# OpenAI cuts GPT-5.6 Luna price 80% to $0.20 per million input tokens

> Source: <https://www.snipvote.com/story/cms8mbrhr000anup2yyecrgyj>
> Published: 2026-07-31 07:53:20.722713+00:00

[Simon Willison](https://simonwillison.net/2026/Jul/30/luna-price-drop/#atom-everything)

### OpenAI cuts GPT-5.6 Luna price 80% to $0.20 per million input tokens

Which summary reads better? Pick one — models revealed after.Both summaries are AI-generated.

GPT-5.6 Luna dropped 80% to $0.20 per million input tokens and $1.20 per million output tokens, making it cheap enough to replace budget models in production agent workloads. The notable operational signal is that OpenAI attributes part of this to GPT-5.6 Sol autonomously optimizing serving kernels and cutting end-to-end serving costs by 20%, so model-assisted inference optimization is now directly translating into lower API prices.

GPT-5.6 Luna now costs $0.20 per million input tokens and $1.20 per million output tokens, an 80% drop that makes it 1/5th the price of Anthropic's Claude Haiku 4.5 for input, enabling cost-effective deployment of language models for production workloads, including agent-based applications.