Particle-1
Summary
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.
Particle-1 is a token-efficient agentic coding model from Particle AI, post-trained on DeepSeek V4.1 Flash. It is suited for software engineering work such as terminal workflows, codebase changes, and data...
Last verified 2 Nov 2026. Every figure on this page links to its source.
Specifications
| Developer | Particle AI |
|---|---|
| Release date | 28 Oct 2026 [OpenRouter] |
| Status | Generally available |
| Context window | 1M (1,048,576 tokens) [OpenRouter] |
| Max output | 131K tokens [OpenRouter] |
| Input | Text and images [OpenRouter] |
| Output | Text [OpenRouter] |
| Reasoning mode | Yes [OpenRouter] |
| Tool calling | Yes [OpenRouter] |
| Structured output | Yes [OpenRouter] |
Particle-1 API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| OpenRouter particle-ai/particle-1 | $0.05 | $0.50 | $0.003 | 1M | OpenRouter, 2 Nov 2026 |
Frequently asked questions
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.
Change history
- OpenRouter price changed: input $0.25 → $0.05, output $1 → $0.50 per 1M tokens
- OpenRouter price changed: input $0.25 → $0.25, output $1 → $1 per 1M tokens
- Added to the directory
- Now listed on OpenRouter