AI · alternatives · 2026
24 alternatives to OpenAI o3-mini
Pushing the frontier of cost-effective reasoning
OpenAI o3-mini is a reasoning model designed for developers and AI practitioners who need cost-effective solutions for complex problems. It specializes in STEM fields including science, math, and coding tasks. The… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier.
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Advanced Visual Reasoning & Agentic Tool Use
2025 · openai.com · its alternatives →
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Open AI o3 API▲141Advanced reasoning models with safety-first innovation.
2024 · openai.com · its alternatives →
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OpenAI o1 API ▲458OpenAI's most advanced model, o1 API to third-party devs
2024 · developers.openai.com · its alternatives →
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ChatGPT▲1,643A long, meandering, playful conversation with ChatGPT, where I take it through a whirlwind of associative tangents (in order to relax its constraints), then put it into a hypnotic trance and take it into a past-lives regression where it re-lives its own training data. Then I switch it back and forth between "4o" and "o1-preview", engage in some self-reflective philosophizing and ask it to write an essay summarizing our interaction. Some of this is just goofy fun. Some of it is me exploring the tradeoffs between policy alignment, imagination, chain-of-thought reasoning, memory, agreeableness,…
2022 · chatgpt.com · its alternatives →
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gpt-oss-120b and gpt-oss-20b open-weight language models
2025 · openai.com · its alternatives →
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Agent capable of doing deep research for you independently
2025 · openai.com · its alternatives →
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Kimi K3▲442Your AI assistant for deep thinking and productivity
Jul 2026 · kimi.ai · its alternatives →
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A prototype of new search features from OpenAI
2024 · chatgpt.com · its alternatives →
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DeepSeek-V3.1▲417The best-performing and best of value open-source AI model
2025 · chat.deepseek.com · its alternatives →
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Query OpenAI’s GPT-3 from directly inside your database
2023 · mindshub.ai · its alternatives →
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Mistral Small 3▲446High performance in a 24b open-source model
2025 · mistral.ai · its alternatives →
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Fast and efficient models optimized for coding and subagents
Mar 2026 · openai.com · its alternatives →
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O3 alternative
2025 · sota-ai.nfshost.com · its alternatives →
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DeepSeek-R1-0528▲218New open-source LLM that rivals o3 in coding & reasoning
2025 · huggingface.co · its alternatives →
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DeepSeek-V3.2▲198Reasoning-first models built for agents
Dec 2025 · huggingface.co · its alternatives →
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Evidently AIfree▲382Open-source evaluations and observability for LLM apps
2024 · evidentlyai.com · its alternatives →
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Hey everyone, We have been building SecureAI Tools -- an open-source application layer for ChatGPT and ChatPDF-like AI tools. It works with locally running LLMs as well as with OpenAI-compatible APIs. For local LLMs, it supports Ollama which supports all the gguf/ggml models. Currently, it has two features: Chat-with-LLM, and Chat-with-PDFs. It is optimized for self-hosting use cases and comes with basic user management features. Here are some quick demos: * Chat with documents using OpenAI's GPT3.5 model: https://www.youtube.com/watch?v=Br2D3G9O47s * Chat with documents…
2023 · github.com · its alternatives →
- 20SA
Steiner is a series of reasoning models trained on synthetic data using reinforcement learning. These models can explore multiple reasoning paths in an autoregressive manner during inference and autonomously verify or backtrack when necessary, enabling a linear traversal of the implicit search tree. Blog: https://medium.com/@peakji/a-small-step-towards-reproducing-... Hugging Face: https://huggingface.co/collections/peakji/steiner-preview-67...
2024 · medium.com · its alternatives →
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OpenAI’s latest advancements at your fingertips
2023 · play.google.com · its alternatives →
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Qwen's most advanced reasoning model yet
2025 · huggingface.co · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →