# Whisper

> Whisper is a proprietary language model from OpenAI, released on 1 Mar 2023. It accepts audio and generates text, with a 448K-token context window and up to 4K output tokens per response.

Source page: https://www.aimodel.directory/models/whisper-1
Last verified: 21 Oct 2026

## Specifications

- **Developer:** OpenAI
- **Release date:** 1 Mar 2023 (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vercel/models/openai/whisper-1.toml)
- **Status:** Generally available (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vercel/models/openai/whisper-1.toml)
- **Weights:** Proprietary (API only) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vercel/models/openai/whisper-1.toml)
- **Context window:** 448K (448,000 tokens) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vercel/models/openai/whisper-1.toml)
- **Max output:** 4K tokens (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vercel/models/openai/whisper-1.toml)
- **Input:** Audio (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vercel/models/openai/whisper-1.toml)
- **Output:** Text (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vercel/models/openai/whisper-1.toml)
- **Reasoning mode:** No (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vercel/models/openai/whisper-1.toml)
- **Tool calling:** No (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/vercel/models/openai/whisper-1.toml)
- **Structured output:** No (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/merge-gateway/models/openai/whisper-1.toml)

## API pricing (USD per 1M tokens)

| Provider | Input | Output | Cached input | Context |
|---|---|---|---|---|
| Vercel AI Gateway | – | – | – | – |

## FAQ

### What is the context window of Whisper?

Whisper has a context window of 448,000 tokens (448K) and can generate up to 4,096 tokens in a single response, according to models.dev.

### Is Whisper open source?

No. Whisper is a proprietary model; OpenAI has not released its weights. It is available through APIs including Vercel AI Gateway.

### When was Whisper released?

OpenAI released Whisper on 1 Mar 2023, according to models.dev.

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Data licensed CC BY 4.0. Cite as: AI Model Directory, "Whisper", https://www.aimodel.directory/models/whisper-1