ChatGPT Models Guide: Unlocking the Power of GPT o3-mini and More

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OpenAI offers multiple ChatGPT models in 2026: GPT-4o, GPT-4o mini (free), GPT-4.5, o3, o3-pro, o4-mini, and o1. Each model differs in reasoning ability, speed, context window, and pricing. These guides compare all available ChatGPT models with benchmarks, use-case recommendations, and pricing breakdowns. ChatGPT Toolbox, a Chrome extension with 16,000+ users, works with every ChatGPT model and adds folders, search, and export to organize your conversations.

Frequently Asked Questions

OpenAI offers GPT-4o, GPT-4o mini (free), GPT-4.5, o3, o3-pro, o4-mini, and o1 in 2026. Free users get GPT-4o mini, while Plus and Pro subscribers access the full model lineup including reasoning-optimized o3 and o3-pro.

The best ChatGPT model depends on your task — o3 excels at complex reasoning and math, GPT-4o offers the best balance of speed and intelligence, and GPT-4o mini is ideal for quick everyday tasks. ChatGPT Toolbox (16,000+ users) works with all models and helps you organize conversations by model type using folders.

GPT-4o is OpenAI's fast multimodal model optimized for speed and general tasks, while o3 is a reasoning-focused model that uses chain-of-thought processing for complex math, coding, and logic problems. o3 is slower but significantly more accurate on challenging benchmarks.

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Five bar charts arranged in a two-row layout. Each chart compares the performance of various OpenAI models across different benchmarks. The top-left chart is titled “AIME 2024 – Competition Math” and shows that model o1 achieves 74.3% accuracy, o3-mini scores 87.3%, o3 (no tools) scores 91.6%, and o4-mini (no tools) reaches 93.4%. The top-middle chart, titled “AIME 2025 – Competition Math,” shows a similar pattern: o1 gets 79.2%, o3-mini scores 86.5%, o3 (no tools) reaches 88.9%, and o4-mini (no tools) leads with 92.7%. The top-right chart is titled “Codeforces – Competition Code” and uses ELO ratings instead of percentages: o1 has 1891, o3-mini scores 2073, o3 (with terminal) hits 2706, and o4-mini (with terminal) slightly surpasses it at 2719. On the bottom-left, the chart titled “GPQA Diamond – PhD-Level Science Questions” shows o1 at 78.0%, o3-mini at 77.0%, o3 (no tools) at 83.3%, and o4-mini (no tools) at 81.4%. The bottom-right chart, “Humanity’s Last Exam – Expert-Level Questions Across Subjects,” features seven bars with the following scores: o1-pro at 8.12%, o3-mini at 13.40%, o3 (no tools) at 20.32%, o3 (python + browsing + tools) at 24.90%, o4-mini (no tools) at 14.28%, o4-mini (with python + browsing) at 17.70%, and Deep research at 26.60%. All bars are color-coded in light-to-dark yellow tones based on model performance.

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