GPT-5.6 Luna
High-volume, latency-sensitive tasks like classification, extraction, and chat.
GPT-5.6 Luna supersedes GPT-5.4 Mini, GPT-5.4 Nano, GPT-5 Mini, GPT-5 Nano, o3-Mini, GPT-4o Mini.
What are GPT-5.6 Luna's specs and price?
GPT-5.6 Luna, built by OpenAI, ships a 400K-token context window and a 64K-token max output, released 2026-06. It supports text and vision input and costs $0.45 per million blended tokens, the 10th-cheapest of 32 models we track.
Specs
| Context window | 400K tokens |
| Max output | 64K tokens |
| Modalities | text, vision |
| Extended thinking | No |
| Released | 2026-06 |
| Knowledge cutoff | 2026-03 |
| Provider | OpenAI |
Verified 2026-08-08 — source.
Where it ranks
Strengths
- Cheapest current GPT-5.6 tier
- Low latency for high-volume calls
- Vision input included
More about GPT-5.6 Luna
FAQ
What is GPT-5.6 Luna's context window?
GPT-5.6 Luna has a 400K-token context window and a 64K-token max output — the 12th-largest context of the 32 current models we track. Source: https://platform.openai.com/docs/models, verified 2026-08-08.
Does GPT-5.6 Luna support vision or audio input?
Yes — GPT-5.6 Luna accepts vision input in addition to text.
Does GPT-5.6 Luna have a reasoning or extended-thinking mode?
No — GPT-5.6 Luna does not expose a separate reasoning/extended-thinking mode.
When was GPT-5.6 Luna released, and what is its knowledge cutoff?
GPT-5.6 Luna was released 2026-06 with a knowledge cutoff of 2026-03.
How much does GPT-5.6 Luna cost, and who provides it?
GPT-5.6 Luna is served by OpenAI at $0.45/M blended tokens (3:1 input:output) — the 10th-cheapest of 32 current models. Full pricing breakdown: /llm-api-pricing/gpt-5-6-luna.