# Viv Fast

> Viv Fast is a proprietary language model from Vivgrid, released on 21 Sept 2026. It accepts text and images and generates text, with a 1M-token context window and up to 256K output tokens per response.

Source page: https://www.aimodel.directory/models/viv-fast
Last verified: 4 Oct 2026

## Specifications

- **Developer:** Vivgrid
- **Release date:** 21 Sept 2026 (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vivgrid/models/viv-fast.toml)
- **Status:** Generally available (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vivgrid/models/viv-fast.toml)
- **Weights:** Proprietary (API only) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vivgrid/models/viv-fast.toml)
- **Context window:** 1M (1,000,000 tokens) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vivgrid/models/viv-fast.toml)
- **Max output:** 256K tokens (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vivgrid/models/viv-fast.toml)
- **Knowledge cutoff:** Sept 2026 (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vivgrid/models/viv-fast.toml)
- **Input:** Text and images (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vivgrid/models/viv-fast.toml)
- **Output:** Text (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vivgrid/models/viv-fast.toml)
- **Reasoning mode:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vivgrid/models/viv-fast.toml)
- **Tool calling:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vivgrid/models/viv-fast.toml)
- **Structured output:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vivgrid/models/viv-fast.toml)

## API pricing (USD per 1M tokens)

| Provider | Input | Output | Cached input | Context |
|---|---|---|---|---|

## FAQ

### What is the context window of Viv Fast?

Viv Fast has a context window of 1,000,000 tokens (1M) and can generate up to 256,000 tokens in a single response, according to models.dev.

### Is Viv Fast open source?

No. Viv Fast is a proprietary model; Vivgrid has not released its weights.

### When was Viv Fast released?

Vivgrid released Viv Fast on 21 Sept 2026, according to models.dev.

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Data licensed CC BY 4.0. Cite as: AI Model Directory, "Viv Fast", https://www.aimodel.directory/models/viv-fast