OpenAI Cuts GPT-5.6 Luna Price 80%, Adds Faster Sol Tier
OpenAI slashed GPT-5.6 Luna's API price by 80% and Terra's by 20%, citing GPU efficiency gains, while adding a paid "Fast mode" for its top-tier Sol model.
Read more →GPT-5.6
GPT-5.6 is OpenAI’s model in the GPT-5 series, offered in multiple performance tiers — including Luna, Terra, and Sol — each with its own price and speed trade-offs. This hub tracks GPT-5.6 pricing and tier changes, new capabilities, and how it compares to other OpenAI models.
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GPT-5.6 Sol Rewrote OpenAI's GPU Kernels, Cutting Serving Costs 20%
OpenAI says its GPT-5.6 Sol model autonomously rewrote the GPU kernels behind its inference stack, cutting serving costs 20% and helping fund an 80% price cut for the lightweight Luna tier.
Read more →OpenAI Built an AI That Attacks Its Own Models to Harden Them
OpenAI says its new internal system, GPT-Red, found prompt-injection exploits far faster than human red-teamers and used them to make GPT-5.6 six times more resistant to attacks.
Read more →UK Safety Institute Finds Universal Jailbreak in OpenAI's GPT-5.6
OpenAI's newly published GPT-5.6 system card discloses that UK AI Security Institute testers built a universal jailbreak within hours, unlocking the model's cyber-attack capabilities.
Read more →OpenAI's GPT-5.6 Sol Ultra Claims Proof of 50-Year Math Conjecture
OpenAI says its GPT-5.6 Sol Ultra model produced a proof of the 50-year-old Cycle Double Cover Conjecture in under an hour, but mathematicians warn full verification will take weeks.
Read more →OpenAI Launches ChatGPT Work, Folds Codex Into Unified App
OpenAI merged its Codex coding tool into a single ChatGPT desktop app and introduced ChatGPT Work, a new agent for long, multi-step office tasks, alongside the general release of GPT-5.6.
Read more →OpenAI Makes GPT-5.6 Public, Ending Government-Gated Preview
OpenAI opened its GPT-5.6 model family — Sol, Terra and Luna — to all ChatGPT, API and Codex users on July 9, after weeks of government-mandated review limited access to select partners.
Read more →OpenAI Releases GPT-5.6 in Government-Gated Preview With Three New Models
OpenAI launched GPT-5.6 Sol, Terra, and Luna on June 26, restricting initial access to roughly 20 government-approved organizations in the first application of a new US federal voluntary review framework for frontier AI models.
Read more →OpenAI Previews GPT-5.6 Under US Government Restrictions
OpenAI unveiled three new models — Sol, Terra, and Luna — on June 26, but restricted access to government-vetted partners following a White House request on frontier AI oversight.
Read more →OpenAI Launches GPT-5.6 Family in Limited, Government-Supervised Preview
OpenAI unveiled three new models — Sol, Terra, and Luna — under the GPT-5.6 banner, with access currently restricted to a small group of trusted partners cleared by the U.S. government.
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