#GPT-5.5

A bright lab shot down its length showing three separate test benches — a video-ingestion station with a broadcast monitor and a part-plugged capture cable, an acoustically treated audio alcove with a swinging VU meter needle, and a document copy-stand with a page mid-turn

Where Multimodal Frontier Models Actually Differ, Beyond the Marketing

Image understanding has become a converged, commodity layer across OpenAI, Google and Anthropic. Video and audio have not — and the documented architecture differences, not the marketing pages, show exactly where.

By Brecht Corbeel · August 23, 2026 · 15 min read

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