DeepSeek V4.1 Tool Calling Allegedly Regresses, Breaks 100-Step Agent Workflow
MaziyarPanahi · x · 2026-09-11
A developer reports DeepSeek-V4.1-Flash via OpenRouter shows a big drop in tool calling accuracy, breaking his 100+ step clinical agent workflow, while the older V4-Flash-0731 completes it fine. He questions whether the issue lies with the model, the provider, or the serving setup — unverified, but suggesting a possible regression in the new version.
Related event: DeepSeek-V4.1-Flash Regression Breaks 100-Step Agent Workflows(2 posts)→
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