Sekai: what it is, features, and how to use it with Geek Hub (2026)

Sekai is an AI roleplay platform built for Large Language Model (LLM) workflows. AI chat / worldbuilding experience. This Sekai review covers what Sekai is, key Sekai features, who should use Sekai, how to use Sekai step by step, and how to connect Sekai to Geek Hub when it supports an OpenAI-compatible endpoint. Official site: sekai.chat.

RoleplayUpdated 2026-08-11Official site

What is Sekai?

Sekai is AI chat / worldbuilding experience. In practice, Sekai works as an AI roleplay platform in the ecosystem of apps and agents that call LLMs over APIs.

People searching “what is Sekai” usually compare Sekai with other tools in the same cluster (AI roleplay platform). On public usage rankings (e.g. OpenRouter), Sekai shows up there — adoption context, not Geek Hub token volumes.

If you want to run Sekai with Claude, GPT, Gemini, or open-source models without locking to one vendor, the useful setup is: Sekai + an OpenAI-compatible gateway (Geek Hub).

Key features of Sekai

Sekai features change with each release — always confirm in the official Sekai docs (sekai.chat). As an AI roleplay platform, Sekai typically covers:

  • Sekai: Character and prompt creation
  • Sekai: Roleplay / creative writing sessions
  • Sekai: API model wiring when the product allows it

Who should use Sekai?

Sekai fits if you need an AI roleplay platform and care about model flexibility. Typical Sekai audiences:

  • Sekai for character and world creators for roleplay / storytelling
  • Sekai for users who want fine control of prompts and models
  • Sekai for communities wiring chat frontends to OpenAI-compatible APIs

How to use Sekai

How to get started with Sekai in most setups (adjust to Sekai docs):

  • Install or open Sekai from sekai.chat
  • Create an account or API access per Sekai’s flow
  • Configure the model / provider inside Sekai
  • If Sekai supports an OpenAI-compatible base URL, point Sekai at Geek Hub
  • Run a short workflow in Sekai and check quality + cost

Sekai pricing and plans

Sekai pricing depends on the product (free, freemium, subscription, or open-source). Always check the official Sekai page at sekai.chat before you decide.

Even when Sekai is free or freemium, model usage via API is usually billed separately. That’s why many teams connect Sekai to a gateway like Geek Hub: one key, many models, spend control.

How to use Sekai with Geek Hub (OpenAI-compatible API)

Many chat and roleplay UIs accept an OpenAI-compatible endpoint. Configure Sekai with Geek Hub’s base URL so Sekai isn’t locked to one provider.

Geek Hub unifies Claude, GPT, Gemini, and more behind Sekai.

  1. Generate a Geek Hub API key to use with Sekai
  2. In Sekai, open API / custom provider settings
  3. Sekai API base: https://api.geekhub.mx/v1
  4. Pick a model id in Sekai and save
  5. Send a short chat in Sekai and verify spend in Geek Hub
# Sekai → Geek Hub
OPENAI_BASE_URL=https://api.geekhub.mx/v1
OPENAI_API_KEY=gh_...
# example model id: anthropic/claude-sonnet-5
Get an API key

Sekai FAQ

What is Sekai?
Sekai is an AI roleplay platform. AI chat / worldbuilding experience. See sekai.chat for product details.
Does Sekai work with Geek Hub?
If Sekai supports an OpenAI-compatible provider, yes: configure Sekai with base URL https://api.geekhub.mx/v1 and your Geek Hub API key. If Sekai only speaks closed proprietary APIs, this Sekai guide is still a useful overview, but wiring may not apply.
How do I use Sekai with Claude, GPT, or Gemini?
In Sekai, pick a custom / OpenAI-compatible provider when available, point it at Geek Hub, and select the model id (e.g. anthropic/…, openai/…, google/…). That way Sekai switches models without switching apps.
Is Sekai free?
It depends on Sekai’s plan. Many tools are freemium or open-source at the core; model tokens are paid to the provider or gateway. Check pricing at sekai.chat.
Does Geek Hub republish OpenRouter token volumes for Sekai?
No. Public ranking volumes are not Geek Hub metrics. In Geek Hub you only see your account’s usage when calling models from Sekai or other apps.

Sekai vs similar tools