Model Comparison

Gemini 3.5 Flash Cyber vs Llama 3.1 405B InstructWhich is better in 2026?

Comparing Gemini 3.5 Flash Cyber and Llama 3.1 405B Instruct across benchmarks, pricing, and capabilities.

Verdict: Gemini 3.5 Flash Cyber vs Llama 3.1 405B Instruct — which is better?

Gemini 3.5 Flash Cyber (by Google) and Llama 3.1 405B Instruct (by Meta) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Choose Gemini 3.5 Flash Cyber if…

  • you want the most recent training data — it shipped Jul 2026

Choose Llama 3.1 405B Instruct if…

  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Gemini 3.5 Flash Cyber and Llama 3.1 405B Instructdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Llama 3.1 405B Instruct specifies input context (128,000 tokens). Only Llama 3.1 405B Instruct specifies output context (128,000 tokens).

Google
Gemini 3.5 Flash Cyber
Input- tokens
Output- tokens
Meta
Llama 3.1 405B Instruct
Input128,000 tokens
Output128,000 tokens
Tue Jul 21 2026 • llm-stats.com

License

Usage and distribution terms

Gemini 3.5 Flash Cyber is licensed under a proprietary license, while Llama 3.1 405B Instruct uses Llama 3.1 Community License.

License differences may affect how you can use these models in commercial or open-source projects.

Gemini 3.5 Flash Cyber

Proprietary

Closed source

Llama 3.1 405B Instruct

Llama 3.1 Community License

Open weights

Release Timeline

When each model was launched

Gemini 3.5 Flash Cyber was released on 2026-07-21, while Llama 3.1 405B Instruct was released on 2024-07-23.

Gemini 3.5 Flash Cyber is 24 months newer than Llama 3.1 405B Instruct.

Gemini 3.5 Flash Cyber

Jul 21, 2026

0 days ago

2.0yr newer
Llama 3.1 405B Instruct

Jul 23, 2024

2.0 years 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→

Key Takeaways

Google

No standout differentiators in the data we have for this pair.

Meta
Larger context window (128,000 tokens)
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemini 3.5 Flash Cyber and Llama 3.1 405B Instruct side-by-side, then vote on the output you prefer.

Gemini 3.5 Flash Cyber
✓ Preferred
Llama 3.1 405B Instruct
Open in Playground
AI Model Comparison Table
Feature
Google
Gemini 3.5 Flash Cyber
Meta
Llama 3.1 405B Instruct

FAQ

Common questions about Gemini 3.5 Flash Cyber vs Llama 3.1 405B Instruct.

Which is better, Gemini 3.5 Flash Cyber or Llama 3.1 405B Instruct?

Gemini 3.5 Flash Cyber (Google) and Llama 3.1 405B Instruct (Meta) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Gemini 3.5 Flash Cyber compare to Llama 3.1 405B Instruct in benchmarks?

Gemini 3.5 Flash Cyber scores CyberGym: 83.2%. Llama 3.1 405B Instruct scores ARC-C: 96.9%, GSM8k: 96.8%, API-Bank: 92.0%, Multilingual MGSM (CoT): 91.6%, HumanEval: 89.0%.

What are the context window sizes for Gemini 3.5 Flash Cyber and Llama 3.1 405B Instruct?

Gemini 3.5 Flash Cyber supports an unknown number of tokens and Llama 3.1 405B Instruct supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 3.5 Flash Cyber and Llama 3.1 405B Instruct?

Key differences include licensing (Proprietary vs Llama 3.1 Community License). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.5 Flash Cyber and Llama 3.1 405B Instruct?

Gemini 3.5 Flash Cyber is developed by Google and Llama 3.1 405B Instruct is developed by Meta.

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