Last updated 08-12-2026
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Chatworm
Chatworm is a browser chatbot that connects to major LLM APIs through your own keys. You pick a model from OpenAI, Anthropic, Google Gemini, DeepSeek, Alibaba Qwen, xAI Grok, Mistral AI, or StepFun, then chat directly without a ChatGPT Plus subscription. The interface also supports DALL-E 3 image generation, photo analysis with vision models, speech input via Whisper, and text-to-speech playback.
Unlike single-vendor chat apps, Chatworm is built for people who already pay per-token API bills and want one UI to hop between providers. You can switch models when an API is slow or down, tune randomness and max tokens, and set reasoning effort on supported models. The project is open source on GitHub (UnknownEnergy/chatgpt-api) and positions itself as cheaper than bundled subscriptions because you only pay what your API keys cost.
Developers, power users, and anyone comparing model quality side by side use Chatworm to test prompts across vendors from one tab. It runs as a web app with no account required beyond pasting API keys for the providers you want to use.
Chat with OpenAI, Anthropic, Gemini, DeepSeek, Qwen, Grok, Mistral AI, and StepFun models
Bring your own API keys for each provider with no ChatGPT Plus subscription
Generate images with DALL-E 3 and analyze photos with vision-capable models
Speech-to-text via Whisper and text-to-speech with 6 OpenAI voices
Switch models instantly when an API is slow or unavailable
Adjustable randomness, max tokens, and reasoning effort settings
Open source codebase on GitHub under UnknownEnergy/chatgpt-api
One interface for eight major LLM API providers with instant model switching.
No subscription fee; you pay only what your API keys cost per token.
Includes image generation, vision analysis, and voice conversation features.
Requires setting up and funding API keys for each provider you want to use.
No hosted managed service; you handle API billing and key security yourself.
Web-only interface with no dedicated mobile app listed on the site.
Is Chatworm free to use?
Yes, Chatworm is free to access as a web app. You supply your own API keys from OpenAI, Anthropic, Gemini, and other providers, so your only cost is the per-token usage those APIs charge.
Which AI models does Chatworm support?
Chatworm supports models from OpenAI, Anthropic, Google Gemini, DeepSeek, Alibaba Qwen, xAI Grok, Mistral AI, and StepFun. You select the active model from a dropdown and can switch between providers in the same session.
Does Chatworm require a ChatGPT Plus subscription?
No, Chatworm does not require ChatGPT Plus or any bundled subscription. Chatworm connects directly to provider APIs with keys you paste in, which Chatworm advertises as cheaper than subscription chat products.
Can Chatworm generate and analyze images?
Yes, Chatworm generates images with DALL-E 3 and analyzes photos you upload using vision-capable models. You can also have spoken conversations using Whisper speech-to-text and OpenAI text-to-speech voices.
Is Chatworm open source?
Yes, Chatworm is open source. The codebase is published as UnknownEnergy/chatgpt-api on GitHub, and the Chatworm site links directly to that repository for contributors and self-hosters.
How does Chatworm compare to ChatGPT?
Chatworm lets you switch between eight API providers from one interface, tune randomness and token limits, and pay only for API usage. ChatGPT locks you to OpenAI models behind a single subscription, while Chatworm is provider-agnostic.