Particle-1 (free)

Name: Particle AI: Particle-1 (free)
Brand: particle-ai
SKU: particle-ai/particle-1:free
Availability: InStock

particle-ai/particle-1:free

Particle-1 is a token-efficient agentic coding model from Particle AI, post-trained on DeepSeek V4.1 Flash.

Free in · Free out per 1M tokens1M contextOct 28, 2026

Free

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Also:Particle-1

Spec sheet

Published facts from the catalog, billed prices and what we measured here. Anything not measured says so.

Price, billed here

Input, per 1M tokens: $0
Output, per 1M tokens: $0
Margin: none

Context and formats

Context window: 1,048,576 tokens
Longest answer: 131,072 tokens
Reads: text and images
Makes: text
First listed: 2026-10-28

Measured here, last 7 days

First token, median: not measured
Answered without error: not measured

Tools and JSON

Tool calling: declaredthe provider's claim, not yet measured here
JSON output: declaredthe provider's claim, not yet measured here

Price and latency history as JSON: GET /api/planet/history?id=particle-ai/particle-1:free.

About

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...

In Particle AI's words.

Try it here

Cmd+Enter sends

The answer appears here.

Measured here

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Call it

Use one OpenAI compatible endpoint, this model's id and an am_live_ key from the dashboard. You can also try it in chat first with no key.

curl https://useantimatter.com/v1/chat/completions \
  -H "Authorization: Bearer $ANTIMATTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "particle-ai/particle-1:free", "messages": [{"role": "user", "content": "Hello"}]}'

Everything else is in the docs.

Embed this

A badge showing this model's live price per million tokens, as billed here, for a README or a site. It links back to this page.

<a href="https://useantimatter.com/planet/particle-ai/particle-1%3Afree"><img src="https://useantimatter.com/api/badge/price?id=particle-ai%2Fparticle-1%3Afree" alt="Particle-1 (free) price on Antimatter" height="28"></a>

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