DeepSeek V4: Open-Source Frontier at 1/6 the Cost
April 25, 2026
DeepSeek V4 launched April 24, 2026: open-source 1.6T MoE Pro scores 80.6% on SWE-bench Verified at $1.74/$3.48 per million — 1/6 the cost of Opus 4.7.
#gpt-55
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.