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Gemini 3.8 Flash Cyber vs Seed 2.1 Pro

Gemini 3.8 Flash Cyber and Seed 2.1 Pro are closely matched at 42.5 and 46.6 on the LLM Stats Score.

Google · ByteDance · Updated for 2026

Which is better?

Gemini 3.8 Flash Cyber and Seed 2.1 Pro are closely matched on the overall LLM Stats Score at 42.5 and 46.6.

In the 1 individual benchmarks reported for both models, Gemini 3.8 Flash Cyber wins 1; this is a narrower head-to-head signal than the composite indexes.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Gemini 3.8 Flash Cyber

  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results
  • you want the most recent training data — it shipped Sep 2026

Choose Seed 2.1 Pro

  • you are already invested in the ByteDance ecosystem

At a glance

The differences that matter most.

Gemini 3.8 Flash Cyber
Google
Seed 2.1 Pro
ByteDance
Core performance indexes
LLM Stats Score
42.5
#45
46.6
#24
Coding
35.6
#24
33.8
#30
Agents
31.5
#26
31.6
#25
Cost, coverage & limits
Benchmark wins
1 of 1
0 of 1
Input price
— / M
— / M
Output price
— / M
— / M
Context window
—
—

Individual benchmarks

4 reported for Gemini 3.8 Flash Cyber · 94 for Seed 2.1 Pro

1 shared

Gemini 3.8 Flash Cyber outperforms in 1 benchmarks (CyberGym), while Seed 2.1 Pro is better at 0 benchmarks.

Gemini 3.8 Flash Cyber significantly outperforms across most benchmarks.

Thu Sep 03 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Input capabilities

Documented input modalities across available providers

Seed 2.1 Pro supports multimodal inputs, whereas Gemini 3.8 Flash Cyber does not.

Seed 2.1 Pro can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemini 3.8 Flash Cyber

Text
Images
Audio
Video

Seed 2.1 Pro

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Gemini 3.8 Flash Cyber

Proprietary

Closed source

Seed 2.1 Pro

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.8 Flash Cyber was released on 2026-09-02, while Seed 2.1 Pro was released on 2026-06-24.

Gemini 3.8 Flash Cyber is 2 months newer than Seed 2.1 Pro.

Gemini 3.8 Flash Cyber

Sep 2, 2026

0 days ago

2mo newer
Seed 2.1 Pro

Jun 24, 2026

2 months ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Gemini 3.8 Flash Cyber and Seed 2.1 Pro side-by-side, then vote on the output you prefer.

Gemini 3.8 Flash Cyber
✓ Preferred
Seed 2.1 Pro
Open in Playground

FAQ

Common questions about Gemini 3.8 Flash Cyber vs Seed 2.1 Pro.

Which is better, Gemini 3.8 Flash Cyber or Seed 2.1 Pro?

Gemini 3.8 Flash Cyber and Seed 2.1 Pro are closely matched on the LLM Stats Score at 42.5 and 46.6. Gemini 3.8 Flash Cyber is made by Google and Seed 2.1 Pro is made by ByteDance. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Gemini 3.8 Flash Cyber compare to Seed 2.1 Pro in benchmarks?

Gemini 3.8 Flash Cyber scores Gray Swan IPI Benchmark: 94.0%, CyberGym: 86.2%, Google Real-world Vulnerability Discovery: 71.0%, CWE-Bench: 47.2%. Seed 2.1 Pro scores CharXiv-D: 95.5%, MathVision: 94.5%, MathVista: 90.7%, MathVerse: 89.7%, Video-MME: 89.2%.

What are the main differences between Gemini 3.8 Flash Cyber and Seed 2.1 Pro?

Key differences include LLM Stats Score (42.5 vs 46.6), multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.8 Flash Cyber and Seed 2.1 Pro?

Gemini 3.8 Flash Cyber is developed by Google and Seed 2.1 Pro is developed by ByteDance.

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