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OpenAI Launches GPT-5.6: Three Models Target Cybersecurity and Cost Efficiency

OpenAI officially released its GPT-5.6 model series on July 9, introducing three versions: Sol (flagship), Terra (mid-range), and Luna (economy). The lineup aims to reclaim industry leadership by focusing on cybersecurity and cost efficiency.

A Focus on Security

GPT-5.6 is positioned as OpenAI's most cybersecurity-focused model yet. It fully supports defensive security activities, including threat modeling, code review, vulnerability patching, and blue team exercises. This move comes amid regulatory scrutiny and aims to balance cutting-edge performance with compliance.

Benchmark Dominance

In the AI Coding Agent Index (ACI) benchmark, Sol scored 80 points, surpassing Anthropic's Fable5 by 2.8 points. More impressively, Sol uses less than half the output tokens and time of Fable5, at two-thirds the cost. Terra slightly outperforms Fable5, while Luna beats Opus4.8. CEO Sam Altman highlighted a 54% increase in token efficiency for coding tasks.

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Enterprise Expansion

OpenAI also launched ChatGPT Work, a dedicated office assistant for enterprise teams. Available on desktop, web, and mobile, it automates drafting documents, generating spreadsheets, and creating presentations, expanding OpenAI's footprint in collaborative office tools.

Pricing and Competition

The GPT-5.6 series pricing is set at $5/$30 per million input/output tokens for Sol, $2.50/$15 for Terra, and $1/$6 for Luna. With competitors like SpaceXAI and Meta releasing similar products, the global large model competition has shifted from parameter scale to scenario effectiveness and commercial cost-effectiveness.

Key Points

  • Three models: Sol (flagship), Terra (mid-range), Luna (economy)
  • Security focus: Supports threat modeling, code review, vulnerability patching
  • Benchmark lead: Sol scores 80 on ACI, surpassing competitors
  • Cost efficiency: Sol uses half the tokens and time at two-thirds the cost
  • Enterprise tool: ChatGPT Work for document automation
  • Pricing: Sol $5/$30, Terra $2.50/$15, Luna $1/$6 per million tokens