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OpenAI: GPT-5.6 Sol Pro

Openaitext
9.6 / 10 Overall Rating

Developed by OpenAI, GPT-5.6 Sol Pro runs on an extended reasoning engine designed for complex logic, math, and code synthesis. It features a massive 1.05M token context window and 128K max output limit, outperforming GPT-4o and Claude 3.5 Sonnet on deep analytical tasks at $2.00/$10.00 per million tokens.

Context Window
1050K
Knowledge Cutoff
2025
Max Output
16K
License
Proprietary

Where it Excels (Pros)

  • 1.05M token context window
  • 128K max output generation limit
  • Deep extended pro reasoning mode

Limitations (Cons)

  • Higher latency from detailed reasoning
  • Increased reasoning token usage costs

Benchmark Breakdown

Reasoning (MMLU)94%
Coding (HumanEval)92%
Mathematics (MATH)90%
Long-Context Retrieval95%

Pricing Matrix

Input cost / 1M tokens$2.00
Output cost / 1M tokens$10.00
Visit OpenAI: GPT-5.6 Sol Pro website↗

Compare OpenAI: GPT-5.6 Sol Pro with other frontier models:

vs Meta: Muse Spark 1.2 Contributor→vs DeepSeek: DeepSeek V4 Flash Vision Exp→vs Tencent: Hy-MT2-1.8B→

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