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Grok 4.5 vs GPT-5.6 Sol: Complete Comparison
Grok 4.5 and GPT-5.6 Sol are both frontier coding-capable models, but they sit in different ecosystems.
Featured · Updated today · Last verified: July 2026 · Score 5
Choose Grok 4.5 when
Strong for agentic coding and engineering tasks, with Cursor availability as a major advantage.
Choose GPT-5.6 Sol when
OpenAI's newest flagship for complex coding and professional work.
Overview
Grok 4.5 and GPT-5.6 Sol are both frontier coding-capable models, but they sit in different ecosystems. Grok 4.5 is especially relevant for Cursor and xAI API users; GPT-5.6 Sol is the OpenAI flagship with broad Responses API tool support.
Recommendation
Grok 4.5 and GPT-5.6 Sol are both frontier coding-capable models, but they sit in different ecosystems.
Limitations and trade-offs
Pricing, limits, and regional availability can change quickly; verify vendor docs before rollout. This comparison is based on official public documentation and should be validated against internal evals.