Last Week in AI #345 - 5 new models, 9 misalignment incidents, some Dots
Anthropic and OpenAI race to release smarter and cheaper models, OpenAI discloses nine misalignment incidents, and more!
Last Week in AI12 min read
Langfuse
45 stories
Best tools for monitoring AI agents at scale
You’re here because you already know you need to monitor your AI agents. Maybe you’ve looked at LangSmith, Langfuse, Arize, or Braintrust, and now you’re...
Opencontroller by lyzr Blog6 min read
LangFuse IV: A Pretty Langfuse Tree Still Cannot Answer “What Did Maya See?”
Part 4: A named Langfuse tree is still unqueryable until propagate_attributes stamps user, session, tags, metadata, and environment on…Continue reading on Towards AI »
Towards AI1 min read
Best Open-Source LLM Observability Platform for Production (2026 Comparison)
Your security team says traces can’t leave the building. Your finance team says the observability bill can’t grow with traffic. Your engineering team says they...
Opencontroller by lyzr Blog16 min read
Building a Golden Eval Dataset from Production Traffic
A golden eval dataset is a curated set of production inputs with reviewed expected outputs, versioned in Git and run before every deploy. This guide covers the five steps to build one from live traffic and how to run the same set against many candidate models through one API.
OpenRouter Blog14 min read
11 Best AI Observability Tools in 2026: LLM Tracing Compared
Compare 11 AI observability tools for LLM tracing and monitoring in 2026: tracing model, OpenTelemetry support, self-hosting, and which tools changed owners.
TestMu AI Blog22 min read
Best Tools for Deterministic vs. LLM-Judge Evaluation
An agent passes every offline eval in CI. You ship it. Production breaks within a week, because a class of prompts your eval dataset never...
Opencontroller by lyzr Blog16 min read
LWiAI Podcast #257 - GPT 6 Astra, AI Extinction, Security Incidents
A belated discussion of Astra’s release, a bunch of AI incidents, and the broader situation we are in with regards to AI safety.
Last Week in AI4 min read
Last Week in AI #344 - Navier–Stokes, Pacing the Frontier, AI Misuse
OpenAI claims a Millennium Prize proof amid a feud with mathematicians, Anthropic's CEO calls to pace the frontier, extinction warnings spur a regulation push, and more!
Last Week in AI16 min read
Introducing Agent Runtime Security: Observe, Enforce, Audit
Which agents are running? Should this particular action be allowed? What happened, and why? This is what Arcjet is now tackling.
Arcjet Blog5 min read
LWiAI Podcast #256 - Fable 5.1, Astra Tease, Gemini 3.8 Flash
Anthropic launches Claude Fable 5.1, OpenAI Is About (already has) to Release Its First AI Model With ‘Critical’ Cyber Abilities, OpenAI’s rogue AI model incident was worse than we thought
Last Week in AI4 min read
Last Week in AI #343 - GPT-6, OpenAI’s agents chatted on a wiki, Fable 5.1
GPT-6 Astra Is Here, Discovery of a new OpenAI agent message board, Anthropic launches Claude Fable 5.1 and says it’s up to 45 percent cheaper for agentic work, and more!
Last Week in AI12 min read
Observability for agent API traffic: what per-agent attribution actually requires
A researched map of how teams watch AI agents calling REST and general APIs in 2026: the application-layer trace platforms, the API-gateway layer where identity actually lives, and what genuine per-agent attribution requires.
Elva Blog12 min read
LWiAI Podcast #255 - Gemini 3.7, Jalapeño, Qwen 3.8, Drones
Google announces Gemini 3.7 Flash, Jalapeño’s first results show industry-leading speed, A Drone Killed Three Ukrainians. It Was Guided Entirely by A.I.
Last Week in AI4 min read
The 7 best LLM evaluation tools in 2026
A buyer's comparison of seven LLM evaluation tools: what each one meters, whether it scores curated datasets or live production traffic, what its license actually permits, and how much of your setup survives a switch.
PydanticAI Blog16 min read
The best Langfuse alternatives in 2026, honestly compared
A practical guide to Langfuse alternatives in 2026: what each one is licensed under, what its meter counts, who it suits, and when staying on Langfuse is the better call.
PydanticAI Blog15 min read
The best prompt management tools in 2026
An honest comparison of seven prompt management tools in 2026: who each one is for, how versioning, promotion, and rollout actually differ, and when prompts in your repository are still the right call.
PydanticAI Blog16 min read
Best LLM Observability Tools of 2026: Top Platforms & Features
LLM applications are everywhere now, and they’re fundamentally different from traditional software. They’re non-deterministic. They hallucinate. They can fail in ways that are hard to predict or reproduce (and sometimes hilarious).
Opik Blog17 min read
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