GPT-5.5 launched on April 23, 2026, and two weeks of Reddit reception split along three fault lines that no aggregator roundup captured cleanly. A leaked Codex system prompt forbidding “goblins, gremlins, raccoons, trolls, ogres, pigeons” went viral on r/ChatGPT (856 votes) and r/OpenAI (1.2K votes) before OpenAI’s own post-mortem dropped. Doubled output pricing at $30 per million tokens drew the loudest dissent on r/OpenAI’s launch thread , and a measurable 5.4 holdout faction emerged around hallucination regressions on factual recall workflows. This post is a Reddit-only community-reception snapshot bounded to the first 14 days.

Claude Opus 4.7 landed on April 16, 2026, and after the first 48 hours on X and Reddit the verdict is net-positive but heavily qualified. Power users are calling it state-of-the-art for agentic coding, long refactors, and the viral new Claude Design tool. The loudest complaints cluster around runaway token burn (roughly 1.5-3x more expensive in practice than 4.6), an “ambiguity tax” where the model no longer silently rescues vague prompts, and confidently broken output on marathon runs. Users who prompt like they are writing a spec are getting enormous leverage out of it. Users who prompt the way they used to prompt 4.6 are burning through their usage caps before lunch.