The AI arena is free today

Open Superagent

Gemini 3.8 Flash Cyber vs GPT-5 Codex

Gemini 3.8 Flash Cyber leads the LLM Stats Score 42.4 to 26.8.

Google · OpenAI · Updated for 2026

Which is better?

Gemini 3.8 Flash Cyber leads the overall LLM Stats Score 42.4 to 26.8, 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 42.4 and ranks #46 on LLM Stats
  • your work emphasizes coding — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose GPT-5 Codex

  • you are already invested in the OpenAI ecosystem

At a glance

The differences that matter most.

Gemini 3.8 Flash Cyber
Google
GPT-5 Codex
OpenAI
Core performance indexes
LLM Stats Score
42.4
#46
26.8
#138
Coding
35.6
#25
19.4
#99
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
— / M
Output price
— / M
— / M
Context window
—
—

Individual benchmarks

4 reported for Gemini 3.8 Flash Cyber · 1 for GPT-5 Codex

No common benchmarks found

Gemini 3.8 Flash Cyber and GPT-5 Codexdon'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

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 Codex

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.8 Flash Cyber was released on 2026-09-02, while GPT-5 Codex was released on 2025-09-15.

Gemini 3.8 Flash Cyber is 12 months newer than GPT-5 Codex.

Gemini 3.8 Flash Cyber

Sep 2, 2026

2 days ago

11mo newer
GPT-5 Codex

Sep 15, 2025

11 months ago

Knowledge Cutoff

When training data ends

GPT-5 Codex has a documented knowledge cutoff of 2024-09-30, while Gemini 3.8 Flash Cyber's cutoff date is not specified.

We can confirm GPT-5 Codex's training data extends to 2024-09-30, but cannot make a direct comparison without Gemini 3.8 Flash Cyber's cutoff date.

Gemini 3.8 Flash Cyber

—

GPT-5 Codex

Sep 2024

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

Gemini 3.8 Flash Cyber
✓ Preferred
GPT-5 Codex
Open in Playground

FAQ

Common questions about Gemini 3.8 Flash Cyber vs GPT-5 Codex.

Which is better, Gemini 3.8 Flash Cyber or GPT-5 Codex?

Gemini 3.8 Flash Cyber leads the LLM Stats Score 42.4 to 26.8. Gemini 3.8 Flash Cyber is made by Google and GPT-5 Codex 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 Codex 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 Codex scores SWE-Bench Verified: 74.5%.

What are the main differences between Gemini 3.8 Flash Cyber and GPT-5 Codex?

Key differences include LLM Stats Score (42.4 vs 26.8). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.8 Flash Cyber and GPT-5 Codex?

Gemini 3.8 Flash Cyber is developed by Google and GPT-5 Codex is developed by OpenAI.

Related comparisons