Chinese Open-Weight Coding LLMs: 2026's Three-Week Sweep
May 11, 2026
In 17 days, GLM-5.1, Kimi K2.6, and DeepSeek V4 shipped frontier-tier open-weight coding LLMs at a fraction of Western prices. Inside the April 2026 wave.
#claude-opus-47
DeepSeek V4: Open-Weight Frontier at 1/7 the Cost
May 2, 2026
DeepSeek V4 ships 1.6T MoE open weights with 1M-token context: 80.6% on SWE-bench Verified at $1.74/$3.48 per million — roughly 1/7 the output cost of Claude Opus 4.7.
GPT-5.5: OpenAI's First Retrained Base Since GPT-4.5
April 24, 2026
OpenAI released GPT-5.5 on April 23, 2026 — the first fully retrained base since GPT-4.5. Benchmarks, $5/$30 API pricing, 1M context, and Opus 4.7 compared.
Claude Opus 4.7: Benchmarks, Features & Pricing
April 17, 2026
Claude Opus 4.7 leads SWE-bench Pro at 64.3% and OSWorld at 78.0%. Full breakdown of benchmarks, new features, pricing, and what changed from Claude Opus 4.6.