The o-series of models are trained with reinforcement learning to think before they answer and perform complex reasoning. The o3-pro model uses more compute to think harder and provide consistently...
With CoreAI, you can start chatting with OpenAI: o3 Pro instantly — no separate subscription needed. CoreAI lets you chat with OpenAI: o3 Pro alongside 300+ other AI models from OpenAI and other providers like OpenAI, Anthropic, Google, Meta, and more.
OpenAI: o3 Pro holds the #237 spot for context size out of 392 chat models in the CoreAI catalog — 200K tokens, roughly 150,000 words or 300 pages of text in a single conversation. On price, it is the #57 cheapest of 64 premium-tier models by input cost. It joined the catalog on 2025-06-10. It supports step-by-step reasoning (thinking mode) and accepts image input.
Every model in this table is available on CoreAI — open the web app and run the same prompt through OpenAI: o3 Pro and OpenAI: GPT-5.2 Pro side by side to judge with your own eyes.
A typical question (about 1,000 tokens in, 500 out) runs $0.0600 on OpenAI: o3 Pro's raw per-token rates; a heavy session with a 50K-token document costs about $1.400. On CoreAI you don't juggle these numbers — one subscription covers OpenAI: o3 Pro and 300+ other models under a plan usage limit, with no API keys. See plans.
OpenAI: o3 Pro handles 200K tokens of context — roughly 150,000 words, or about 300 pages of text in one conversation.
OpenAI: o3 Pro's underlying rates are $20 per 1M input tokens and $80 per 1M output tokens. On CoreAI it is included in one subscription alongside 300+ models, so there is no per-token billing to manage.
Yes — OpenAI: o3 Pro accepts image input, so you can attach screenshots, photos or diagrams and ask questions about them.
Yes. OpenAI: o3 Pro can work through problems step by step before answering; on CoreAI you can toggle thinking mode per message.
Open the CoreAI web app or the iOS/Android app, pick OpenAI: o3 Pro in the model selector, and chat — no API key, no per-token billing. One subscription covers OpenAI: o3 Pro and 300+ other models.
The closest alternatives on CoreAI are OpenAI: GPT-5.2 Pro, Anthropic: Claude Opus 4.5, inclusionAI: Ling-2.6-flash — similar tier and capability. The fastest way to choose is running one prompt through them side by side in CoreAI's Compare view.
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