Liquid AI's first decision model, served only through the Liquid API. Returns Choice, Score and Noul answers with probability distributions and zero output tokens, on the /v1/systemone request shape used by TypeSafe's SDK.
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.
Decides
choice, score, noul, classify, route
choice, classify, route
Architecture
d1
gpt-6-luna
Fine-tuned from
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License
proprietary
proprietary
Availability
Hosted API
Hosted API
Hosted by
Liquid AI
OpenAI
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 d1 and decisions-api?
d1 is from Liquid AI and decisions-api from OpenAI. Both are only available as a hosted API. Both answer choice, classify and route questions. Only d1 answers score and noul.
Which is more accurate, d1 or decisions-api?
Neither publishes an accuracy figure. Test both on your own labelled examples.
Which is cheaper, d1 or decisions-api?
d1: Hosted, price not published. decisions-api: Hosted, price not published. Open weights cost nothing per call beyond your own hardware.
