FrameworksLangChain18 May 2026
Tuning Deep Agents to Work Well with Different Models
Deep Agents was previously designed in a generic way to work well across model families. Today we’re adding model-specific profiles to adjust prompts, tools, and middleware. We ship profiles for OpenAI, Anthropic, and Google models out of the box, which we see leads to a 10–20 point jump on a subset of tau2-bench over the default harness.
LangChain BlogModelsOpen Source17 May 2026
Show HN: Semble – Code search for agents that uses 98% fewer tokens than grep
Hey HN! We (Stephan and Thomas) recently open-sourced Semble. We kept running into the same problem while using Claude Code on large codebases: when the agent can't find something directly, it falls back to grep, reading full files or launching subagents. This uses a lot of tokens, and often still misses the relevant code. There are existing tools for this, but they were either too slow to index on demand, needed API keys, or had poor retrieval quality.Semble is our solution for this. It combines static Model2Vec embeddings (using our latest static model: potion-code-16M) with BM25, fused via RRF and reranked with code-aware signals. Everything runs on CPU since there's no transformers involved. On our benchmark of ~1250 query/document pairs across 63 repos and 19 languages, it uses 98% fewer tokens than grep+read and reaches 99% of the retrieval quality of a 137M-parameter code-trained transformer, while being ~200x faster.Main features:-
Hacker NewsInfrastructureWeights & Biases4 May 2026
Weights & Biases at #NYTech Week
Tech Week is a16z’s annual conference — not one venue but hundreds of events across the country, drawing over 100,000 engineers, founders, and investors. This year we’re hosting five events across Boston and New York. Whether you’re a researcher, a builder, or somewhere in between, there’s something here for you. And if you use Weave […] The post Weights & Biases at #NYTech Week appeared first on Weights & Biases.
Weights & Biases BlogInfrastructureWeights & Biases4 May 2026
Weights & Biases at #BOSTech Week
Tech Week is a16z’s annual conference — not one venue but hundreds of events across the country, drawing over 100,000 engineers, founders, and investors. This year we’re hosting five events across Boston and New York. Whether you’re a researcher, a builder, or somewhere in between, there’s something here for you. And if you use Weave […] The post Weights & Biases at #BOSTech Week appeared first on Weights & Biases.
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