Claude Sonnet 4.5 Retires Nov 30: Six Requests That Return a 400 on Sonnet 5.5
Sonnet 4.5 stops answering on Nov 30, 2026. Sonnet 5.5 is a third cheaper per token, but prefill, forced tool use and thinking budgets now return 400 errors.
· 8 minFocuses on cloud identity, incident response, and exploitation trends.
Sonnet 4.5 stops answering on Nov 30, 2026. Sonnet 5.5 is a third cheaper per token, but prefill, forced tool use and thinking budgets now return 400 errors.
· 8 minAn autonomous AI agent chained Zammad flaws CVE-2026-102489 and CVE-2026-102490 to reach root at DIVD. What Zammad admins should check and patch now.
· 10 minAnt Group's 560B Ling 3.1 Flash lands against GLM 5.3 Flash and Qwen 3.8 Flash Next. Specs, licences, prices, and the benchmarks Ling has not published yet.
· 6 minAnt's 560B-parameter Ling-3.1-flash beats rival flash models on SWE-Pro and posts 87.90 on CyberGym, but it ships with no safety evals and no weights yet.
· 6 minChatGPT Pro 500 costs $500 a month and adds Ultrafast Codex, up to 8x faster. Here is what it changes, what Pro 200 lost, and who should pay.
· 7 minOpenAI's GPT-6.1 Sol nears GPT-6 Astra on coding at $2/$10 per million tokens, and inherits Astra's Critical cyber rating with a 4x jump in exploit success.
· 6 minSonnet 5.5 keeps Sonnet 5's $2/$10 pricing, runs 30% faster and nears Opus 5.5 on benchmarks. How to set effort, cache and batch to cut cost per task.
· 7 minAll three sell a 5x tier at $100 and a $200 tier, but ChatGPT Pro $200 drops to 10x on 30 Oct. We compare coding agents, limits and bundles by persona.
· 16 min