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Together AI documents a Chat Completions API that can be evaluated with Threetone’s custom-model connection probe. Choose a model available to your provider account and preserve the exact identifier with the candidate configuration.
The probe makes a real model request. A successful result does not enable custom-model publication or conversation execution, which remain unavailable.

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Candidate settings

Use Together AI’s current compatibility reference for the base URL and model naming. Model IDs use provider-specific names, commonly including a namespace. Do not substitute a display label or assume that similarly named models have the same capabilities.

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Test one configuration

1

Review model access

Confirm that the intended chat model is available, that the key can access it, and that a test request is authorized. The provider’s image, embedding, or speech endpoints are separate from this text probe.
2

Configure the candidate

In Custom LLM, enter the base URL without /chat/completions, the model ID, and the secret reference. Environment references use production during the probe. Follow the field workflow.
3

Inspect the response

Use Test connection and record a safe result. Threetone requests streaming Chat Completions with stream_options.include_usage: true and requires assistant text in the stream. Model-specific parameter or response differences can still cause the probe to fail.
Check authentication, exact model access, provider capacity, and stream compatibility separately. Keep credential values out of error reports. Do not treat a successful provider playground request as a substitute for this probe’s endpoint contract. For durable review, create a complete server draft and read it back. Publication remains rejected for custom selection; managed models use a separate configuration path.

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Frequently asked questions

No. This connection probe verifies a text response. Tool schemas, tool authorization, and runtime execution require their own supported tests.
Use the exact identifier supplied by Together AI for the model. A shorter display label may not resolve to a callable model.