# Flan T5 XL 3B API Pricing

As of October 10, 2026, Flan T5 XL 3B costs $0.60 per 1M input tokens and $0.60 per 1M output tokens on IBM watsonx.ai. It has an 8,192-token context window and returns up to 8,192 tokens per response.

- Page: https://models.litellm.ai/models/flan-t5-xl-3b
- Lab: Google
- LiteLLM model name: `watsonx/google/flan-t5-xl-3b`
- Context window: 8,192 tokens
- Max output: 8,192 tokens
- Added to LiteLLM: October 2025
- Prices updated: October 10, 2026

## Pricing by provider

Token prices in USD per 1M tokens.

| Provider | Model name | Input | Output | Cache read | Per image | Per second | Context |
|---|---|---|---|---|---|---|---|
| IBM watsonx.ai | `watsonx/google/flan-t5-xl-3b` | $0.60 | $0.60 | – | – | – | 8K |

## Cost examples

1,000 requests with 2,000 input and 500 output tokens each:

- IBM watsonx.ai: $1.50

## Features

Supported: none listed.
Not supported: Function calling, Parallel tool calls, Image input.

## Use it with LiteLLM

```python
from litellm import completion

response = completion(
    model="watsonx/google/flan-t5-xl-3b",
    messages=[{"role": "user", "content": "Hello!"}],
)
```

## FAQ

### How much does Flan T5 XL 3B cost?

Flan T5 XL 3B costs $0.60 per 1M input tokens and $0.60 per 1M output tokens on IBM watsonx.ai.

### What is the context window of Flan T5 XL 3B?

Flan T5 XL 3B has an 8,192-token context window and returns up to 8,192 tokens per response.

### Which providers offer Flan T5 XL 3B?

Flan T5 XL 3B is available from IBM watsonx.ai through LiteLLM, using the model name watsonx/google/flan-t5-xl-3b.

### How do I call Flan T5 XL 3B with an OpenAI-compatible API?

Use the LiteLLM Python SDK with model="watsonx/google/flan-t5-xl-3b", or add the model to the LiteLLM proxy's config.yaml and send requests to /v1/chat/completions from any OpenAI client. LiteLLM tracks the cost of every request at the prices on this page.

### What features does Flan T5 XL 3B support?

It does not support function calling, parallel tool calls and image input.

### When did LiteLLM add Flan T5 XL 3B?

Flan T5 XL 3B was added to LiteLLM's model price file in October 2025.

Source: LiteLLM model price file, https://github.com/BerriAI/litellm/blob/main/model_prices_and_context_window.json