GPT-5.6 Sol Leads Coding Benchmarks But Costs More Per Output Token Than Claude Opus 4.7
OpenAI's GPT-5.6 Sol scores highest on the standardized coding and agentic benchmarks all three labs report, including SWE-Bench Verified at 80.0% versus Gemini 3 Pro's 76.2%, while Anthropic declined to publish that benchmark for Claude Opus 4.7 at all. On price, Opus 4.7 undercuts Sol by 17% on output tokens ($25 versus $30 per million), making it the cheaper option for agentic workloads where output dominates cost. None of the three vendors disclose parameter counts, training compute, or architecture details, so the entire capability comparison rests on selectively chosen benchmarks that each lab controls.