What are the three new models and what are they designed for?

Sol handles secure coding and cybersecurity tasks. Terra balances performance with GPT-5.5-level capability. Luna prioritizes speed and cost efficiency.

How much do these models cost to use?

Sol costs 5 dollars per 100K tokens input and 30 dollars per 100K tokens output. Terra costs 2.5 dollars per 100K tokens input and 15 dollars per 100K tokens output. Luna costs 1 dollar per 100K tokens input and 6 dollars per 100K tokens output.

When are these models available?

The three models are currently available in preview.

Large Language ModelsITmedia AI＋Jul 8, 2026Jul 8, 2026, 16:00 JST

OpenAI releases three new reasoning models in preview

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3 Key Points

What happened
OpenAI introduced three new AI models — Sol, Terra, and Luna — each designed for different tasks. Sol handles secure coding and cybersecurity work, Terra balances performance with GPT-5.5-level capability, and Luna prioritizes speed and low cost. All three are available in preview, with API pricing ranging from 1 token to 100 tokens per input and 6 tokens to 30 tokens per output, depending on the model.
Why it matters
The three models give developers and businesses a choice between speed, safety, and raw capability rather than a one-size-fits-all option. Organizations can now pick Sol for security-sensitive work, Terra for general-purpose reasoning, or Luna for cost-conscious applications — reducing unnecessary spending on more powerful models than needed.
What to watch
The models are currently in preview. Anthropic separately launched Claude Fable 5 in June and then halted development, restarting on July 1.

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Context & Analysis

OpenAI's release of three distinct reasoning models signals a shift from monolithic AI products toward specialized, use-case-optimized offerings. Rather than forcing all developers onto a single powerful (and expensive) system, the company is fragmenting its reasoning layer by speed, safety, and cost profile. This reflects the broader industry trend of moving beyond one-size-fits-all LLMs toward targeted deployments.

The pricing structure underscores the differentiation: Sol's 5-dollar input and 30-dollar output cost, Terra's middle-ground pricing, and Luna's 1-dollar and 6-dollar tiers create clear economic incentives for developers to match model to workload. Simultaneously, Anthropic's halt and restart of Claude Fable 5 development (paused after June, resumed July 1) suggests competitive pressure in the reasoning model space, with multiple vendors experimenting with tiered capability and cost strategies to capture different market segments.

FAQ

What are the three new models and what are they designed for?: Sol handles secure coding and cybersecurity tasks. Terra balances performance with GPT-5.5-level capability. Luna prioritizes speed and cost efficiency.
How much do these models cost to use?: Sol costs 5 dollars per 100K tokens input and 30 dollars per 100K tokens output. Terra costs 2.5 dollars per 100K tokens input and 15 dollars per 100K tokens output. Luna costs 1 dollar per 100K tokens input and 6 dollars per 100K tokens output.
When are these models available?: The three models are currently available in preview.

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