OpenAI/gpt-5.6-sol
OpenAI's flagship frontier language model designed for complex reasoning, professional knowledge work, advanced agents, and software engineering, featuring long-context processing, multimodal understanding, and powerful tool capabilities.
More from OpenAI
README
OpenAI/gpt-5.6-sol
GPT-5.6 Sol is OpenAI's flagship frontier model in the GPT-5.6 family, designed for complex professional work requiring the highest level of reasoning, coding ability, agent execution, and multimodal understanding. citeturn0search1
Specifications
| Item | Specification |
|---|---|
| Model | GPT-5.6 Sol |
| Model ID | gpt-5.6-sol |
| Developer | OpenAI |
| Input | Text, Image |
| Output | Text |
| Context Window | 1,050,000 Tokens |
| Max Output | 128,000 Tokens |
| Knowledge Cutoff | February 16, 2026 |
| Vision | ✓ Supported |
| Function Calling | ✓ Supported |
| Structured Outputs | ✓ Supported |
| Streaming | ✓ Supported |
| Reasoning Levels | none / low / medium / high / xhigh / max |
| Input Price | $5 / MTok |
| Output Price | $30 / MTok |
Key Capabilities
Frontier Reasoning
GPT-5.6 Sol provides the highest reasoning capability in the GPT-5.6 family, optimized for:
- Complex problem solving
- Professional analysis
- Strategic decision support
- Scientific reasoning
Advanced Software Engineering
Designed for:
- Large-scale code understanding
- Architecture design
- Debugging
- Refactoring
- AI coding agents
Long Context Understanding
Supports:
- 1.05M token context window
- Large repositories
- Enterprise documents
- Long-running workflows citeturn0search1
Agent Capabilities
Supports:
- Function calling
- Responses API
- Tool use
- Multi-agent workflows
Enabling advanced automation systems.citeturn0search3
Recommended Use Cases
- Enterprise AI agents
- Software engineering automation
- Research assistants
- Complex analysis
- Knowledge management
- Decision support systems
- Professional workflows
- Advanced automation platforms
Pricing
Tiered by input prompt tokens (incl. cache): once over the threshold, the whole request is billed at the higher tier.
| Token Type | Short context ≤272K | Long context >272K |
|---|---|---|
| input | $3.75$5.00-25% | $7.50$10.00-25% |
| output | $22.50$30.00-25% | $33.75$45.00-25% |
| cache_read | $0.375$0.50-25% | $0.75$1.00-25% |
| cache_write | $4.6875$6.25-25% | $9.375$12.50-25% |