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ChatGPT Bug: GPT-5.5 and GPT-5.6 Responses Disappear After Generation

By PulseAugur Editorial · [1 sources] ·

Users are reporting a significant bug within ChatGPT where responses generated by GPT-5.5 and GPT-5.6 Sol models disappear immediately after completion. This issue has been observed across multiple platforms including Windows, iOS, and Android, and appears to be a regression in the platform's reliability. Technical investigation indicates that while the server sends a 200 OK status and completes the Server-Sent Events stream, the generated assistant message vanishes from the interface, leaving only the user's prompt visible. The problem is particularly disruptive for users engaged in long-form content creation. AI

IMPACT This bug could hinder user productivity and trust in ChatGPT's reliability for complex tasks.

RANK_REASON Bug report about a specific model variant's functionality on a platform.

Read on r/OpenAI →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

ChatGPT Bug: GPT-5.5 and GPT-5.6 Responses Disappear After Generation

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COVERAGE [1]

  1. r/OpenAI TIER_2 English(EN) · /u/echoabenteuer ·

    [Technical Bug Report] GPT-5.5 & GPT-5.6 Sol Responses Disappear After Completion – Cross-Platform Reproduction, HTTP 200 / SSE Complete, Possible ChatGPT Regression

    <!-- SC_OFF --><div class="md"><h1>Serious ChatGPT Reliability Regression – Technical Investigation and Cross-Model Findings</h1> <p><strong>Date:</strong> October 10, 2026<br /> <strong>Affected models:</strong> GPT-5.5 and GPT-5.6 Sol<br /> <strong>Additional observations:</str…

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