Google DeepMind recently introduced Gemini 4 Argon ( gemini-4-argon ) , marking a major architectural leap for long-horizon software engineering and 3D spatial reasoning: 1,000,000 Input / 1,000,000 Output Unified Token Horizon (a 15.6x increase in output capacity from 64K tokens via the Long-Decode Continuation Protocol) 87.0% SOTA on Embodied 3D Reasoning (ERQA) and 91.7% on LVBench (long video understanding) 77.9% SOTA on DeepSWE v1.1 (autonomous software engineering an...