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Gemini 4 Carbon vs GPT-6 Luna

Gemini 4 Carbon leads the LLM Stats Score 58.8 to 43.1.

Google · OpenAI · Updated for 2026

Which is better?

Gemini 4 Carbon leads the overall LLM Stats Score 58.8 to 43.1, ranking #2 overall.

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

Choose Gemini 4 Carbon

  • overall performance matters — it scores 58.8 and ranks #2 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you want the most recent training data — it shipped Oct 2026

Choose GPT-6 Luna

  • you want predictable pricing at $0.10/M input and $0.50/M output

At a glance

The differences that matter most.

Gemini 4 Carbon
Google
GPT-6 Luna
OpenAI
Core performance indexes
LLM Stats Score
58.8
#2
43.1
#60
Reasoning
54.4
#5
39.2
#79
Coding
48.3
#3
29.7
#72
Agents
45.8
#1
30.4
#50
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
$0.10 / M
Output price
— / M
$0.50 / M
Context window
—
1,050,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Gemini 4 Carbon
GPT-6 Luna
Tool use
35.4#3
22.5#60
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

16 reported for Gemini 4 Carbon · 5 for GPT-6 Luna

No common benchmarks found

Gemini 4 Carbon and GPT-6 Lunadon'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-6 Luna specifies input context (1,050,000 tokens). Only GPT-6 Luna specifies output context (128,000 tokens).

Google
Gemini 4 Carbon
Input- tokens
Output- tokens
OpenAI
GPT-6 Luna
Input1,050,000 tokens
Output128,000 tokens
Sat Nov 07 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Gemini 4 Carbon and GPT-6 Luna support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Gemini 4 Carbon

Text
Images
Audio
Video

GPT-6 Luna

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 Carbon

Proprietary

Closed source

GPT-6 Luna

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 4 Carbon was released on 2026-10-28, while GPT-6 Luna was released on 2026-09-22.

Gemini 4 Carbon is 1 month newer than GPT-6 Luna.

Gemini 4 Carbon

Oct 28, 2026

1 weeks ago

1mo newer
GPT-6 Luna

Sep 22, 2026

1 months ago

Knowledge Cutoff

When training data ends

GPT-6 Luna has a documented knowledge cutoff of 2026-05-18, while Gemini 4 Carbon's cutoff date is not specified.

We can confirm GPT-6 Luna's training data extends to 2026-05-18, but cannot make a direct comparison without Gemini 4 Carbon's cutoff date.

Gemini 4 Carbon

—

GPT-6 Luna

May 2026

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Gemini 4 Carbon and GPT-6 Luna side-by-side, then vote on the output you prefer.

Gemini 4 Carbon
✓ Preferred
GPT-6 Luna
Open in Playground

FAQ

Common questions about Gemini 4 Carbon vs GPT-6 Luna.

Which is better, Gemini 4 Carbon or GPT-6 Luna?

Gemini 4 Carbon leads the LLM Stats Score 58.8 to 43.1. Gemini 4 Carbon is made by Google and GPT-6 Luna 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 Carbon compare to GPT-6 Luna in benchmarks?

Gemini 4 Carbon scores Gray Swan IPI Benchmark: 100.0%, Vending-Bench 2: 100.0%, Graphwalks BFS >128k: 96.2%, WebDev Arena: 88.4%, SEC-bench Pro: 88.2%. GPT-6 Luna scores DeepSWE 1.1: 66.6%, OSWorld 2.0: 52.7%, Agents' Last Exam: 50.9%, FrontierCode 1.1: 42.4%, AutomationBench v1.0.6: 20.7%.

What are the context window sizes for Gemini 4 Carbon and GPT-6 Luna?

Gemini 4 Carbon supports an unknown number of tokens and GPT-6 Luna 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 4 Carbon and GPT-6 Luna?

Key differences include LLM Stats Score (58.8 vs 43.1). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 4 Carbon and GPT-6 Luna?

Gemini 4 Carbon is developed by Google and GPT-6 Luna is developed by OpenAI.

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