OpenAI (AI company)OpenAIOpenAIto release / to launchfābù发布GPT-5.5 (AI language model)GPT-5.5GPT-5.5,describing it as / calling itchēng qí称其as / to bewéi为up to now / to dateqìjīn迄今the most capable / strongestzuì qiáng最强modifier particlede的modelmóxíng模型。
April 26, 2026 at 10:00 AM
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Science & TechnologyOpenAI Releases GPT-5.5, Calling It the Most Capable Model Yet
OpenAI launched GPT-5.5 on April 23, the first fully retrained base model in the series since GPT-4.5, with enhanced agentic capabilities.
OpenAI officially launched its latest artificial intelligence model GPT-5.5 this Thursday.
This is the first completely retrained foundational model in the series since GPT-4.5, with fully updated architecture and training data.
GPT-5.5 demonstrates outstanding performance in code writing, online research, and data analysis.
The new model supports an ultra-long context window of one million tokens, with significantly enhanced ability to process complex documents.
Paid subscribers can access the model through ChatGPT, with API input pricing at $5 per million tokens and output at $30 per million tokens.
OpenAI stated that GPT-5.5 can more autonomously complete complex work tasks from start to finish.
This release comes just six weeks after GPT-5.4, showing that AI large model iteration speed continues to accelerate.
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