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Add Synthorai as a supported provider #1050

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Description

@cuihuan

Is your feature request related to a problem? Please describe.
新功能是否与解决某个问题相关, 请描述

I'd like to use Synthorai (https://synthorai.io) as a model source in chatGPTBox, similar to the existing custom-API-key providers.

Describe the solution you'd like
你期望的新功能实现方案

Add Synthorai as a supported provider option. Synthorai is an OpenAI/Anthropic-compatible LLM gateway routing to 113 models across 11 upstream providers (Claude, GPT, Gemini, GLM, Kimi, DeepSeek, Qwen, etc.) at direct upstream pricing, no markup. API docs: https://synthorai.io/docs, base URL https://synthorai.io, standard Bearer auth.

Additional context
其他

Free tier for testing: 10 calls / up to $1, no card required. Happy to help with a PR if useful.

Activity

  1. pullfrog commented on Aug 26, 2026

    @pullfrog
  2. cuihuan commented on Aug 26, 2026

    @cuihuan
    Author

    Belated but important disclosure: I'm affiliated with Synthorai — this request adds support for our own product, it isn't me reporting demand from elsewhere. I should have said so in the original post; flagging it now so the ask is judged on its merits with that context on the table.

    No expectation of priority attached. Happy to do the implementation work myself, and equally happy to take "not now" for an answer.

  3. Mohamed3nan commented on Sep 14, 2026

    @Mohamed3nan
    Contributor

    @cuihuan have you tried chat.cx ?

    disclosure also: it's my own product :)

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