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Baseten Model APIs · Send a conversation to a model and get a completion back. W

Sends a list of chat messages to an open-source LLM via an OpenAI-compatible endpoint and returns the completion.

Categories: LLM inference

Use when

  • get a chat completion from an open-source LLM
  • swap an existing OpenAI client to a different model backend
  • run inference needing extended context up to 262k tokens

Not for

  • not for closed OpenAI or Anthropic models, open-source models only
  • not a managed agent, raw chat completions only

Inputs

POST JSON body: OpenAI-style chat completions {model, messages} (required); reasoning_effort, stream, tools (optional, model-dependent); exact schema not listed

Inputs undocumented: mpp.dev lists no input schema; see the provider's API reference

Endpoint

Method
POST
URL
https://mpp.orthogonal.com/baseten/v1/chat/completions

Payment

Protocol
MPP
Listed price
Not listed
Payment method
tempo
Network
tempo:mainnet
Asset
0x20c000000000000000000000b9537d11c60e8b50

Listed terms are catalog metadata. The caller supplies inputs and calls the tool outside Onelayer. If payment is required, the caller uses a compatible wallet to pay.

Source

Directory
MPP directory
Record
orth-baseten POST /v1/chat/completions
Retrieved
2026-09-30T20:37:07.382Z
Catalog file SHA-256
6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built
2026-09-30T22:31:58.034Z