GPT-5.6 Luna — AI Model Review & Pricing
GPT-5.6's fastest and most affordable tier. Built for high-volume, latency-sensitive workloads at $1/$6 per 1M tokens, with a 1.05M-token context window despite the low cost.
Specifications
| Attribute | Value |
|---|---|
| Lab | OpenAI |
| Tags | Fast Intelligent Coding |
| Release Date | 2026-07 |
| Context Window | 1,050,000 tokens |
| Input Price / 1M | $1.00 |
| Output Price / 1M | $6.00 |
| Input Modalities | Text |
| Output Modalities | Text |
Strengths
- Cheapest GPT-5.6 tier at $1/$6 per 1M tokens
- Fastest tier — built for latency-sensitive, high-volume workloads
- 1.05M-token context despite the low price point
- Good default for cost-sensitive production traffic
Weaknesses
- Lowest-capability tier — not for hard reasoning
- No Ultra mode or max reasoning-effort control
Best For
- High-volume chat and classification
- Latency-sensitive APIs
- Cost-sensitive production routing
In Depth: GPT-5.6 Luna
Draft layout · copy TKSummary
GPT-5.6 Luna is an AI model from OpenAI ranked #21 of 120 on the LMRank leaderboard.
Released 2026-07. It supports Text input and produces Text output, with a context window of 1,050,000 tokens. Input pricing is $1.00 per 1M tokens and output is $6.00 per 1M tokens on OpenRouter.