OpenAI launches GPT-5.6 family with Sol, Terra, and Luna variants
Original: OpenAI launches its new family of models with GPT-5.6
Why This Matters
GPT-5.6's tiered pricing and benchmark claims signal intensifying direct competition with Anthropic in the enterprise AI market.
OpenAI unveiled GPT-5.6 on July 9, 2026, in three tiers: Sol (flagship), Terra (mid-range), and Luna (budget). CEO Sam Altman stated Sol is 54% more token-efficient for coding tasks. The models are available via ChatGPT, Codex, and the OpenAI API at tiered pricing.
OpenAI launched its GPT-5.6 model family on Thursday, July 9, 2026, introducing three variants targeting different use cases and budgets. Sol, the flagship tier, is positioned as OpenAI's 'best coding model yet,' priced at $5 per million input tokens and $30 per million output tokens. Terra, the mid-range option, is priced at $2.50/$15, while the budget-friendly Luna is offered at $1/$6. CEO Sam Altman told CNBC that Sol is 54% more token-efficient on AI coding tasks than prior models. OpenAI describes GPT-5.6 as its 'strongest cybersecurity model yet,' supporting threat modeling, code review, patching, and blue teaming. The Trump administration had previously sought to restrict its rollout over misuse concerns. Alongside the models, OpenAI released ChatGPT Work, an enterprise-focused workplace assistant available on desktop, web, and mobile for tasks such as drafting documents, spreadsheets, and presentations. Citing the Artificial Analysis Coding Agent Index, OpenAI claims Sol scores 80—2.8 points above Anthropic's recently released Fable 5—while using less than half the output tokens, taking less than half the time, and costing roughly one-third less. Terra is said to perform just above Fable 5, and Luna outperforms Anthropic's Opus 4.8. The launch follows similar releases this week from SpaceXAI and Meta.