Model Comparison

Gemini 3.5 Flash Cyber vs GPT-5.5Which is better in 2026?

Gemini 3.5 Flash Cyber significantly outperforms across most benchmarks.

Verdict: Gemini 3.5 Flash Cyber vs GPT-5.5 — which is better?

Gemini 3.5 Flash Cyber (by Google) and GPT-5.5 (by OpenAI) 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.

Gemini 3.5 Flash Cyber outperforms in 1 benchmarks (CyberGym), while GPT-5.5 is better at 0 benchmarks. Gemini 3.5 Flash Cyber significantly outperforms across most benchmarks.

Choose Gemini 3.5 Flash Cyber if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you want the most recent training data — it shipped Jul 2026

Choose GPT-5.5 if…

  • you want predictable pricing at $5.00/M input and $30.00/M output

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Gemini 3.5 Flash Cyber outperforms in 1 benchmarks (CyberGym), while GPT-5.5 is better at 0 benchmarks.

Gemini 3.5 Flash Cyber significantly outperforms across most benchmarks.

Tue Jul 21 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only GPT-5.5 specifies input context (1,050,000 tokens). Only GPT-5.5 specifies output context (128,000 tokens).

Google
Gemini 3.5 Flash Cyber
Input- tokens
Output- tokens
OpenAI
GPT-5.5
Input1,050,000 tokens
Output128,000 tokens
Tue Jul 21 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-5.5 supports multimodal inputs, whereas Gemini 3.5 Flash Cyber does not.

GPT-5.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemini 3.5 Flash Cyber

Text
Images
Audio
Video

GPT-5.5

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 3.5 Flash Cyber

Proprietary

Closed source

GPT-5.5

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.5 Flash Cyber was released on 2026-07-21, while GPT-5.5 was released on 2026-04-23.

Gemini 3.5 Flash Cyber is 3 months newer than GPT-5.5.

Gemini 3.5 Flash Cyber

Jul 21, 2026

0 days ago

2mo newer
GPT-5.5

Apr 23, 2026

2 months ago

Knowledge Cutoff

When training data ends

GPT-5.5 has a documented knowledge cutoff of 2025-12-01, while Gemini 3.5 Flash Cyber's cutoff date is not specified.

We can confirm GPT-5.5's training data extends to 2025-12-01, but cannot make a direct comparison without Gemini 3.5 Flash Cyber's cutoff date.

Gemini 3.5 Flash Cyber

—

GPT-5.5

Dec 2025

Outputs Comparison

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Key Takeaways

Google
Higher CyberGym score (83.2% vs 81.8%)
OpenAI
Larger context window (1,050,000 tokens)
Supports multimodal inputs

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemini 3.5 Flash Cyber and GPT-5.5 side-by-side, then vote on the output you prefer.

Gemini 3.5 Flash Cyber
✓ Preferred
GPT-5.5
Open in Playground
AI Model Comparison Table
Feature
Google
Gemini 3.5 Flash Cyber
OpenAI
GPT-5.5

FAQ

Common questions about Gemini 3.5 Flash Cyber vs GPT-5.5.

Which is better, Gemini 3.5 Flash Cyber or GPT-5.5?

Gemini 3.5 Flash Cyber significantly outperforms across most benchmarks. Gemini 3.5 Flash Cyber is made by Google and GPT-5.5 is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemini 3.5 Flash Cyber compare to GPT-5.5 in benchmarks?

Gemini 3.5 Flash Cyber scores CyberGym: 83.2%. GPT-5.5 scores Tau2 Telecom: 98.0%, ARC-AGI: 95.0%, GPQA: 93.6%, ARC-AGI v2: 85.0%, GDPval-MM: 84.9%.

What are the context window sizes for Gemini 3.5 Flash Cyber and GPT-5.5?

Gemini 3.5 Flash Cyber supports an unknown number of tokens and GPT-5.5 supports 1.1M 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 GPT-5.5?

Key differences include multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.5 Flash Cyber and GPT-5.5?

Gemini 3.5 Flash Cyber is developed by Google and GPT-5.5 is developed by OpenAI.

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