GPT-5.6 Sol API Pricing & Cost Calculator
GPT-5.6 Sol is OpenAI's flagship-tier play. Compared to GPT-5.6 Terra's list price ($2/$12), it costs 2.5x on input and 2.5x on output - it only pays off when you actually need frontier reasoning.
GPT-5.6 Sol is OpenAI's premium reasoning tier in the 5.6 generation, alongside Terra (workhorse) and Luna (ultra-cheap). It competes directly with Claude Opus 5 at $5/$30.
By TechCompare · Updated
Calculator
Cost Comparison
Based on 100,000 input tokens (50% cached), 5,000 output tokens, and 100 requests.
How this is calculated
GPT-5.6 Sol is priced at $5.00 per million input tokens and $30.00 per million output tokens, matching GPT-5.5's rate. It supports a 90% prompt caching discount ($0.50 per million) and a 50% batch discount ($2.50 per million inputs, $15.00 per million outputs) via OpenAI's Batch API.
Verdict
GPT-5.6 Sol is OpenAI's flagship-tier play. Compared to GPT-5.6 Terra's list price ($2/$12), it costs 2.5x on input and 2.5x on output - it only pays off when you actually need frontier reasoning.
More API Standalones scenarios
Frequently asked questions
Should I pick GPT-5.6 Sol or GPT-5.6 Terra?
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