OpenAI's decision endpoint, announced at DevDay 2026. It focuses GPT-6 Luna on developer-defined questions that have a finite set of predefined answers, with text or image context, for classification, routing and an agent's next action.
Featherless AI's open server that turns a stock Hugging Face language model into a typed-decision endpoint. It reads the next-token logits for each question and builds the Choice, Score or Noul answer itself; no classifier head is trained and no JSON is generated.
Decides
choice, classify, route
choice, score, noul, classify, route
Architecture
gpt-6-luna
simple-jev
Fine-tuned from
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google/gemma-4-26b-a4b-it
License
proprietary
apache-2.0
Availability
Hosted API
Open weights + hosted API
Hosted by
OpenAI
Featherless AI
Input price
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Decision accuracy
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Calibration error
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Valid action rate
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Median latency
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p95 latency
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Figures are from each model’s manifest; accuracy and latency are what the publishers report, on their own suites and hardware. Add a third model.
Questions
What is the difference between decisions-api and simple-jev?
decisions-api is from OpenAI and simple-jev from Featherless AI. decisions-api is only available as a hosted API; simple-jev has open weights and a hosted API. Both answer choice, classify and route questions. Only simple-jev answers score and noul. decisions-api is licensed proprietary; simple-jev, apache-2.0.
Which is more accurate, decisions-api or simple-jev?
Neither publishes an accuracy figure. Test both on your own labelled examples.
Which is cheaper, decisions-api or simple-jev?
decisions-api: Hosted, price not published. simple-jev: Hosted, price not published, or free to self-host. Open weights cost nothing per call beyond your own hardware.
Can I run decisions-api or simple-jev locally?
simple-jev yes — systemone pull featherless-ai/simple-jev downloads its weights. The other is only served as a hosted API.
