Model Comparison

GPT-5.6 Terra vs Step3-VL-10BWhich is better in 2026?

Comparing GPT-5.6 Terra and Step3-VL-10B across benchmarks, pricing, and capabilities.

Verdict: GPT-5.6 Terra vs Step3-VL-10B — which is better?

GPT-5.6 Terra (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.

Choose GPT-5.6 Terra if…

  • you want the most recent training data — it shipped Jul 2026

Choose Step3-VL-10B if…

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

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

GPT-5.6 Terra and Step3-VL-10Bdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only GPT-5.6 Terra specifies input context (1,050,000 tokens). Only GPT-5.6 Terra specifies output context (128,000 tokens).

OpenAI
GPT-5.6 Terra
Input1,050,000 tokens
Output128,000 tokens
StepFun
Step3-VL-10B
Input- tokens
Output- tokens
Tue Jul 21 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.6 Terra and Step3-VL-10B support multimodal inputs.

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

GPT-5.6 Terra

Text
Images
Audio
Video

Step3-VL-10B

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-5.6 Terra 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-5.6 Terra

Proprietary

Closed source

Step3-VL-10B

Apache 2.0

Open weights

Release Timeline

When each model was launched

GPT-5.6 Terra was released on 2026-07-09, while Step3-VL-10B was released on 2026-01-15.

GPT-5.6 Terra is 6 months newer than Step3-VL-10B.

GPT-5.6 Terra

Jul 9, 2026

1 weeks ago

5mo newer
Step3-VL-10B

Jan 15, 2026

6 months ago

Knowledge Cutoff

When training data ends

GPT-5.6 Terra has a documented knowledge cutoff of 2026-02-16, while Step3-VL-10B's cutoff date is not specified.

We can confirm GPT-5.6 Terra's training data extends to 2026-02-16, but cannot make a direct comparison without Step3-VL-10B's cutoff date.

GPT-5.6 Terra

Feb 2026

Step3-VL-10B

—

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Larger context window (1,050,000 tokens)
StepFun
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT-5.6 Terra and Step3-VL-10B side-by-side, then vote on the output you prefer.

GPT-5.6 Terra
✓ Preferred
Step3-VL-10B
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT-5.6 Terra
StepFun
Step3-VL-10B

FAQ

Common questions about GPT-5.6 Terra vs Step3-VL-10B.

Which is better, GPT-5.6 Terra or Step3-VL-10B?

GPT-5.6 Terra (OpenAI) and Step3-VL-10B (StepFun) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does GPT-5.6 Terra compare to Step3-VL-10B in benchmarks?

GPT-5.6 Terra scores Connectors: 100.0%, HealthBench Consensus: 95.1%, Search and Function-Calling: 94.6%, GPQA: 92.9%, Capture-the-Flag Challenges (Internal): 91.8%. 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-5.6 Terra and Step3-VL-10B?

GPT-5.6 Terra 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-5.6 Terra and Step3-VL-10B?

Key differences include licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5.6 Terra and Step3-VL-10B?

GPT-5.6 Terra is developed by OpenAI and Step3-VL-10B is developed by StepFun.

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