New GPT-5.6 Update: Cheaper and Faster!

Good news for those of you who frequently use the GPT-5.6 API. Today there is an important update that makes your workflow more cost-effective and efficient. GPT-5.6 Luna now has its price slashed by up to 80%, GPT-5.6 Terra is 20% more affordable, and there's a new Fast mode feature for GPT-5.6 Sol that delivers much faster responses.

Let's dive into the details of the price and performance changes for each model below.

GPT-5.6 Luna: 80% Price Cut and Faster Than Ever

GPT-5.6 Luna is the fastest and most affordable model specifically designed for tool usage and large-scale multi-step workflows.

Amazingly, Luna delivers performance equivalent to last year's top-tier model. Yet, its cost is only about 6 percent of the old model's task cost, with speed nearly 9 times faster!

Here are the latest pricing details for GPT-5.6 Luna:

• Input Token: $0.20 per 1 million tokens
• Output Token: $1.20 per 1 million tokens

This model is perfect if you need fast processing, large-scale automation, and a super tight budget.

GPT-5.6 Terra: Balanced Choice for Daily Work, Save 20%

If you're looking for a versatile model for everyday tasks, GPT-5.6 Terra is the answer. Terra combines intelligence, speed, and cost in a balanced way to make your daily operations more economical.

Latest pricing for GPT-5.6 Terra:

• Input Token: $2 per 1 million tokens
• Output Token: $12 per 1 million tokens

If you've been automatically using Sol for daily tasks that don't actually require top-tier intelligence, trying Terra is a smart step to save operational costs.

Fast Mode for GPT-5.6 Sol: Responses Up to 2.5x Faster

For API users who prioritize high speed, we're introducing Fast mode, which officially replaces the previous Priority Processing offering.

On GPT-5.6 Sol, Fast mode can deliver responses up to 2.5 times faster than standard processing. It does cost twice the standard price, but the intelligence level remains exactly the same with no reduction whatsoever.

It's also very easy to use and supports the existing system:

• Requests that already use the priority tag will automatically be switched to Fast mode.
• For new requests, simply add the parameter service_tier="fast".

Conclusion

This update gives you the freedom to choose the model that best fits your needs and budget. You can choose Luna for maximum cost efficiency, Terra for balanced daily work, or Sol with Fast mode for uncompromising speed.