OpenAI releases GPT-5.6 with three variants after government security review

OpenAI will publicly launch all three GPT-5.6 variants — Sol, Luna, and Terra — on July 9, following approval from the Trump administration after a mandatory security review process.

The company initially released GPT-5.6 to a "small group of trusted partners" in late June under a June 2026 presidential AI cybersecurity order requiring companies to submit their most powerful models for government review 30 days before public release. OpenAI submitted the models voluntarily and received expedited approval in less than 30 days.

According to Axios, the Department of Commerce's Center for AI Standards and Innovation conducted additional testing, with OpenAI sending technical experts to Washington, DC to address questions and concerns in real time.

Three variants at different price points

GPT-5.6 comes in three configurations:

• Sol: OpenAI's strongest model yet at $5 per million input tokens and $30 per million output tokens
• Terra: Designed for everyday use, claims similar performance to GPT-5.5 at half the cost — $2.50 per million input tokens and $15 per million output tokens
• Luna: Lowest-cost option at $1 per million input tokens and $6 per million output tokens

OpenAI stated it was "expanding preview access globally now" via X (formerly Twitter). The company previously said it "doesn't believe this kind of government access process should become the long-term default" but complied to ensure a timely public release.

Industry-wide compliance

Anthropic also underwent similar government review for its Mythos cybersecurity and Fable models, blocking all access including to foreign nationals during the review period. The company has since received permission to redeploy the Mythos 5 model and will eventually release Fable 5.

What this means

The expedited review process suggests the government is developing faster protocols for AI model approval, though the precedent of mandatory pre-release reviews for frontier models remains controversial. The pricing structure shows OpenAI is segmenting capabilities across price tiers more aggressively than previous releases, with Terra positioned as a cost-optimized alternative to GPT-5.5 rather than a capability upgrade. Whether Sol represents a significant architectural advance or incremental improvement over GPT-5.5 remains to be demonstrated through independent benchmarks.