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o3

Il raisonne longuement avant de répondre : du calcul à l’inférence contre plus de justesse

OpenAI Modèle Fermé
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Le texte intégral est présenté en anglais ; le titre et le résumé sont localisés.

CE QUE C'EST

o3 is a reasoning model OpenAI released in April 2025, part of the o series. Unlike models that answer directly, it performs an internal chain of reasoning before producing its output, then derives the answer from that reasoning. The series is trained with reinforcement learning so the model learns to spend more reasoning steps when they buy a more reliable answer. o3 accepts text and image input and serves as the main version for mathematics, coding and scientific reasoning tasks.

Pourquoi il compte

It turned test-time compute into a product: by reasoning at length before answering, o3 spends more compute at inference to buy steadier correctness, and made this the default shape of mainstream reasoning models.

Caractéristiques clés

Type
Reasoning model
Context window
200K tokens
Modality
Text, image in; text out
Released
2025-04

Capacités

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