GPT-5.6 Luna: specs, pricing and how it performs in a council

GPT-5.6 Luna is OpenAI's model available on Council AI at $0.20 per million input tokens and $1.20 per million output, with a 1,050,000-token context window. GPT-5.6 high-volume tier (GA Jul 9, 2026). 1M context at $0.20/$1.20 after the Jul 30, 2026 OpenAI price cut — the cheapest frontier-class option in the lineup. On Council you do not run it alone: the same prompt goes to up to 10 models from different labs in parallel, and a moderator synthesizes one answer with a consensus score showing where the labs agreed.

GPT-5.6 Luna specifications

What GPT-5.6 Luna is good at

GPT-5.6 high-volume tier (GA Jul 9, 2026). 1M context at $0.20/$1.20 after the Jul 30, 2026 OpenAI price cut — the cheapest frontier-class option in the lineup.

Council surfaces it for: general, fast, high-volume.

It has native web search, so it can ground answers in current sources rather than training data alone.

GPT-5.6 Luna pricing on Council AI

Council does not resell tokens. Every paid plan carries a monthly budget and each model draws against it at cost: $0.20 in / $1.20 out per million tokens for GPT-5.6 Luna. Plans start at $19.99/mo (Plus), $39.99/mo (Pro) and $99.99/mo (Ultra, which adds the personal RAG library and MCP server).

If budget is the binding constraint, DeepSeek V4 Flash (0731) is the cheaper seat in the lineup at $0.14/$0.28.

Using GPT-5.6 Luna in a council

A single model — this one included — can be confidently wrong. Council runs GPT-5.6 Luna alongside models from other labs on the same prompt, then scores how much they agreed. High consensus is a signal you can act on the answer; low consensus surfaces the specific point they split on, which is usually the part worth checking yourself.

Other OpenAI models in the lineup: GPT-5.6 Sol, GPT-5.6 Terra.

Frequently asked questions