GPT-5.6 Sol is OpenAI's flagship model, released July 9, 2026. It delivers state-of-the-art performance across coding, knowledge work, cybersecurity, and science — outperforming previous frontier models at lower cost per token.
| Model | Role | Input (per 1M tokens) | Output (per 1M tokens) |
|---|---|---|---|
| Sol | Flagship — highest capability | $5.00 | $30.00 |
| Terra | Balanced daily work | $2.50 | $15.00 |
| Luna | Fast and cost-efficient | $1.00 | $6.00 |
Sol is designed for complex tasks requiring deep reasoning, multi-step execution, and agentic coordination. Terra handles everyday professional work, while Luna is best for high-volume, latency-sensitive applications.
- Multi-agent orchestration — Ultra mode coordinates parallel agents for demanding multi-step tasks
- Computer use — Operates across applications, files, and browsers autonomously
- Programmatic tool calling — Writes and runs code in-memory, coordinates tools, processes intermediate results
- 200K token context — Handles large codebases, long documents, and extended conversations
- Zero Data Retention compatible — Tool calling supports ZDR for compliance
- Outperforms GPT-5.5 and Claude Opus on coding, reasoning, and agentic benchmarks
- Lower cost per token than competing frontier models despite higher capability
- Unified desktop app combining ChatGPT, Codex, and ChatGPT Work
- Available across Plus, Pro, Business, and Enterprise plans
- Strong design judgment reduces need for manual refinement
- Usage-based billing for ChatGPT Work — costs scale with task complexity
- Requires stable internet connection — no offline mode
- Higher-tier features (Ultra mode) limited to Pro and Enterprise plans
- Gradual rollout — not all regions have immediate access at launch
Visit gpt-5-6.github.io for the full installation guide and desktop setup instructions.
GPT-5.6 Sol is available on ChatGPT, ChatGPT Work desktop app (Windows and macOS), Codex, and the OpenAI API.