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A head-to-head benchmark comparison of GPT-5 vs Kimi K2 Thinking across 51 evaluations. GPT-5 leads on the most benchmarks (35).
"We are introducing GPT‑5, our best AI system yet. GPT‑5 is a significant leap in intelligence over all our previous models, featuring state-of-the-art performa.
Full GPT-5 specs →Today, we are introducing Kimi K2 Thinking, our best open-source thinking model. Built as a thinking agent, it reasons step by step while using tools, achieving.
Full Kimi K2 Thinking specs →Best result per row highlighted in cyan. Each benchmark links to its definition and sources; each model links to its full scorecard.
Across the 51 benchmarks compared here, GPT-5 leads on the most (35). The right choice still depends on your task — check the per-benchmark table above for coding, reasoning and math.
GPT-5 has the strongest result on Codeforces Elo among the models compared here. See the code-category rows in the table for the full picture.
This comparison covers 51 benchmarks on which at least one of the selected models has a published score.
Scores are aggregated from official model cards, technical reports and standard public evaluations, and link back to each benchmark's source. They are updated as new results are published.
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