Models · OpenAI
GPT-5.6 Luna
GPT-5.6 Luna is the fast, cost-effective model in the 5.6 family. It punches above its weight on everyday tasks like summarization, classification, and simple coding while keeping costs low.
Input $1.00 per 1M tokens
Output $6.00 per 1M tokens
Context 256K tokens · $7.00 combined per 1M
Benchmark performance
Source: Artificial Analysis. Updated 2026-09-20.
Key strengths
- — Excellent price-performance ratio
- — Very low latency
- — Good for high-throughput batch processing
- — Handles common tasks reliably
Best use cases
- Text summarization and classification
- Simple code generation
- Content moderation pipelines
- High-volume chat applications
Pricing details
| Input (per 1M tokens) | $1.00 |
| Output (per 1M tokens) | $6.00 |
| Context window | 256K tokens |
| Architecture | Lightweight dense transformer, 256K context window, optimized for speed and efficiency |
| Provider | OpenAI |
Fast, cost-effective
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Pricing data is sourced from official API documentation and updated weekly. Actual costs may vary based on prompt caching, batch processing, service tiers, and regional pricing. Inblix is not affiliated with OpenAI.