Inference
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Particle AI

Particle-1

Particle-1 is a reasoning model from Particle AI. It has 4 scored results in 2 categories. It has no index.

  • Closed weights
  • Reasoning
  • Input: text · image
  • Released 2026-10
UnrankedEnough results for an index.
IndexAll categories, out of 100.UnrankedMedian 51.0
CoverageIndex weight that has results.35%
SpeedOutput tokens per second.120/sMedian 67/s
First tokenSeconds to the first output token.0.8 sMedian 1.3 s
Input / 1MUS dollars per 1M input tokens.$0.05Median $0.60
Output / 1MUS dollars per 1M output tokens.$0.50Median $2.55
ContextMaximum tokens in one request.1.05MMedian 262K
EloLMArena rating and rank.—Median 1422

Details

From OpenRouter
API IDThe model ID on OpenRouter.
particle-ai/particle-1
Max outputMaximum output tokens per request.
131K
Knowledge cutoffLast date of training data.
—
ToolsTool calls on OpenRouter.
Yes
JSON outputOutput follows a given JSON schema.
Yes
Cache read / 1MUS dollars per 1M cached tokens.
<$0.01
WeightsLink to the published weights.
—
RetiresDate OpenRouter removes the model.
—

Capabilities

Index per category, out of 100.
Out of 100
AgenticMulti-step tasks with tools.2 counted70.9—
CodingCode writing and repair.None counted——
ReasoningLogic problems and puzzles.None counted——
MultimodalTasks with images and text.None counted——
KnowledgeFacts and expert knowledge.2 counted47.2—
MultilingualTasks in many languages.None counted——
InstructionTasks with strict prompt rules.None counted——
MathMath problems.None counted——

Results

4 counted
BenchmarkThe benchmark name.ResultThe score from the source.PlacePlace among results on this benchmark.
DeepSWEAgentic72.6%16 / 59
GPQA Diamond · BenchLMKnowledge90.4%27 / 84
Massive Multitask Language UnderstandingKnowledge86.1%15 / 34
Terminal-Bench 2.1 · BenchLMAgentic79.9%38 / 86

Sources

BenchLMCC BY-NC 4.0OpenRouterTerms restrict reuse

History

5 releases
Output / 1M$0.50 → $0.50
29 Oct 202612 Nov 2026

Questions

How much does Particle-1 cost?
$0.05 per 1M input tokens, $0.50 per 1M output tokens.
How fast is Particle-1?
120 output tokens per second, 0.8 s to the first token.
What is the context window of Particle-1?
1.05M tokens.
Is Particle-1 open source?
No. Its weights are not published.
When was Particle-1 released?
October 2026.