April 2026 marks the most competitive three-way frontier model race in AI history. Qwen 3.6 Plus, Claude Opus 4.6, and GPT-5.4 all cross the 1-million-token context threshold. Here's exactly where each model wins, loses, and what it means for developers.
Z.ai (formerly Zhipu AI) releases GLM-5.1, scoring 45.3 on coding benchmarks — just 2.6 points behind Claude Opus 4.6. Trained entirely on Huawei chips, open-source under MIT license, and starting at $3/month. Here's what the benchmarks actually show and what's still unverified.
