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ChatGPT Luna 5.6 (Luna) — as used by Vercel in tests (reported)

Reportedly, Vercel used OpenAI’s ChatGPT Luna 5.6 to run a classifier to review commands for safety; in Vercel’s reported test, replacing Luna 5.6 with TypeSafe AI’s Jev produced results 5–18× faster and with greater accuracy.

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CONTEXT WINDOW

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MODALITIES

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BENCHMARKS
Performance vs. TypeSafe AI’s Jev in Vercel test (reported)When Vercel replaced Luna 5.6 with TypeSafe AI’s Jev, Vercel reported results 5 to 18 times more quickly and with greater accuracy.
AVAILABILITY

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RELEASE TIMELINE

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2 SOURCES · IMPORTANCE 7.0

TypeSafe AI unveils Jev, a model that scores predefined options instead of generating text

Startup TypeSafe AI, co-founded by ex-OpenAI researcher Diogo Almeida, introduced Jev, a model designed to return narrow labels and probabilities (judgments) for developer-defined questions rather than free-form text. TypeSafe says Jev responds in 70–500 ms and is very cheap (listed at $0.042 per million input tokens), but its published benchmarks are limited, comparisons use the company's own workflows, and the model's "no hallucination" claim only applies to output structure, not correctness within allowed choices.

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VERIFIABLE FACTS

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WHAT CHANGED

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