Gemini 1.5 Flash vs Particle-1
Particle-1 leads the LLM Stats Score 31.9 to 5.5. Gemini 1.5 Flash is 1.7x cheaper per token.
Google · Particle AI · Updated for 2026
Which is better?
Particle-1 leads the overall LLM Stats Score 31.9 to 5.5, ranking #133 overall.
In the 2 individual benchmarks reported for both models, Particle-1 wins 2; this is a narrower head-to-head signal than the composite indexes.
On price, Gemini 1.5 Flash is roughly 1.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Gemini 1.5 Flash
- cost matters — it's about 1.7x cheaper per token
Choose Particle-1
- overall performance matters — it scores 31.9 and ranks #133 on LLM Stats
- your work emphasizes reasoning — it leads those capability indexes
- you value its reported benchmark strengths — it wins 2 of 2 exact shared results
- you want the most recent training data — it shipped Oct 2026
At a glance
The differences that matter most.
Individual benchmarks
22 reported for Gemini 1.5 Flash · 3 for Particle-1
Gemini 1.5 Flash outperforms in 0 benchmarks, while Particle-1 is better at 2 benchmarks (GPQA, MMLU).
Particle-1 significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Gemini 1.5 Flash ($0.15/1M tokens) is 1.7x cheaper than Particle-1 ($0.25/1M tokens).
For output processing, Gemini 1.5 Flash ($0.60/1M tokens) is 1.7x cheaper than Particle-1 ($1.00/1M tokens).
In conclusion, Particle-1 is more expensive than Gemini 1.5 Flash.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Both models have the same input context window of 1,048,576 tokens. Particle-1 can generate longer responses up to 131,072 tokens, while Gemini 1.5 Flash is limited to 8,192 tokens.
Input capabilities
Documented input modalities across available providers
Both Gemini 1.5 Flash and Particle-1 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Gemini 1.5 Flash
Particle-1
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Gemini 1.5 Flash was released on 2024-05-01, while Particle-1 was released on 2026-10-28.
Particle-1 is 30 months newer than Gemini 1.5 Flash.
May 1, 2024
2.5 years ago
Oct 28, 2026
-1 days ago
2.5yr newerKnowledge Cutoff
When training data ends
Gemini 1.5 Flash has a documented knowledge cutoff of 2023-11-01, while Particle-1's cutoff date is not specified.
We can confirm Gemini 1.5 Flash's training data extends to 2023-11-01, but cannot make a direct comparison without Particle-1's cutoff date.
Nov 2023
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Provider Availability
Gemini 1.5 Flash is available from Google. Particle-1 is available from Particle AI.
Gemini 1.5 Flash
Particle-1
Outputs Comparison
Judge for yourself.
Run your own prompts against Gemini 1.5 Flash and Particle-1 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Gemini 1.5 Flash vs Particle-1.