Alternatives

Products that do what Exafunction NLP – Run models like GPT-J for 6x cheaper than OpenAI does

1. 1
   ChatGPT▲1,647

   Optimizing language models for dialogue

   2022 · chatgpt.com

2. 2
   GPT‑5.4▲475

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

   Mar 2026

3. 3
   GPT-4.5▲511

   The largest and best model for chat yet in GPT family

   2025

4. 4
   GPT-4▲1,161

   LLM that exhibits human-level performance

   2023 · openai.com

5. 5
   gpt-realtime-1.5 by OpenAI▲304

   Tighter instruction adherence in speech agents

   Feb 2026

6. 6
   GPT-J▲401

   Open-source cousin of GPT-3, everyone can use it

   2021

7. 7
   GPT-5.1 Instant and Thinking▲442

   Smarter, more conversational ChatGPT with new personalities

   Nov 2025

8. 8
   OpenAI GPT-4o Audio Models▲390

   Build Powerful Voice Agents

   2025

9. 9
   gptengineer.app▲746

   Chat with AI to build for the web

   2024 · lovable.dev

10. 10
    ChatGPT Pro▲412

    Scaled access to research-grade intelligence

    2024

11. 11
    GPT-4.1 in the API▲375

    Announcing GPT-4.1, GPT-4.1 mini, & GPT-4.1 nano in the API

    2025

12. 12OS
    Open source alternative to ChatGPT and ChatPDF-like AI tools▲234

    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

13. 13DA
    Dia, an open-weights TTS model for generating realistic dialogue▲652

    2025 · github.com

14. 14
    Bard▲485

    Google officially announces ChatGPT competitor called BARD

    2023

15. 15
    GPT‑5.4 mini and nano▲267

    Fast and efficient models optimized for coding and subagents

    Mar 2026

16. 16
    Dify.AI▲261

    Open-source platform for LLMOps, define your AI-native apps

    2023

17. 17
    NLP inside your database▲343

    Query OpenAI’s GPT-3 from directly inside your database

    2023

18. 18
    Grok 4.1▲367

    A new standard in conversational AI

    Nov 2025

19. 19
    Buffup.AI▲466

    The AI assistant that knows what you need by GPT-4o

    2024

20. 20
    RunInfra▲156

    Describe the AI model you need and get an optimized AI

    Jul 2026 · runinfra.ai

21. 21
    GPT-5.5 by OpenAI▲477

    OpenAI's smartest and most intuitive to use model yet

    Apr 2026 · openai.com

22. 22
    Lingoedit 2.0▲457

    Simplify translation and editing: your AI language companion

    2024

23. 23
    InlineGPT▲337

    Inline AI copilot, available right in all your apps

    2024

24. 24
    gpt-realtime▲266

    For reliable, production-ready voice agents

    2025

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