OpenAI has officially launched its GPT-5.6 family, rolling out three tiers — Sol (flagship), Terra (balanced) and Luna (lightweight) — alongside a strategic desktop consolidation. GPT-5.6 Sol, the flagship model, comes within one point of Anthropic’s Claude Fable 5 on the Artificial Analysis Intelligence Index (59 vs 59.9) while costing roughly one-third as much per task. It leads the Coding Agent Index at 80 points, outperforming Fable 5 on software engineering benchmarks including Terminal-Bench 2.1 (91.9%). Pricing is set at $5/$30 per million input/output tokens for Sol, $2.50/$15 for Terra and $1/$6 for Luna. OpenAI also introduced two new reasoning modes: Max mode allocates additional compute for complex problems, while Ultra coordinates four agents in parallel. The Codex app is merging into a revamped ChatGPT desktop application, creating a unified interface that includes a built-in browser and computer control capabilities. This consolidation, led by Applications Chief Fidji Simo, is in response to apparent product fragmentation. ChatGPT Work combines ChatGPT with Codex’s engine, allowing users to delegate multi-step workflows across connected apps such as Slack, Google Drive and Microsoft 365. In early testing, OpenAI reported that nearly 100% of internal teams now use ChatGPT Work, with finance teams reducing month-end close from days to hours. The public launch was delayed after