# OpenAI Previews GPT-5.6 Series: Sol, Terra, Luna

> OpenAI has begun a limited preview of GPT-5.6, a three-model family rather than a single release. Sol is the flagship, with OpenAI claiming gains in coding, biology and cybersecurity plus a new maximum reasoning effort and an ultra mode that farms parts of a task out to subagents. Terra is pitched as a cheaper workhorse, roughly twice as cheap as GPT-5.5, and Luna as the fastest and cheapest of the three. Preview pricing runs from $5 and $30 per million tokens for Sol down to $1 and $6 for Luna. The unusual part is the rollout. At the request of the U.S. government, the preview is restricted to about 20 trusted partner organizations behind a government safety review, with broader access promised for mid to late July. That gating is becoming a pattern for frontier launches, and it signals how tightly the most capable models are now entwined with official oversight. For everyday users the takeaway is simple: a faster, tiered GPT is coming, but you will likely wait weeks to touch it.

_Section: [Daily AI Updates](https://www.wortins.com/daily-ai) · Source: OpenAI · Published Thursday, July 9, 2026_

## Wortins' read

OpenAI has begun a limited preview of GPT-5.6, a three-model family rather than a single release. Sol is the flagship, with OpenAI claiming gains in coding, biology and cybersecurity plus a new maximum reasoning effort and an ultra mode that farms parts of a task out to subagents. Terra is pitched as a cheaper workhorse, roughly twice as cheap as GPT-5.5, and Luna as the fastest and cheapest of the three. Preview pricing runs from $5 and $30 per million tokens for Sol down to $1 and $6 for Luna. The unusual part is the rollout. At the request of the U.S. government, the preview is restricted to about 20 trusted partner organizations behind a government safety review, with broader access promised for mid to late July. That gating is becoming a pattern for frontier launches, and it signals how tightly the most capable models are now entwined with official oversight. For everyday users the takeaway is simple: a faster, tiered GPT is coming, but you will likely wait weeks to touch it.

## Source

[Read the full story at OpenAI](https://openai.com/index/previewing-gpt-5-6-sol/)

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