Model Platform RivalriesRivalry

Open source models catching up to Sonnet on evals

April 7, 2026Flo Crivello, This Week in Startups

Flo Crivello and TWiST discuss open models narrowing the gap, including a claim that an OSS model beat Sonnet 4.6 on internal evals and that open models have historically lagged by about six months.

Okay this one seems real. First time ever an OSS model beats Sonnet 4.6(!!) on our evals.
Now begins vibe testing, but this is promising.
“Open models have been about six months behind for the last few years.”
Flo Crivello
This Week in Startups
open modelsevalsopen sourceopen models

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