# Particle-1

> Particle-1 is a token-efficient agentic coding model from Particle AI, post-trained on DeepSeek V4.1 Flash. It targets software engineering work such as terminal workflows and codebase changes, with a 1M-token context window, image input, tool calling and reasoning.

**ID**: `particle-ai/particle-1`  
**Creator**: particle-ai  
**Category**: text  
**Context**: 1M tokens  
**Pricing**: $0.25 / $1.00 per 1M · billed by your provider (BYOK)  
**Released**: 2026-10-28  
**Web page**: https://anyrouter.dev/model/particle-ai/particle-1

**Input modalities**: text, image  
**Output modalities**: text  

**Capabilities**: chat, streaming, function-calling, thinking, reasoning

**Supported parameters**: max_tokens, temperature, top_p, top_k, min_p, stop, seed, frequency_penalty, presence_penalty, repetition_penalty, logprobs, top_logprobs, tools, tool_choice, response_format, structured_outputs, reasoning, reasoning_effort, include_reasoning

## Usage

**Endpoint**: `POST https://anyrouter.dev/api/v1/chat/completions`

```bash
curl https://anyrouter.dev/api/v1/chat/completions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "particle-ai/particle-1",
  "messages": [
    {
      "role": "user",
      "content": "Say hi in 3 words."
    }
  ]
}'
```

## Providers

| Provider | Input | Output |
| --- | --- | --- |
| openrouter-byok | $0.25/M (list) | $1.00/M (list) |

BYOK routes are billed by your own provider key — AnyRouter charges $0. Rates marked (list) are the provider's published list price.

## Source

- Upstream docs: https://openrouter.ai/particle-ai/particle-1