GPT-5.6: 3 Models, 30x Price Spread, 1 Enterprise Decision
OpenAI just split GPT-5.6 into three models — Sol ($5/$30), Terra ($2.50/$15), and Luna ($1/$6) per million tokens. Sol beats Anthropic's restricted Mythos on TerminalBench. Terra matches GPT-5.5 at half the cost. The release is limited to ~20 organizations under a new U.S. government review process, but the pricing and benchmarks are public. Here's how to classify your workloads across all three tiers and prepare for migration before general availability.
June 26, 2026 · 17 min read