Mirendil’s Fern 0.1 debuts with a claimed 10 million-token context window

Fern 0.1 is the first version of Mirendil’s first model, built from Mirendil-Base with a short round of post-training. The company claims Fern can hold up to 10 million tokens of context and pitches it for work with AI training data, logs and agent traces. Its long-context test results are company-reported. As of Oct. 26, 2026, Mirendil invited early access requests but labeled access “coming soon.”