Head-to-head comparisons
Two Builds, clear recommendation where evidence allows — or an honest no decisive winner. Stats use peer min-max public scores plus independent harness numbers.
Gemini 3.1 Pro vs GPT-5.6 Sol
Research multimancer vs coding ceiling — when is 96% SWE worth 2.5× the output tokens?
Enter Duel →DeepSeek V4 Pro vs Grok 4.5
Open-weight cost king vs alt-frontier value coding — both punch above their list price.
Enter Duel →DeepSeek V4 Pro vs GPT-5.6 Sol
Open-weight cost disruptor vs closed coding ceiling — when is 96% SWE worth 30× the tokens?
Enter Duel →Grok 4.5 vs GPT-5.6 Sol
Alt-frontier value coding vs OpenAI max-effort ceiling — price, tempo, and agentic STR.
Enter Duel →Claude Opus 4.8 vs GPT-5.6 Sol
Anthropic flagship architect vs OpenAI max-effort generalist — hard repos and judgment.
Enter Duel →Claude Opus 4.8 vs Claude Sonnet 5
Flagship ceiling vs daily driver inside Anthropic — when upgrading is worth it.
Enter Duel →How to read a Duel
Public STR/DEX/… numbers are ranks inside the current scored peer set (min ≈ 40, max ≈ 95). Independent tables (SWE Verified, pricing, TTFT) stay absolute. Prefer the Quest table over a single overall number.