openai announced a limited preview of its gpt-5.6 sol model line, structured in three tiers: sol (flagship), terra (mid-tier at roughly half the cost of gpt-5.5), and luna (fast, affordable). the release notes stronger cyber capabilities with layered safeguards. separately, hong kong-listed z.ai launched glm-5.2, matching anthropic performance benchmarks at 25 percent of the cost per token — timed to land immediately before anthropic's anticipated ipo. a jefferies strategist publicly compared the pricing impact to deepseek's january disruption.