DeepSeek V4 vs GPT-5.5 vs Claude Opus 4.7: Model Guide
Dev.to AI
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Generative AI
Open Source AI
Today is the most chaotic single day in the 2026 AI model race. 📖 Read the full version with charts and embedded sources on ComputeLeap → Within a 24-hour window, OpenAI shipped GPT-5.5 - its most capable API model yet, with a 74% long-context score that doubles its predecessor - and DeepSeek responded within hours with two open-source models: V4-Pro (1.6 trillion parameters, MIT license) and V4-Flash (284B, equally open). Claude Opus 4.7, which launched April 16, has been the dominant coding model since. Now it has two new challengers on the same day. The timing is not a coincidence.