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Gemini 3.8 Flash Cyber vs GPT-5.5 Pro

Gemini 3.8 Flash Cyber and GPT-5.5 Pro are closely matched at 42.3 and 44.9 on the LLM Stats Score.

Google · OpenAI · Updated for 2026

Which is better?

Gemini 3.8 Flash Cyber and GPT-5.5 Pro are closely matched on the overall LLM Stats Score at 42.3 and 44.9.

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

Choose Gemini 3.8 Flash Cyber

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

Choose GPT-5.5 Pro

  • you want predictable pricing at $30.00/M input and $180.00/M output

At a glance

The differences that matter most.

Gemini 3.8 Flash Cyber
Google
GPT-5.5 Pro
OpenAI
Core performance indexes
LLM Stats Score
42.3
#46
44.9
#34
Agents
31.5
#28
28.3
#39
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
$30.00 / M
Output price
— / M
$180.00 / M
Context window
—
1,050,000

Individual benchmarks

4 reported for Gemini 3.8 Flash Cyber · 5 for GPT-5.5 Pro

No common benchmarks found

Gemini 3.8 Flash Cyber and GPT-5.5 Prodon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

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

Google
Gemini 3.8 Flash Cyber
Input- tokens
Output- tokens
OpenAI
GPT-5.5 Pro
Input1,050,000 tokens
Output128,000 tokens
Thu Sep 10 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

GPT-5.5 Pro supports multimodal inputs, whereas Gemini 3.8 Flash Cyber does not.

GPT-5.5 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

GPT-5.5 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

GPT-5.5 Pro

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.8 Flash Cyber was released on 2026-09-02, while GPT-5.5 Pro was released on 2026-04-23.

Gemini 3.8 Flash Cyber is 4 months newer than GPT-5.5 Pro.

Gemini 3.8 Flash Cyber

Sep 2, 2026

1 weeks ago

4mo newer
GPT-5.5 Pro

Apr 23, 2026

4 months ago

Knowledge Cutoff

When training data ends

GPT-5.5 Pro has a documented knowledge cutoff of 2025-12-01, while Gemini 3.8 Flash Cyber's cutoff date is not specified.

We can confirm GPT-5.5 Pro's training data extends to 2025-12-01, but cannot make a direct comparison without Gemini 3.8 Flash Cyber's cutoff date.

Gemini 3.8 Flash Cyber

—

GPT-5.5 Pro

Dec 2025

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 GPT-5.5 Pro side-by-side, then vote on the output you prefer.

Gemini 3.8 Flash Cyber
✓ Preferred
GPT-5.5 Pro
Open in Playground

FAQ

Common questions about Gemini 3.8 Flash Cyber vs GPT-5.5 Pro.

Which is better, Gemini 3.8 Flash Cyber or GPT-5.5 Pro?

Gemini 3.8 Flash Cyber and GPT-5.5 Pro are closely matched on the LLM Stats Score at 42.3 and 44.9. Gemini 3.8 Flash Cyber is made by Google and GPT-5.5 Pro is made by OpenAI. 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 GPT-5.5 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%. GPT-5.5 Pro scores BrowseComp: 90.1%, GDPval-MM: 82.3%, Humanity's Last Exam: 57.2%, FrontierMath: 39.6%, GeneBench: 33.2%.

What are the context window sizes for Gemini 3.8 Flash Cyber and GPT-5.5 Pro?

Gemini 3.8 Flash Cyber supports an unknown number of tokens and GPT-5.5 Pro 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 3.8 Flash Cyber and GPT-5.5 Pro?

Key differences include LLM Stats Score (42.3 vs 44.9), multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.8 Flash Cyber and GPT-5.5 Pro?

Gemini 3.8 Flash Cyber is developed by Google and GPT-5.5 Pro is developed by OpenAI.

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