Build advanced reasoning agents with GPT-5.6 Sol, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $4.00/1M input and $20.00/1M output tokens, native tool calling support. Access GPT-5.6 Sol via the OpenAI API with up to 128K output tokens.
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GPT-5.6 Sol by OpenAI costs $4.00 per 1M input tokens and $20.00 per 1M output tokens. Cached reads cost $0.40 per 1M tokens. Cache writes cost $5.00 per 1M tokens.