OpenAI GPT-5.6 Sol, Terra & Luna: Release Date & Pricing
OpenAI confirms July 9 launch of GPT-5.6 with flagship Sol, midrange Terra, and budget Luna. Full pricing, API costs, and 2026 benchmark breakdown.
The highly anticipated OpenAI GPT-5.6 series has a confirmed release date of July 9, 2026. In a departure from previous monolithic releases, OpenAI is segmenting the GPT-5.6 architecture into three distinct tiers: the flagship Sol, the highly optimized midrange Terra, and the edge-focused budget Luna. Sol boasts an unprecedented 2-million token context window and demonstrates a 40% improvement in complex reasoning tasks over GPT-4o.
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Meanwhile, the Terra and Luna variants are designed to capture the broader developer market. Terra offers GPT-4o-level performance at a fraction of the cost, while Luna is optimized for rapid, high-volume inference tasks like real-time text classification and simple chatbot routing. Early beta testers report that Terra hits the perfect sweet spot for 90% of standard application workloads, indicating an aggressive push to commoditize intelligence.