AI · alternatives · 2026
24 alternatives to OpenAI o1
AI that can do general-purpose complex reasoning
OpenAI o1 is a large language model designed to tackle complex reasoning tasks across general purposes. Trained using reinforcement learning, it generates an internal chain of thought before providing answers, allowing… 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. OpenAI o1 launched in 2024; newer entries below may have overtaken it.
- 1
OpenAI o1 API ▲458OpenAI's most advanced model, o1 API to third-party devs
2024 · developers.openai.com · its alternatives →
- 2
OpenAI o3-mini▲510Pushing the frontier of cost-effective reasoning
2025 · openai.com · its alternatives →
- 3
Advanced Visual Reasoning & Agentic Tool Use
2025 · openai.com · its alternatives →
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GPT-4▲1,160More accurate, less cringe, smoother & useful daily chats!
2023 · openai.com · its alternatives →
- 6
gpt-oss-120b and gpt-oss-20b open-weight language models
2025 · openai.com · its alternatives →
- 7
Open AI o3 API▲141Advanced reasoning models with safety-first innovation.
2024 · openai.com · its alternatives →
- 8
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 →
- 9
DeepSeek-V3.1▲417The best-performing and best of value open-source AI model
2025 · chat.deepseek.com · its alternatives →
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- 13
Tighter instruction adherence in speech agents
Feb 2026 · developers.openai.com · its alternatives →
- 14
General Compute▲315AI models that run on an inference cloud optimized for speed
May 2026 · generalcompute.com · its alternatives →
- 15
DeepSeek-V3.2▲198Reasoning-first models built for agents
Dec 2025 · huggingface.co · its alternatives →
- 16
OpenHuman▲549An open source AI harness built with the human in mind
May 2026 · tinyhumans.ai · its alternatives →
- 17SA
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 →
- 18
Kimi K3▲442Your AI assistant for deep thinking and productivity
Jul 2026 · kimi.ai · its alternatives →
- 19
Agno▲326Build, run, and manage agent platforms. Contribute to agno-agi/agno development by creating an account on GitHub.
2025 · github.com · its alternatives →
- 20
Qwen3.5▲288The 397B native multimodal agent with 17B active params
Feb 2026 · qwen.ai · its alternatives →
- 21
Brain-inspired, multi-level reasoning & planning AI model
2025 · github.com · its alternatives →
- 22
Evidently AIfree▲382Open-source evaluations and observability for LLM apps
2024 · evidentlyai.com · its alternatives →
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Kimi K2▲345The 1T parameter open model for agentic intelligence
2025 · moonshotai.github.io · 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 →