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Gemini 3.8 Flash Cyber vs GPT-5.1 Instant

Gemini 3.8 Flash Cyber leads the LLM Stats Score 42.3 to 36.6.

Google · OpenAI · Updated for 2026

Which is better?

Gemini 3.8 Flash Cyber leads the overall LLM Stats Score 42.3 to 36.6, ranking #46 overall.

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

Choose Gemini 3.8 Flash Cyber

  • overall performance matters — it scores 42.3 and ranks #46 on LLM Stats
  • you want the most recent training data — it shipped Sep 2026

Choose GPT-5.1 Instant

  • you want predictable pricing at $1.25/M input and $10.00/M output

At a glance

The differences that matter most.

Gemini 3.8 Flash Cyber
Google
GPT-5.1 Instant
OpenAI
Core performance indexes
LLM Stats Score
42.3
#46
36.6
#73
Coding
35.7
#25
21.4
#86
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
$1.25 / M
Output price
— / M
$10.00 / M
Context window
—
400,000

Individual benchmarks

4 reported for Gemini 3.8 Flash Cyber · 9 for GPT-5.1 Instant

No common benchmarks found

Gemini 3.8 Flash Cyber and GPT-5.1 Instantdon'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-5.1 Instant specifies input context (400,000 tokens). Only GPT-5.1 Instant specifies output context (128,000 tokens).

Google
Gemini 3.8 Flash Cyber
Input- tokens
Output- tokens
OpenAI
GPT-5.1 Instant
Input400,000 tokens
Output128,000 tokens
Wed Sep 09 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

GPT-5.1 Instant supports multimodal inputs, whereas Gemini 3.8 Flash Cyber does not.

GPT-5.1 Instant 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-5.1 Instant

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-5.1 Instant

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.8 Flash Cyber was released on 2026-09-02, while GPT-5.1 Instant was released on 2025-11-12.

Gemini 3.8 Flash Cyber is 10 months newer than GPT-5.1 Instant.

Gemini 3.8 Flash Cyber

Sep 2, 2026

6 days ago

9mo newer
GPT-5.1 Instant

Nov 12, 2025

10 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 GPT-5.1 Instant side-by-side, then vote on the output you prefer.

Gemini 3.8 Flash Cyber
✓ Preferred
GPT-5.1 Instant
Open in Playground

FAQ

Common questions about Gemini 3.8 Flash Cyber vs GPT-5.1 Instant.

Which is better, Gemini 3.8 Flash Cyber or GPT-5.1 Instant?

Gemini 3.8 Flash Cyber leads the LLM Stats Score 42.3 to 36.6. Gemini 3.8 Flash Cyber is made by Google and GPT-5.1 Instant 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-5.1 Instant 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-5.1 Instant scores Tau2 Telecom: 95.6%, AIME 2025: 94.0%, BrowseComp Long Context 128k: 90.0%, GPQA: 88.1%, MMMU: 85.4%.

What are the context window sizes for Gemini 3.8 Flash Cyber and GPT-5.1 Instant?

Gemini 3.8 Flash Cyber supports an unknown number of tokens and GPT-5.1 Instant supports 400K 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-5.1 Instant?

Key differences include LLM Stats Score (42.3 vs 36.6), multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.8 Flash Cyber and GPT-5.1 Instant?

Gemini 3.8 Flash Cyber is developed by Google and GPT-5.1 Instant is developed by OpenAI.

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