Architecture review benchmark: Gemini 4 Argon scores 74%, behind Opus 5.5 and Astra
A reviewer had frontier models critique a full architecture plan; Opus 5.5 scored 95%, Astra 77% and Gemini 4 Argon 74%, testing reasoning, research and hallucination resistance.
I put together a massive plan for one of my projects: full architecture, a decision log, multiple execution paths, and dozens of hard technical trade-offs. Then I had frontier models critically review it. Not an easy test. It pushed planning, comprehension, reasoning, research, and hallucination resistance. Disputed claims were checked against primary sources and live tests. Results: Opus 5.5: 95% Fable 5.1: 85% Astra: 77% Gemini 4 Argon: 74% Qwen 3.8 Max: 73% GLM-5.3: 66% DeepSeek Flash: 65% Grok 4.7: 54% Opus 5.5 is hands down the best model in the world today.