ChatGPT Personal Finance: OpenAI's Plaid Launch in 2026
May 16, 2026
OpenAI launched ChatGPT Personal Finance for Pro users on May 15, 2026 via Plaid. Read-only bank links, GPT-5.5 reasoning, and why it isn't actually first.
#gpt-55
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.
GPT-5.5 Cyber Eval: AISI Finds Parity with Mythos 2026
May 8, 2026
UK AI Security Institute's April 30 GPT-5.5 cyber eval reveals parity with Claude Mythos on expert CTF tasks and the 32-step Last Ones attack range.
GPT-5.5 Instant: ChatGPT's New Default Model in 2026
May 6, 2026
OpenAI's GPT-5.5 Instant replaces GPT-5.3 as ChatGPT's default model on May 5, 2026, cutting hallucinations 52.5% on medicine, law, and finance prompts.
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.