OpenAI Releases GPT-5.5 — Natively Omnimodal Architecture, 82.7% Terminal-Bench, 4M Weekly Codex Users

OpenAI·high signal

GPT-5.5 launched April 23-24 as OpenAI's first natively omnimodal model (text, images, audio, video in unified system). Leads Terminal-Bench 2.0 at 82.7% (+13 points over Claude Opus 4.7), scores 84.9% on GDPval (44 real occupations), and 74% on MRCR v2 at 1M tokens (doubling GPT-5.4). Priced at $5/$30 per million tokens. Codex powered by GPT-5.5 now reaches 4M developers weekly with 400K context window and 1.5x faster token generation.