Model Comparison

o1 vs Step3-VL-10BWhich is better in 2026?

Step3-VL-10B significantly outperforms across most benchmarks.

Verdict: o1 vs Step3-VL-10B — which is better?

o1 (by OpenAI) and Step3-VL-10B (by StepFun) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

o1 outperforms in 0 benchmarks, while Step3-VL-10B is better at 2 benchmarks (MathVista, MMMU). Step3-VL-10B significantly outperforms across most benchmarks.

Choose o1 if…

  • you want predictable pricing at $15.00/M input and $60.00/M output

Choose Step3-VL-10B if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
  • you want the most recent training data — it shipped Jan 2026
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

o1 outperforms in 0 benchmarks, while Step3-VL-10B is better at 2 benchmarks (MathVista, MMMU).

Step3-VL-10B significantly outperforms across most benchmarks.

Tue Jul 21 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only o1 specifies input context (200,000 tokens). Only o1 specifies output context (100,000 tokens).

OpenAI
o1
Input200,000 tokens
Output100,000 tokens
StepFun
Step3-VL-10B
Input- tokens
Output- tokens
Tue Jul 21 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Step3-VL-10B supports multimodal inputs, whereas o1 does not.

Step3-VL-10B can handle both text and other forms of data like images, making it suitable for multimodal applications.

o1

Text
Images
Audio
Video

Step3-VL-10B

Text
Images
Audio
Video

License

Usage and distribution terms

o1 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.

o1

Proprietary

Closed source

Step3-VL-10B

Apache 2.0

Open weights

Release Timeline

When each model was launched

o1 was released on 2024-12-17, while Step3-VL-10B was released on 2026-01-15.

Step3-VL-10B is 13 months newer than o1.

o1

Dec 17, 2024

1.6 years ago

Step3-VL-10B

Jan 15, 2026

6 months ago

1.1yr newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Larger context window (200,000 tokens)
StepFun
Supports multimodal inputs
Has open weights
Higher MathVista score (84.0% vs 71.8%)
Higher MMMU score (78.1% vs 77.6%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against o1 and Step3-VL-10B side-by-side, then vote on the output you prefer.

o1
✓ Preferred
Step3-VL-10B
Open in Playground
AI Model Comparison Table
Feature
OpenAI
o1
StepFun
Step3-VL-10B

FAQ

Common questions about o1 vs Step3-VL-10B.

Which is better, o1 or Step3-VL-10B?

Step3-VL-10B significantly outperforms across most benchmarks. o1 is made by OpenAI and Step3-VL-10B is made by StepFun. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does o1 compare to Step3-VL-10B in benchmarks?

o1 scores GSM8k: 97.1%, MATH: 96.4%, GPQA Physics: 92.8%, MMLU: 91.8%, MGSM: 89.3%. 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 o1 and Step3-VL-10B?

o1 supports 200K 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 o1 and Step3-VL-10B?

Key differences include multimodal support (no vs yes), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes o1 and Step3-VL-10B?

o1 is developed by OpenAI and Step3-VL-10B is developed by StepFun.

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