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Gemini 3.8 Flash Cyber vs GPT-5.1 Codex Mini

Gemini 3.8 Flash Cyber leads the LLM Stats Score 40.3 to -2.8.

Google · OpenAI · Updated for 2026

Which is better?

Gemini 3.8 Flash Cyber leads the overall LLM Stats Score 40.3 to -2.8, ranking #55 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 40.3 and ranks #55 on LLM Stats
  • you want the most recent training data — it shipped Sep 2026

Choose GPT-5.1 Codex Mini

  • you want predictable pricing at $0.25/M input and $2.00/M output

At a glance

The differences that matter most.

Gemini 3.8 Flash Cyber
Google
GPT-5.1 Codex Mini
OpenAI
Core performance indexes
LLM Stats Score
40.3
#55
-2.8
#341
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
$0.25 / M
Output price
— / M
$2.00 / M
Context window
—
400,000

Individual benchmarks

4 reported for Gemini 3.8 Flash Cyber · 1 for GPT-5.1 Codex Mini

No common benchmarks found

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

Google
Gemini 3.8 Flash Cyber
Input- tokens
Output- tokens
OpenAI
GPT-5.1 Codex Mini
Input400,000 tokens
Output128,000 tokens
Mon Sep 21 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

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

GPT-5.1 Codex Mini 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 Codex Mini

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 Codex Mini

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 Codex Mini was released on 2025-11-12.

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

Gemini 3.8 Flash Cyber

Sep 2, 2026

2 weeks ago

9mo newer
GPT-5.1 Codex Mini

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 Codex Mini side-by-side, then vote on the output you prefer.

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

FAQ

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

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

Gemini 3.8 Flash Cyber leads the LLM Stats Score 40.3 to -2.8. Gemini 3.8 Flash Cyber is made by Google and GPT-5.1 Codex Mini 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 Codex Mini 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 Codex Mini scores AIME 2025: 42.1%.

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

Gemini 3.8 Flash Cyber supports an unknown number of tokens and GPT-5.1 Codex Mini 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 Codex Mini?

Key differences include LLM Stats Score (40.3 vs -2.8), 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 Codex Mini?

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

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