GPT-5.6 Sol
Last updated: August 11, 2026
Specs
| Vendor | OpenAI |
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| Released | July 9, 2026 |
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| Context window | 1.05M tokens |
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| Input | $5 / M tokens |
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| Output | $30 / M tokens |
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Benchmarks
Strengths
- Flagship of the GPT-5.6 series for complex reasoning and coding
- 1M-token context with document input
- Strong on long agentic workflows
Weaknesses
- The most expensive tier of the three
- Overkill for classification or routing
Best for
- Complex coding and refactors
- Long-horizon agents
- Analysis over large document sets
Compare with other AI models