# Particle-1

Particle-1 is a model from Particle AI, released on 28 Oct 2026. The context window is 1,048,576 tokens. The maximum output is 131,072 tokens. Pricing is $0.05 per million input tokens and $0.50 per million output tokens.

- Developer: Particle AI
- Id: particle-1
- Released: 2026-10-28T00:00:00.000Z
- Status: Released
- Canonical: https://alexgetman.com/models/particle-ai/particle-1/

## Questions

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

The context window is 1,048,576 tokens. The maximum output is 131,072 tokens.

### How much does Particle-1 cost?

Pricing is $0.05 per million input tokens and $0.50 per million output tokens. Cached input is $0.003 per million.

### When was Particle-1 released?

On 28 Oct 2026.

## Evidence links

- [models.dev · catalogue](https://models.dev/#particle-1)
- [models.dev · catalogue](https://models.dev/#particle-1:free)
- [openrouter](https://openrouter.ai/particle-ai/particle-1)
- [openrouter](https://openrouter.ai/particle-ai/particle-1:free)
- [OpenRouter · usage](https://openrouter.ai/rankings)
- [review](https://particle.ai/blog/introducing-particle-1)

## Signals

- [Particle-1 (free) listed free on OpenRouter](https://alexgetman.com/signals/2026/11/12/particle-1-free-free-openrouter/)
- [Particle-1: API availability](https://alexgetman.com/signals/2026/10/28/particle-1-2/)