We analyzed a year of agent research across 4 tasks: deep research, RAG indexing, agentic search and coding. Found that first asking ‘Is thi…

We analyzed a year of agent research across 4 tasks: deep research, RAG indexing, agentic search and coding. Found that first asking ‘Is this task verifiable?’ exposed inefficiencies in the agent architecture that were worth optimizing before reaching for the scaling lever. That’s our verifiability litmus test: > If you can't verify the task → aggregate > If you can verify it → generate cheaply and spend your budget on the check Full write up here: https://www.ai21.com/blog/the-verifiability-litmus-test-for-agent-design/ There's one question you should ask before you build an agent. Most people skip it (and pay for it in compute). Over a year of agent research at @AI21Labs across deep research, RAG indexing, agentic search and coding, and it comes down to this: can a candidate answer be checked a…

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Source: AI21 Labs (X) | 2026-10-06