André Balleyguier @andrebalg
Applied AI Leader EMEA @AnthropicAI ex-@SnorkelAI & @datarobot. A French in London. AI/ML/Tech. Tweets reflect my own views. London Joined February 2010-
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@SuvanshSanjeev That's possible! Can't talk about that, but in my org we hire MTS at all levels!
@SuvanshSanjeev Still many roles are advertised below L6. We're still hiring at all levels!
@maxvonhippel @Defected_Saint I'm with you @maxvonhippel! I've hired a lot in in high-growth tech companies, it's better for both parties to be as honest and upfront as possible, and to cut the process short if it becomes evident it does not align. Win-win, less problems in the future, less time wasted.
@maxvonhippel @Defected_Saint Exactly – hiring is a two-way street!
@0xdoug Anthropic's revenue is far beyond software engineering or software workers.
@iankitxai @TheGeorgePu GPT-5.5 does NOT beat Mythos on cyber benchmarks. It beats Opus4.7... very different
Introducing Project Glasswing: an urgent initiative to help secure the world’s most critical software. It’s powered by our newest frontier model, Claude Mythos Preview, which can find software vulnerabilities better than all but the most skilled humans. anthropic.com/glasswing
@aarondotdev Did you read the paper? It studied junior devs *learning* a new library. The ones who used AI to understand concepts scored just as well as the no-AI group. The ones who copy-pasted blindly didn't. The conclusion isn't "AI is bad", it's that you need "think while you use AI".
@erroneous_input @ns123abc @sama The pentagon agreed to the terms of Anthropic (i.e "no use for fully autonomous or mass surveillance of Americans") but they added the redline "except bulk data analysis" which is the same as saying they can use it for anything, because any AI system does bulk data analysis...
@vdub12 @JoelStransky @ns123abc @sama If you think the AI is a military weapons system you are very wrong. The AI can support the creation of autonomous military weapons, but is far from being a weapon on its own. It would be the same as saying a bullet is a weapon if you have no gun.
It will significantly increase my opinion of @Anthropic if they do not back down, and honorably eat the consequences. (For those who are not aware, so far they have been maintaining the two red lines of "no fully autonomous weapons" and "no mass surveillance of Americans". Actually a very conservative and limited posture, it's not even anti-military. IMO fully autonomous weapons and mass privacy violation are two things we all want less of, so in my ideal world anyone working on those things gets access to the same open-weights LLMs as everyone else, and exactly nothing on top of that. Of course we won't get anywhere close to that world, but if we get even 10% closer to that world that's good, and if we get 10% further that's bad) CC @DarioAmodei firefly.social/post/bsky/pv7f…
Excited to share an example of the many projects we're driving @SnorkelAI around enterprise-specific environments and benchmarks - including detail on: - Domain-specific, enterprise env & tool development - Persona simulation for multi-turn eval - Nuanced rubrics & more!
We’re heading to #AAAI2026! Our accepted paper “Benchmarking Agents in Insurance Underwriting Environments” will be presented Jan 26 at the AAAI workshop. Stop by to learn more—@amanda_dsouza will be there to chat! Learn more about our benchmark: snorkel.ai/blog/building-…
Excited to share a preview of @SnorkelAI 's new Agentic Coding benchmark - testing models on realistic, multi-step software engineering tasks in fully sandboxed execution environments across a calibrated range of task domains and difficulties, inspired by our work with the @terminalbench team! With a top pass@5 score of 58% (Opus 4.5) - this new benchmark challenges the notion running wild on X right now that LLMs have "solved" software engineering. And, with both unit tests and both final-output and trajectory-level rubrics, it's already giving us & partners insights into where coding agents fail. Excited to share more here shortly! Link to benchmark & release post in 🧵👇
@nicolasmelo @Yuchenj_UW Anthropic valuation is 350Bn after the last Azure/Nvidia investment, trending to 500Bn according to some sources. Their growth YoY is also higher.
@emollick I find Opus 4.5 superior as it creates high quality Google Slides / PowerPoint that I can modify directly. Having to update prompts to iterate is a nightmare.
@krassenstein The ignorance in the comments of this post is what makes this post so good! Good job!!!
Don't say: "vLLM is fastest" or "Ollama is easiest." Wrong framing. The real answer isn't about features - it's about matching serving philosophy to your constraints. Local prototype vs. production scale vs. complex workflows = completely different frameworks.
I rejected a job offer yesterday. Not because of the salary. Not because of the tech stack. Not even because of the long hours they warned me about. But because, when I asked how they evaluate their AI systems, the hiring manager said: "We just ask it some questions and see if the answers sound right." I stared at them for a moment and realized... They just described the biggest problem in AI today. See, "sounds right" isn't a measurement. It's a hope. Here's what proper LLM evaluation actually looks like: - Accuracy: Can it get factual questions right? (Not 80% of the time. Consistently.) - Hallucination rate: How often does it make things up? (This should be near zero for critical applications.) - Bias metrics: Does it treat all groups fairly? (Measured across demographics, not assumed.) Real Evaluation Frameworks: - BLEU scores for translation quality Perplexity for language modeling Human evaluation with inter-annotator agreement Adversarial testing (red teaming) Domain-specific benchmarks (legal, medical, financial) The Process: > Define success criteria BEFORE deployment > Create diverse test sets (not just happy paths) > Measure consistently across model versions > Track performance over time (models drift) Have humans validate edge cases Why This Matters: Before proper evals: "Our model is amazing!" (based on cherry-picked examples) After proper evals: "Our AI achieves 94.2% accuracy on domain X, with known failure modes Y and Z" The difference? One builds trust. The other destroys it when reality hits. The kicker: Most companies are still in the "sounds right" phase. They're deploying models evaluated by vibes, not metrics. Just like you wouldn't join a team that deploys code without tests, you shouldn't join one that deploys AI without proper evaluation. What's your experience with LLM evaluation? Are we measuring what actually matters?
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