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GPT-6 Luna vs Phi-3.5-MoE-instruct

GPT-6 Luna leads the LLM Stats Score 44.5 to 1.9.

OpenAI · Microsoft · Updated for 2026

Which is better?

GPT-6 Luna leads the overall LLM Stats Score 44.5 to 1.9, ranking #41 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 #41 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 Phi-3.5-MoE-instruct

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

At a glance

The differences that matter most.

GPT-6 Luna
OpenAI
Phi-3.5-MoE-instruct
Microsoft
Core performance indexes
LLM Stats Score
44.5
#41
1.9
#324
Reasoning
40.0
#58
1.4
#317
Coding
31.4
#47
-3.8
#260
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 · 31 for Phi-3.5-MoE-instruct

No common benchmarks found

GPT-6 Luna and Phi-3.5-MoE-instructdon'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
Microsoft
Phi-3.5-MoE-instruct
Input- tokens
Output- tokens
Thu Sep 24 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

GPT-6 Luna supports multimodal inputs, whereas Phi-3.5-MoE-instruct does not.

GPT-6 Luna can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-6 Luna

Text
Images
Audio
Video

Phi-3.5-MoE-instruct

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-6 Luna is licensed under a proprietary license, while Phi-3.5-MoE-instruct uses MIT.

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

GPT-6 Luna

Proprietary

Closed source

Phi-3.5-MoE-instruct

MIT

Open weights

Release Timeline

When each model was launched

GPT-6 Luna was released on 2026-09-22, while Phi-3.5-MoE-instruct was released on 2024-08-23.

GPT-6 Luna is 25 months newer than Phi-3.5-MoE-instruct.

GPT-6 Luna

Sep 22, 2026

0 days ago

2.1yr newer
Phi-3.5-MoE-instruct

Aug 23, 2024

2.1 years ago

Knowledge Cutoff

When training data ends

GPT-6 Luna has a documented knowledge cutoff of 2026-05-18, while Phi-3.5-MoE-instruct'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 Phi-3.5-MoE-instruct's cutoff date.

GPT-6 Luna

May 2026

Phi-3.5-MoE-instruct

—

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against GPT-6 Luna and Phi-3.5-MoE-instruct side-by-side, then vote on the output you prefer.

GPT-6 Luna
✓ Preferred
Phi-3.5-MoE-instruct
Open in Playground

FAQ

Common questions about GPT-6 Luna vs Phi-3.5-MoE-instruct.

Which is better, GPT-6 Luna or Phi-3.5-MoE-instruct?

GPT-6 Luna leads the LLM Stats Score 44.5 to 1.9. GPT-6 Luna is made by OpenAI and Phi-3.5-MoE-instruct is made by Microsoft. 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 Phi-3.5-MoE-instruct 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%. Phi-3.5-MoE-instruct scores ARC-C: 91.0%, OpenBookQA: 89.6%, GSM8k: 88.7%, PIQA: 88.6%, RULER: 87.1%.

What are the context window sizes for GPT-6 Luna and Phi-3.5-MoE-instruct?

GPT-6 Luna supports 1.1M tokens and Phi-3.5-MoE-instruct 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 Phi-3.5-MoE-instruct?

Key differences include LLM Stats Score (44.5 vs 1.9), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-6 Luna and Phi-3.5-MoE-instruct?

GPT-6 Luna is developed by OpenAI and Phi-3.5-MoE-instruct is developed by Microsoft.

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