
This model is governed by the Proprietary license. Please check official developer guidelines before commercial deployment.
Key Features
Max Output: 128K tokens
Native reasoning capability
Tool / function calling support
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Verified Sources
Tags
Model Specs
Parameters
Undisclosed
Context Window
1.1M tokens
License
Proprietary
Deployment
Pricing
- 1M input tokens$1
- 1M output tokens$6
- 1M cache read tokens$0.1
as of 2026-07-26
Lineage
Model Family
Part of the gpt-luna family
Only release in this line currently tracked.
Curator Notes
Skeleton entry imported from models.dev backfill (2026-07-26). Needs manual enrichment and primary-source verification.
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