# Particle-1

> Particle-1 is a language model from Particle AI, released on 28 Oct 2026. It accepts text and images and generates text, with a 1M-token context window and up to 131K output tokens per response. As of 2 Nov 2026, the lowest listed API price is $0.05 per million input tokens and $0.50 per million output tokens (OpenRouter), across 1 provider we track.

Source page: https://www.aimodel.directory/models/particle-1
Last verified: 2 Nov 2026

## Specifications

- **Developer:** Particle AI
- **Release date:** 28 Oct 2026 (source: OpenRouter, https://openrouter.ai/particle-ai/particle-1)
- **Status:** Generally available
- **Context window:** 1M (1,048,576 tokens) (source: OpenRouter, https://openrouter.ai/particle-ai/particle-1)
- **Max output:** 131K tokens (source: OpenRouter, https://openrouter.ai/particle-ai/particle-1)
- **Input:** Text and images (source: OpenRouter, https://openrouter.ai/particle-ai/particle-1)
- **Output:** Text (source: OpenRouter, https://openrouter.ai/particle-ai/particle-1)
- **Reasoning mode:** Yes (source: OpenRouter, https://openrouter.ai/particle-ai/particle-1)
- **Tool calling:** Yes (source: OpenRouter, https://openrouter.ai/particle-ai/particle-1)
- **Structured output:** Yes (source: OpenRouter, https://openrouter.ai/particle-ai/particle-1)

## API pricing (USD per 1M tokens)

| Provider | Input | Output | Cached input | Context |
|---|---|---|---|---|
| OpenRouter | $0.05 | $0.50 | $0.003 | 1M |

## FAQ

### What is the context window of Particle-1?

Particle-1 has a context window of 1,048,576 tokens (1M) and can generate up to 131,072 tokens in a single response, according to OpenRouter.

### How much does the Particle-1 API cost?

Particle-1 is listed from $0.05 per million input tokens and $0.50 per million output tokens (OpenRouter). Prices last verified 2 Nov 2026.

### When was Particle-1 released?

Particle AI released Particle-1 on 28 Oct 2026, according to OpenRouter.

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