Amazon Bedrock's OpenAI GPT-5.6 Terra / Luna has been reduced in price.
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Introduction
On July 30, 2026, AWS What's New announced a price reduction for OpenAI GPT-5.6 Terra and GPT-5.6 Luna on Amazon Bedrock. Terra was reduced by 20%, Luna by 80%, while GPT-5.6 Sol remains unchanged.
Below is a comparison of standard Input / Output unit prices (USD per 1M tokens).
| Model | Before Input | After Input | Before Output | After Output | Price Reduction Rate (Input / Output) |
|---|---|---|---|---|---|
| GPT-5.6 Luna | $1.00 | $0.20 | $6.00 | $1.20 | 80% |
| GPT-5.6 Terra | $2.50 | $2.00 | $15.00 | $12.00 | 20% |
| GPT-5.6 Sol | $5.00 | $5.00 | $30.00 | $30.00 | Unchanged |
Price Revision Announcement
According to the official OpenAI blog, the changes began rolling out to Amazon Bedrock on the day the revision took effect.
AWS What's New states that the standard Input / Output unit prices on Amazon Bedrock are the same as the API prices published by OpenAI. Additionally, usage on Bedrock counts toward existing AWS commitments.
The pre-revision unit prices in the table are the Bedrock unit prices confirmed in a prior article (as of July 14, 2026), and the post-revision unit prices are the API prices from the official OpenAI blog.
Summary
If you are using GPT-5.6 on Amazon Bedrock, this price revision changes the cost assumptions. In particular, Luna now allows you to leverage GPT-5.6 performance for general tasks while significantly reducing costs. Depending on the volume of input and output usage — especially the ratio of output — the savings could be substantial, and the cost-effectiveness is something worth keeping an eye on.
The following article introduces how GPT-5.6 Sol / Terra / Luna were used on Amazon Bedrock.
This month, the AI agent Kiro also added support for GPT-5.6.
This announcement was specifically about the Amazon Bedrock price revision, and no announcement was made regarding Kiro. We would also like to revisit the cost-effectiveness of using the post-revision GPT-5.6 with Kiro.
