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Baseten Chat Completions
inferencellmmodelsgpuaicompute
Baseten Chat Completions is a paid API for AI agents from Baseten Model APIs at mpp.orthogonal.com, paid per call via MPP, $0.003686/call, status unknown (last checked 2026-10-10).
Send a multi-turn conversation to an open-source LLM on Baseten and receive a generated text completion via an OpenAI-compatible interface
Price / call$0.003686
Success—
StatusUnknown
How this service works
Send a conversation to a model and get a completion back. Works exactly like the OpenAI chat completions endpoint. Pass messages and a model slug, get a response with the assistant's reply. Supports streaming for real-time token delivery, tool calling for function execution, structured outputs via response_format, and controllable reasoning depth on supported models.
Output
Returns an OpenAI-compatible chat completion response object containing the assistant's generated message, the model used, token usage statistics (prompt tokens, completion tokens, total tokens), and a finish reason indicating how the generation ended.
Example use cases
Example prompt
“Using the Baseten inference API, send this conversation to the model and get a completion back: system prompt is 'You are a helpful assistant', and the user message is 'Explain the difference between supervised and unsupervised learning in two sentences'.”
Technical details
Endpoint
POSThttps://mpp.orthogonal.com/baseten/v1/chat/completions?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need an OpenAI-compatible chat completions interface backed by open-source LLMs on a high-performance GPU inference platform. Ideal when you want a drop-in replacement for the OpenAI API, need to run models like Llama or Mistral without vendor lock-in, or want predictable per-call pricing on a curated inference backend.
Side effects
- Invalid or unsupported model ID returns a 404 or error response
- Malformed messages array causes a 400 bad request
- Exceeding context window length results in a truncation or error
- Authentication failure returns a 401 unauthorized
- Rate limiting or GPU capacity issues may return a 429 or 503
- Network timeout for very long completions
Tags
inferencellmmodelsgpuaicompute
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