LangChain reports that over the last month Claude Sonnet 5 rose from #9 to #2 in model adoption, with 51% more organizations using it. GPT-5.6 Luna climbed from #3 to #1 in call footprints, up 65% in calls, while smaller, faster models dominate call footprints overall. Two open-weights models entered the adoption top 10 but do not lead in call volume.
LangSmith Signals from the last month:
✅ Claude Sonnet 5: #9 to #2 in model adoption. 51% more orgs using it
✅ gpt 5.6 luna: #3 to #1 in call footprints. 65% more calls
✅ Two open-weights models are now in the adoption top 10, but not for call volume
✅ Smaller, faster models dominate call footprints
Source: LangChain · x.comPublished · added here
