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Sourced model record · Catalog current through July 21, 2026

o3

A reviewed catalog record from OpenAI, released December 20, 2024. This page reports only what named sources publish about this exact record, with receipts.

API accessClosed weightsLanguage · Vision · Multimodal

What the evidence says

Developer
OpenAI
Released
December 20, 2024
Domains
Language · Vision · Multimodal
Tasks
Language modeling/generation · Question answering · Quantitative reasoning · Code generation · Visual question answering · Search · Instruction interpretation · Visual puzzles
Access
API access
Weights
Closed weights

Platform facts

OpenRouter's platform listing, retrieved July 22, 2026. Routed platform prices, not first-party provider prices.

Input price
$2.00 per 1M tokens
Output price
$8.00 per 1M tokens
Context length
200,000 tokens
Listed on OpenRouter
April 16, 2025

Common questions

What is o3?

o3 is a OpenAI model released December 20, 2024, according to Epoch AI's reviewed catalog record. The record classifies it under language, vision, multimodal.

How does o3 rank on LMArena?

No board Model Gauntlet mirrors currently lists this exact model revision under a reviewed identity, so no rating is reported here.

What does o3 cost?

OpenRouter lists it at $2.00 per million input tokens and $8.00 per million output tokens, retrieved July 22, 2026. Those are the platform's routed prices, not first-party provider prices.