Side-by-side comparison of GLM-5.1 (open-source, MIT license) vs GPT-5.4 and Gemini 3.1 Pro for coding tasks. Benchmarks, pricing, and real-world tradeoffs as of March 2026.
Honest review of Z.ai's GLM Coding Plan starting at $10/month. GLM-5.1 scores 94.6% of Claude Opus 4.6 in coding benchmarks — but is it ready to replace your Claude Pro subscription?