Alternatives

Products that do what ClosedOpenAI does

See how OpenAI's mission statement has changed over time

1. 1
   Codex by OpenAI▲955

   AI that writes code for you

   2021 · openai.com

2. 2
   OpenAI Universe▲329

   Platform for measuring and training AI agents

   2016

3. 3OA
   Open AI is not Open – A browser extension▲241

   2023 · github.com

4. 4
   OpenAI o1▲685

   AI that can do general-purpose complex reasoning

   2024 · openai.com

5. 5
   OpenAI o1 API ▲458

   OpenAI's most advanced model, o1 API to third-party devs

   2024

6. 6
   OpenAI o3-mini▲510

   Pushing the frontier of cost-effective reasoning

   2025

7. 7
   OpenHuman▲556

   An open source AI harness built with the human in mind

   May 2026 · tinyhumans.ai

8. 8
   GPT‑5.4▲475

   OpenAI's most efficient model: less tokens, more clarity

   Mar 2026

9. 9
   N71▲141

   Give all your AI agents one shared context

   Jul 2026 · n71.ai

10. 10
    OpenAI Gym▲147

    Open source interface to reinforcement learning tasks

    2016

11. 11
    Outlit▲376

    AI agents for your SaaS deals

    2024

12. 12
    AI Daily News▲112

    Latest AI news in a timeline

    2023

13. 13
    Evidently AI▲299

    Open-source monitoring for machine learning models

    2021

14. 14
    OpenAI o3 and o4-mini▲142

    Advanced Visual Reasoning & Agentic Tool Use

    2025

15. 15
    OpenAI Responses API and Agents SDK▲190

    New tools for building agents and tools

    2025

16. 16
    GPT-5▲127

    OpenAI’s most advanced model

    2025

17. 17
    Openbase▲216

    Manage your team of AI agents by voice, from anywhere

    Jul 2026 · openbase.cloud

18. 18
    OpenAI Frontier▲165

    Operate AI coworkers on a single enterprise platform

    Feb 2026

19. 19
    Donely Knowledge Layer▲102

    Queryable company knowledge base + Closed-loop AI employees

    May 2026 · donely.ai

20. 20
    OpenLIT 2.0▲141

    Open source dashboard for AI engineering & LLM data

    2025

21. 21
    OpenAI for Alfred▲114

    OpenAI text-completion workflow for Alfred

    2023

22. 22
    Dokko▲185

    Conversational AI Platform for Knowledge Sharing

    2024

23. 23OC
    Open Codex – OpenAI Codex CLI with open-source LLMs▲106

    Hey HN, I’ve built Open Codex, a fully local, open-source alternative to OpenAI’s Codex CLI. My initial plan was to fork their project and extend it. I even started doing that. But it turned out their code has several leaky abstractions, which made it hard to override core behavior cleanly. Shortly after, OpenAI introduced breaking changes. Maintaining my customizations on top became increasingly difficult. So I rewrote the whole thing from scratch using Python. My version is designed to support local LLMs. Right now, it only works with phi-4-mini (GGUF) via…

    2025 · github.com

24. 24
    Temporal + OpenAI Agents SDK▲130

    Build production-ready agents, fast.

    2025

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