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Model Comparison Series: Claude 4.5

Anthropic released the Claude 4.5 model family between September and November 2025, starting with Claude Sonnet 4.5 on September 29, 2025. This family includes 3 main models: * Claude Sonnet 4.5 (Sept 29, 2025): Announced as a top-tier model for coding and complex agent tasks. * Claude Haiku 4.

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Model Comparison Series: GPT-5.2

OpenAI dropped GPT-5.2 in December 2025. The update focused on three main areas: reasoning, coding, and long-document handling. It also claimed roughly 30% lower hallucination rates compared to the previous generation. Let’s start with where it actually performs. Strengths of GPT 5.2 1. Strong reasoning & coding