GPT-5.6 Sol — reviews, specs & pricing

OpenAI's frontier model for complex professional work. 1.05M context, knowledge cutoff Feb 16 2026.

Summary

GPT-5.6 Sol represents OpenAI's absolute pinnacle of machine intelligence, specifically engineered to tackle ultra-complex reasoning challenges and autonomous agentic workflows. By prioritizing deep cognitive processing over raw speed, it excels at decomposing multi-step problems that leave lesser models stalled. While it carries a premium price tag and operates with higher latency, its unmatched analytical capabilities make it the definitive choice for enterprise-level decision making and advanced software engineering.

Sample use case

A pharmaceutical research enterprise deploys GPT-5.6 Sol to orchestrate autonomous multi-agent pipelines for drug discovery. The model acts as a master coordinator, analyzing vast biomedical datasets to identify target proteins, writing and self-correcting python code to run molecular simulations, and autonomously generating comprehensive regulatory compliance documentation.

Specifications

  • Provider: openai
  • License: closed
  • Context: 1050k tokens
  • Input price: $5/M tok
  • Output price: $30/M tok

Pros

  • Unmatched logical reasoning capabilities
  • Superb autonomous agent coordination
  • Flawless code generation and debugging
  • Excels at extremely complex multi-step tasks

Cons

  • Significantly higher latency
  • Premium, high-cost pricing tier
  • Inefficient for simple, conversational queries

Average rating 0.0 from 0 community reviews on Reviuws.

Benchmark results

BenchmarkScoreLatency
Factuality100.0%6.6s
Reasoning100.0%23.4s
Coding100.0%44.2s
Instruction Following80.0%17.3s

Measured by the Reviuws Bench suite on identical prompts. Compare these scores against every other model.

Frequently asked questions

What is GPT-5.6 Sol?

GPT-5.6 Sol represents OpenAI's absolute pinnacle of machine intelligence, specifically engineered to tackle ultra-complex reasoning challenges and autonomous agentic workflows. By prioritizing deep cognitive processing over raw speed, it excels at decomposing multi-step problems that leave lesser models stalled. While it carries a premium price tag and operates with higher latency, its unmatched analytical capabilities make it the definitive choice for enterprise-level decision making and advanced software engineering.

How much does GPT-5.6 Sol cost?

GPT-5.6 Sol costs $5 per million input tokens and $30 per million output tokens.

Is GPT-5.6 Sol open source?

GPT-5.6 Sol is released under the closed license.