Wrote up some notes on the API version of GPT-5's hidden system prompt – it definitely adds today's date and appears to add other stuff too I'd really like to see this documented by @OpenAIDevs – as an API user I want visibility into the whole prompt! https://
simonwillison.net/2025/Aug/15/gp
t-5-has-a-hidden-system-prompt/
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GENERATIVE AI
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GPT-5 Hidden System Prompt Transparency Request
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Grok 4 Performance: Code vs Information Gathering Capabilities
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Grok 4 is pretty good. When it comes to code, it underperforms Claude and GPT-5 for me. But for information gathering, it’s really solid.
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OpenAI Reasoners vs Non-Reasoners: Performance Comparison Analysis
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How do OpenAI reasoners compare to non-reasoners? Looking at the @lmarena_ai rankings, we can compare models’ overall ratings with their category ratings, and clear patterns emerge. Reasoners (o3, o4-mini, GPT-5-Thinking) are much better at Maths and Hard Problems, while
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o3-Pro outperforms GPT-5 in code generation tasks
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o3-Pro seems smarter than GPT-5 to me. It’s definitely been better at code than 5 for me.
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Major Prompt Injection Vulnerabilities Found in Leading AI Products
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Took some time today to catch up with @wunderwuzzi23
's Month of AI Bugs and wow… 15 examples so far of major prompt injection vulnerabilities in products including ChatGPT, Codex, Cursor, Amp, Devin, Claude Code, GitHub Copilot and Google Jules -
AI Stack Fundamentals Need Major Improvements Across All Layers
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Every part of the AI stack – semiconductors, GPUs, Python, PyTorch, LLMs, post-training, etc. – is in major need of improvement.
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20 Year Evolution of AI in Cybersecurity Automation
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The 20 year evolution of AI in cybersecurity has resulted in lots of positive automation, starting with expert systems, then ML over datasets, then ML in endpoint defense and threat intelligence, then GenAI tacked onto existing solutions and now fully AI-native security… pic.twitter.com/x0CJDahbd4
— Bob Gourley – e/acc (@bobgourley) 15 août 2025The 20 year evolution of AI in cybersecurity has resulted in lots of positive automation, starting with expert systems, then ML over datasets, then ML in endpoint defense and threat intelligence, then GenAI tacked onto existing solutions and now fully AI-native security
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GPT-5 Gets Warmer, Friendlier Tone in Latest Update
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We’re making GPT-5 warmer and friendlier based on feedback that it felt too formal before. Changes are subtle, but ChatGPT should feel more approachable now. You'll notice small, genuine touches like “Good question” or “Great start,” not flattery. Internal tests show no rise in
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GPT-OSS demonstrates impressive safety maximization features
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Ohh nice to see how safemaxxed gpt-oss is!
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vLLM Pull Request 22845 Merged Soon
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That'd be cool! Here's the PR: https://
github.com/vllm-project/v
llm/pull/22845
… (but should be merged very soon)