OpenAI: GPT-5.6 Luna Pro

OpenAI: GPT-5.6 Luna Pro is a text model from Openai, with a 1.1M-token context window, priced at $1.00 in · $6.00 out / 1M. On Fully Informed you can add OpenAI: GPT-5.6 Luna Pro to a multi-model panel, where it answers independently, debates the other models and gets cross-checked for blind spots.

OpenAI: GPT-3.5 Turbo$0.50 in · $1.50 out / 1MOpenAI: GPT-3.5 Turbo (older v0613)$1.00 in · $2.00 out / 1MAnthropic: Claude Fable Latest$10.00 in · $50.00 out / 1MAnthropic Claude Haiku Latest$1.00 in · $5.00 out / 1MAnthropic: Claude Opus Latest$5.00 in · $25.00 out / 1MAnthropic Claude Sonnet Latest$2.00 in · $10.00 out / 1M

What is OpenAI: GPT-5.6 Luna Pro?

GPT-5.6 Luna Pro is the same underlying model as [GPT-5.6 Luna](https://openrouter.ai/openai/gpt-5.6-luna), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode

What is the context window of OpenAI: GPT-5.6 Luna Pro?

OpenAI: GPT-5.6 Luna Pro supports a 1.1M-token context window.

How much does OpenAI: GPT-5.6 Luna Pro cost?

OpenAI: GPT-5.6 Luna Pro is priced at $1.00 in · $6.00 out / 1M via OpenRouter.

What are alternatives to OpenAI: GPT-5.6 Luna Pro?

Comparable text models include OpenAI: GPT-3.5 Turbo, OpenAI: GPT-3.5 Turbo (older v0613), Anthropic: Claude Fable Latest, Anthropic Claude Haiku Latest.