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Gemini 4 Argon vs GPT-5 Codex

Gemini 4 Argon leads the LLM Stats Score 55.4 to 26.6.

Google · OpenAI · Updated for 2026

Which is better?

Gemini 4 Argon leads the overall LLM Stats Score 55.4 to 26.6, ranking #4 overall.

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

Choose Gemini 4 Argon

  • overall performance matters — it scores 55.4 and ranks #4 on LLM Stats
  • your work emphasizes reasoning and 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 4 Argon
Google
GPT-5 Codex
OpenAI
Core performance indexes
LLM Stats Score
55.4
#4
26.6
#165
Reasoning
53.3
#6
26.4
#163
Coding
43.0
#7
19.1
#119
Cost, coverage & limits
Benchmark wins
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—
Input price
— / M
— / M
Output price
— / M
— / M
Context window
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Individual benchmarks

19 reported for Gemini 4 Argon · 1 for GPT-5 Codex

No common benchmarks found

Gemini 4 Argon 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

Input capabilities

Documented input modalities across available providers

Gemini 4 Argon supports multimodal inputs, whereas GPT-5 Codex does not.

Gemini 4 Argon can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemini 4 Argon

Text
Images
Audio
Video

GPT-5 Codex

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 4 Argon

Proprietary

Closed source

GPT-5 Codex

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 4 Argon was released on 2026-09-30, while GPT-5 Codex was released on 2025-09-15.

Gemini 4 Argon is 13 months newer than GPT-5 Codex.

Gemini 4 Argon

Sep 30, 2026

2 weeks ago

1.0yr newer
GPT-5 Codex

Sep 15, 2025

1.1 years ago

Knowledge Cutoff

When training data ends

GPT-5 Codex has a documented knowledge cutoff of 2024-09-30, while Gemini 4 Argon'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 4 Argon's cutoff date.

Gemini 4 Argon

—

GPT-5 Codex

Sep 2024

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Gemini 4 Argon and GPT-5 Codex side-by-side, then vote on the output you prefer.

Gemini 4 Argon
✓ Preferred
GPT-5 Codex
Open in Playground

FAQ

Common questions about Gemini 4 Argon vs GPT-5 Codex.

Which is better, Gemini 4 Argon or GPT-5 Codex?

Gemini 4 Argon leads the LLM Stats Score 55.4 to 26.6. Gemini 4 Argon 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 4 Argon compare to GPT-5 Codex in benchmarks?

Gemini 4 Argon scores Graphwalks BFS <128k: 99.7%, Vibe Code Bench: 91.9%, LVBench: 91.7%, LABBench2: 88.8%, Graphwalks BFS >128k: 84.2%. GPT-5 Codex scores SWE-Bench Verified: 74.5%.

What are the main differences between Gemini 4 Argon and GPT-5 Codex?

Key differences include LLM Stats Score (55.4 vs 26.6), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 4 Argon and GPT-5 Codex?

Gemini 4 Argon is developed by Google and GPT-5 Codex is developed by OpenAI.

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