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Endpoints

STACKIT

A hosted service with its own key and prices. This page lists the addresses it answers, the facts its documentation states, and the setup of each harness.

Addresses and facts

  • OpenAI Chat Completions: https://api.openai-compat.model-serving.eu01.onstackit.cloud/v1 models.dev, read
Authentication
Authorization: Bearer, with the key in STACKIT_API_KEY models.dev, read
Structured output
Unknown
Tool calling
5 of 8 listed models The share of this provider's models that models.dev records with tool calling. models.dev, read
Rate limits
Unknown
Prices
Unknown
Data retention
Unknown
Documentation
Read the page models.dev, read
Output limits Baltor recorded
Unknown

Harness setup

Replace Qwen/Qwen3-VL-235B-A22B-Instruct-FP8 with the model you want.

OpenCode

Put this in opencode.json in your project folder:

{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "stackit": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "STACKIT",
      "options": {
        "baseURL": "https://api.openai-compat.model-serving.eu01.onstackit.cloud/v1",
        "apiKey": "{env:STACKIT_API_KEY}"
      },
      "models": {
        "Qwen/Qwen3-VL-235B-A22B-Instruct-FP8": {
          "name": "Qwen/Qwen3-VL-235B-A22B-Instruct-FP8"
        }
      }
    }
  }
}
  • OpenCode reads any OpenAI-compatible address through the @ai-sdk/openai-compatible package, and an address that speaks the Responses API through @ai-sdk/openai.

From OpenCode documentation, read .

Pi

Put this in ~/.pi/agent/models.json:

{
  "providers": {
    "stackit": {
      "baseUrl": "https://api.openai-compat.model-serving.eu01.onstackit.cloud/v1",
      "api": "openai-completions",
      "apiKey": "$STACKIT_API_KEY",
      "models": [
        {
          "id": "Qwen/Qwen3-VL-235B-A22B-Instruct-FP8"
        }
      ]
    }
  }
}
  • The apiKey field can name an environment variable as $NAME.

From Pi documentation, read .

Codex

Codex speaks only the Responses API, and STACKIT documents no Responses address. A gateway that offers one can sit in between.

  • Codex speaks the Responses API only: responses is the one supported wire API of a custom provider. Ollama and LM Studio are built in and start with --oss.

From Codex documentation, read .

Claude Code

Claude Code sends Anthropic Messages requests, and STACKIT documents no such address. A gateway that translates to that API can sit in between.

  • Claude Code sends Anthropic Messages requests to ANTHROPIC_BASE_URL. Anthropic says it does not support routing Claude Code to models other than Claude through any gateway, so some features may not work with another model.

From Claude Code documentation, read .

Models it lists

Prices in US dollars per million tokens, input and output, as models.dev, read records them.

ModelInputOutputContextAs of
Qwen3-VL 235B Qwen/Qwen3-VL-235B-A22B-Instruct-FP81.76 USD2.05 USD218,000 older than 30 days
Qwen3-VL Embedding 8B Qwen/Qwen3-VL-Embedding-8B0.090 USD0.090 USD32,000 older than 30 days
Qwen3.6 27B Qwen/Qwen3.6-27B0.530 USD0.760 USD262,144 older than 30 days
Llama 3.3 70B cortecs/Llama-3.3-70B-Instruct-FP8-Dynamic0.530 USD0.760 USD128,000 older than 30 days
Gemma 3 27B google/gemma-3-27b-it0.530 USD0.760 USD37,000 older than 30 days
E5 Mistral 7B intfloat/e5-mistral-7b-instruct0.020 USD0.020 USD4,096 older than 30 days
GPT OSS 120B openai/gpt-oss-120b0.530 USD0.760 USD131,000 older than 30 days
GPT OSS 20B openai/gpt-oss-20b0.180 USD0.290 USD131,072 older than 30 days

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