GPT-5.6 Sol Pricing & Specs
GPT-5.6 Sol: OpenAI's Latest Frontier Model
OpenAI previewed the GPT-5.6 model family on June 26, 2026, with three tiers: Sol (flagship), Terra (mid-range), and Luna (efficient).
Pricing
| Model | Input | Output | Context |
|---|---|---|---|
| GPT-5.6 Sol | $5.00 / 1M tokens | $30.00 / 1M tokens | 128K |
| GPT-5.6 Terra | $2.50 / 1M tokens | $15.00 / 1M tokens | 128K |
| GPT-5.6 Luna | $1.00 / 1M tokens | $6.00 / 1M tokens | 128K |
Key Features
- Ultra mode — spawns sub-agents for parallel reasoning
- Extended thinking — adaptive compute allocation
- Government-limited access
- Rivals Claude Mythos 5