Name: Vicuna FastChat T5 (3B) API
Brand: lmsys

How to use Vicuna FastChat T5 (3B) API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to .

OpenAI-compatible — swap the base URL and it works with your existing SDK.

Vicuna FastChat T5 (3B) API Pricing

Type	Price
Input
Output

Model	Input	Output	Context	Best for
Vicuna FastChat T5 (3B) This page
GPT-5.5	$6.5 / 1M tokens	$39 / 1M tokens	1M tokens	Reasoning + agents
Claude Sonnet 5	$2.6 / 1M tokens	$13 / 1M tokens	1M tokens	Balanced coding + agents
Kimi K3	$3.9 / 1M tokens	$19.5 / 1M tokens	1M tokens	Long-context, multimodal & agentic workflows
Gemini 3.5 Flash	$0.65 / 1M tokens	$3.9 / 1M tokens	1M tokens	Reasoning + agents

Yes, Vicuna FastChat T5 (3B) can stream responses as they are generated.

Yes, Vicuna FastChat T5 (3B) supports both function calling and structured outputs.

Vicuna FastChat T5 (3B) was built by lmsys.

Vicuna FastChat T5 (3B) has 3 billion parameters.

Vicuna FastChat T5 (3B) is accessed via the v1 endpoint.