Jev vs Fable 5.1 vs GPT-6 Astra isn't a normal model race: one classifies, two reason. Here's how they compare on cost, speed, accuracy, and best use.
Key takeaways
- Jev is a classifier: it answers structured questions with probabilities and can't write text. Fable 5.1 and GPT-6 Astra are frontier models that can.
- Jev lists input at $0.042 per million tokens with output free. Fable 5.1 and GPT-6 Astra both list at $10 input and $50 output per million.
- In 6,003 independent rubric checks, Jev matched Fable 5.1's verdict 91.5% of the time at $160 against $33,000 per million answers.
- Between the two frontier models, Fable 5.1 leads the independent Intelligence Index 66 to 61, while GPT-6 Astra leads most rows of OpenAI's own table.
- The best setup often uses Jev for fast decisions and Fable 5.1 or GPT-6 Astra for reasoning, in the same agent.
📖 Read the full guide on Van Data Team → Jev vs Fable 5.1 vs GPT-6 Astra: Which Model for Which Job
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