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GPT-6 Luna vs Mistral Large 3 (675B Instruct 2512 Eagle)

GPT-6 Luna leads the LLM Stats Score 44.5 to 8.7.

OpenAI · Mistral AI · Updated for 2026

Which is better?

GPT-6 Luna leads the overall LLM Stats Score 44.5 to 8.7, ranking #40 overall.

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

Choose GPT-6 Luna

  • overall performance matters — it scores 44.5 and ranks #40 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 Mistral Large 3 (675B Instruct 2512 Eagle)

  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

GPT-6 Luna
OpenAI
Mistral Large 3 (675B Instruct 2512 Eagle)
Mistral AI
Core performance indexes
LLM Stats Score
44.5
#40
8.7
#282
Reasoning
40.0
#58
8.9
#275
Coding
31.4
#47
1.2
#240
Cost, coverage & limits
Benchmark wins
—
—
Input price
$0.10 / M
— / M
Output price
$0.50 / M
— / M
Context window
1,050,000
—

Individual benchmarks

5 reported for GPT-6 Luna · 5 for Mistral Large 3 (675B Instruct 2512 Eagle)

No common benchmarks found

GPT-6 Luna and Mistral Large 3 (675B Instruct 2512 Eagle)don'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).

OpenAI
GPT-6 Luna
Input1,050,000 tokens
Output128,000 tokens
Mistral AI
Mistral Large 3 (675B Instruct 2512 Eagle)
Input- tokens
Output- tokens
Wed Sep 23 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both GPT-6 Luna and Mistral Large 3 (675B Instruct 2512 Eagle) support multimodal inputs.

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

GPT-6 Luna

Text
Images
Audio
Video

Mistral Large 3 (675B Instruct 2512 Eagle)

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-6 Luna is licensed under a proprietary license, while Mistral Large 3 (675B Instruct 2512 Eagle) uses Apache 2.0.

License differences may affect how you can use these models in commercial or open-source projects.

GPT-6 Luna

Proprietary

Closed source

Mistral Large 3 (675B Instruct 2512 Eagle)

Apache 2.0

Open weights

Release Timeline

When each model was launched

GPT-6 Luna was released on 2026-09-22, while Mistral Large 3 (675B Instruct 2512 Eagle) was released on 2025-12-04.

GPT-6 Luna is 10 months newer than Mistral Large 3 (675B Instruct 2512 Eagle).

GPT-6 Luna

Sep 22, 2026

0 days ago

9mo newer
Mistral Large 3 (675B Instruct 2512 Eagle)

Dec 4, 2025

9 months ago

Knowledge Cutoff

When training data ends

GPT-6 Luna has a documented knowledge cutoff of 2026-05-18, while Mistral Large 3 (675B Instruct 2512 Eagle)'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 Mistral Large 3 (675B Instruct 2512 Eagle)'s cutoff date.

GPT-6 Luna

May 2026

Mistral Large 3 (675B Instruct 2512 Eagle)

—

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against GPT-6 Luna and Mistral Large 3 (675B Instruct 2512 Eagle) side-by-side, then vote on the output you prefer.

GPT-6 Luna
✓ Preferred
Mistral Large 3 (675B Instruct 2512 Eagle)
Open in Playground

FAQ

Common questions about GPT-6 Luna vs Mistral Large 3 (675B Instruct 2512 Eagle).

Which is better, GPT-6 Luna or Mistral Large 3 (675B Instruct 2512 Eagle)?

GPT-6 Luna leads the LLM Stats Score 44.5 to 8.7. GPT-6 Luna is made by OpenAI and Mistral Large 3 (675B Instruct 2512 Eagle) is made by Mistral AI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does GPT-6 Luna compare to Mistral Large 3 (675B Instruct 2512 Eagle) in benchmarks?

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%. Mistral Large 3 (675B Instruct 2512 Eagle) scores MMMLU: 85.5%, AMC_2022_23: 52.0%, GPQA: 43.9%, LiveCodeBench: 34.4%, SimpleQA: 23.8%.

What are the context window sizes for GPT-6 Luna and Mistral Large 3 (675B Instruct 2512 Eagle)?

GPT-6 Luna supports 1.1M tokens and Mistral Large 3 (675B Instruct 2512 Eagle) supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT-6 Luna and Mistral Large 3 (675B Instruct 2512 Eagle)?

Key differences include LLM Stats Score (44.5 vs 8.7), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-6 Luna and Mistral Large 3 (675B Instruct 2512 Eagle)?

GPT-6 Luna is developed by OpenAI and Mistral Large 3 (675B Instruct 2512 Eagle) is developed by Mistral AI.

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