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Blended $/1M across tracked versions of this line.
Typical 3:1 output-to-input mix, per 1M tokens
Price as of 2026-04-28 · Source: legacy_model_catalog
Complex reasoning, analysis, planning and multi-step problem solving where answer quality matters more than raw cost.
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...
o3-pro is a Reasoning model from OpenAI (US). HotON.ai tracks it at $20.00 per 1M input tokens and $80.00 per 1M output tokens, with a 200K-token context window. Its composite efficiency score is 76/100 at an estimated $0.080 per successful task.
o3-pro is tracked at $20.00 per 1M input tokens and $80.00 per 1M output tokens. A typical 3:1 output-to-input workload blends to roughly $65.00 per 1M tokens. Figures are illustrative demo data.
Complex reasoning, analysis, planning and multi-step problem solving where answer quality matters more than raw cost.
o3-pro supports up to a 200K-token context window — large enough for long documents and extended conversations in a single request.
Within the HotON.ai tracked set, o3-pro is cheaper than 2% of models on input price and ranks #523 of 535 by overall efficiency.
Yes — grok-4-fast-non-reasoning is a lower-cost option at $0.50 per 1M output tokens, while still covering similar Reasoning use cases. Compare them side by side on HotON.ai.
Ready to paste into articles, papers or AI prompts — prices and date refresh with the live data.
HotON.ai — o3-pro (OpenAI): $20.00/1M input, $80.00/1M output, as of 2026-04-28. https://hoton.ai/en/models/openai-o3-proPricing is real (via the TestKey catalog, updated daily). Quality (Arena Elo) is real where the model is ranked on LMArena. Efficiency is a modeled composite of real price and context.