o3 is a well-rounded and powerful model across domains. It sets a new standard for math, science, coding, and visual reasoning tasks. It also excels at technical writing and instruction-following....
With CoreAI, you can start chatting with OpenAI: o3 instantly — no separate subscription needed. CoreAI lets you chat with OpenAI: o3 alongside 300+ other AI models from OpenAI and other providers like OpenAI, Anthropic, Google, Meta, and more.
Among the 392 chat models on CoreAI, OpenAI: o3 ranks #237 by context window — 200K tokens, roughly 150,000 words or 300 pages of text in a single conversation. On price, it is the #161 cheapest of 183 standard-tier models by input cost. It joined the catalog on 2025-04-16. 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 and OpenAI: GPT-4.1 side by side to judge with your own eyes.
A typical question (about 1,000 tokens in, 500 out) runs $0.00600 on OpenAI: o3's raw per-token rates; a heavy session with a 50K-token document costs about $0.140. On CoreAI you don't juggle these numbers — one subscription covers OpenAI: o3 and 300+ other models under a plan usage limit, with no API keys. See plans.
OpenAI: o3 handles 200K tokens of context — roughly 150,000 words, or about 300 pages of text in one conversation.
OpenAI: o3's underlying rates are $2 per 1M input tokens and $8 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 accepts image input, so you can attach screenshots, photos or diagrams and ask questions about them.
Yes. OpenAI: o3 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 in the model selector, and chat — no API key, no per-token billing. One subscription covers OpenAI: o3 and 300+ other models.
The closest alternatives on CoreAI are OpenAI: GPT-4.1, Anthropic Claude Haiku Latest, 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.
Chat with OpenAI: o3 and 300+ other AI models — all in one app.