Particle-1 vs Seed 1.8
Particle-1 and Seed 1.8 are closely matched at 32.0 and 33.6 on the LLM Stats Score. Particle-1 is 1.6x cheaper per token.
Particle AI · ByteDance · Updated for 2026
Which is better?
Particle-1 and Seed 1.8 are closely matched on the overall LLM Stats Score at 32.0 and 33.6.
In the 1 individual benchmarks reported for both models, Seed 1.8 wins 1; this is a narrower head-to-head signal than the composite indexes.
On price, Particle-1 is roughly 1.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Particle-1 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Particle-1
- cost matters — it's about 1.6x cheaper per token
- you process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Oct 2026
Choose Seed 1.8
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
At a glance
The differences that matter most.
Individual benchmarks
3 reported for Particle-1 · 57 for Seed 1.8
Particle-1 outperforms in 0 benchmarks, while Seed 1.8 is better at 1 benchmark (MMLU).
Seed 1.8 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, Particle-1 ($0.25/1M tokens) costs the same as Seed 1.8 ($0.25/1M tokens).
For output processing, Particle-1 ($1.00/1M tokens) is 2.0x cheaper than Seed 1.8 ($2.00/1M tokens).
In conclusion, Seed 1.8 is more expensive than Particle-1.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Particle-1 accepts 1,048,576 input tokens compared to Seed 1.8's 256,000 tokens. Seed 1.8 can generate longer responses up to 256,000 tokens, while Particle-1 is limited to 131,072 tokens.
Input capabilities
Documented input modalities across available providers
Both Particle-1 and Seed 1.8 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Particle-1
Seed 1.8
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
Particle-1 was released on 2026-10-28, while Seed 1.8 was released on 2026-02-17.
Particle-1 is 8 months newer than Seed 1.8.
Oct 28, 2026
4 days ago
8mo newerFeb 17, 2026
8 months ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Particle-1 is available from Particle AI. Seed 1.8 is available from DeepInfra.
Particle-1
Seed 1.8
Outputs Comparison
Judge for yourself.
Run your own prompts against Particle-1 and Seed 1.8 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Particle-1 vs Seed 1.8.