GPT-5.5 Shines in Comprehensive AI Model Showdown Against Claude, Gemini, and DeepSeek

product#llm📝 Blog|Analyzed: Apr 26, 2026 13:52
Published: Apr 26, 2026 11:17
1 min read
Zenn GPT

Analysis

The release of GPT-5.5 marks an exciting leap forward in Generative AI, showcasing phenomenal improvements in Agent-based tasks and massive 1M Context Window handling. It is thrilling to see such fierce competition among frontier models like Claude Opus 4.7 and Gemini 3.1 Pro, each bringing unique strengths to the table from coding to general reasoning. Furthermore, the incredible cost-efficiency of DeepSeek V4-Pro highlights the rapidly expanding accessibility of top-tier AI technology for developers everywhere.
Reference / Citation
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"GPT-5.5 is OpenAI's first completely retrained base model since GPT-4.5, achieving a breakthrough score of 82.7% on Terminal-Bench 2.0 and 74.0% on the long-context MRCR v2 1M token benchmark."
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Zenn GPTApr 26, 2026 11:17
* Cited for critical analysis under Article 32.