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GPT-6 Luna vs Step3-VL-10B

GPT-6 Luna leads the LLM Stats Score 43.1 to 25.2.

OpenAI · StepFun · Updated for 2026

Which is better?

GPT-6 Luna leads the overall LLM Stats Score 43.1 to 25.2, ranking #55 overall.

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

Choose GPT-6 Luna

  • overall performance matters — it scores 43.1 and ranks #55 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose Step3-VL-10B

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

At a glance

The differences that matter most.

GPT-6 Luna
OpenAI
Step3-VL-10B
StepFun
Core performance indexes
LLM Stats Score
43.1
#55
25.2
#182
Reasoning
39.9
#69
25.2
#176
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 · 6 for Step3-VL-10B

No common benchmarks found

GPT-6 Luna and Step3-VL-10Bdon'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
StepFun
Step3-VL-10B
Input- tokens
Output- tokens
Fri Oct 23 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both GPT-6 Luna and Step3-VL-10B support multimodal inputs.

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

GPT-6 Luna

Text
Images
Audio
Video

Step3-VL-10B

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-6 Luna is licensed under a proprietary license, while Step3-VL-10B 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

Step3-VL-10B

Apache 2.0

Open weights

Release Timeline

When each model was launched

GPT-6 Luna was released on 2026-09-22, while Step3-VL-10B was released on 2026-01-15.

GPT-6 Luna is 8 months newer than Step3-VL-10B.

GPT-6 Luna

Sep 22, 2026

4 weeks ago

8mo newer
Step3-VL-10B

Jan 15, 2026

9 months ago

Knowledge Cutoff

When training data ends

GPT-6 Luna has a documented knowledge cutoff of 2026-05-18, while Step3-VL-10B'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 Step3-VL-10B's cutoff date.

GPT-6 Luna

May 2026

Step3-VL-10B

—

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against GPT-6 Luna and Step3-VL-10B side-by-side, then vote on the output you prefer.

GPT-6 Luna
✓ Preferred
Step3-VL-10B
Open in Playground

FAQ

Common questions about GPT-6 Luna vs Step3-VL-10B.

Which is better, GPT-6 Luna or Step3-VL-10B?

GPT-6 Luna leads the LLM Stats Score 43.1 to 25.2. GPT-6 Luna is made by OpenAI and Step3-VL-10B is made by StepFun. 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 Step3-VL-10B 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%. Step3-VL-10B scores MMBench: 91.8%, AIME 2025: 87.7%, MathVista: 84.0%, MMMU: 78.1%, MathVision: 70.8%.

What are the context window sizes for GPT-6 Luna and Step3-VL-10B?

GPT-6 Luna supports 1.1M tokens and Step3-VL-10B 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 Step3-VL-10B?

Key differences include LLM Stats Score (43.1 vs 25.2), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-6 Luna and Step3-VL-10B?

GPT-6 Luna is developed by OpenAI and Step3-VL-10B is developed by StepFun.

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