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Model Comparison

GPT OSS 120B High vs Seed 2.0 LiteWhich is better in 2026?

Seed 2.0 Lite shows notably better performance in the majority of benchmarks.

Verdict: GPT OSS 120B High vs Seed 2.0 Lite — which is better?

GPT OSS 120B High (by OpenAI) and Seed 2.0 Lite (by ByteDance) 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.

GPT OSS 120B High outperforms in 1 benchmarks (LiveCodeBench v6), while Seed 2.0 Lite is better at 2 benchmarks (AIME 2025, GPQA). Seed 2.0 Lite shows notably better performance in the majority of benchmarks.

Choose GPT OSS 120B High if…

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

Choose Seed 2.0 Lite if…

  • you want the strongest raw capability — it leads on 2 of 3 shared benchmarks
  • you want the most recent training data — it shipped Feb 2026

Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

GPT OSS 120B High outperforms in 1 benchmarks (LiveCodeBench v6), while Seed 2.0 Lite is better at 2 benchmarks (AIME 2025, GPQA).

Seed 2.0 Lite shows notably better performance in the majority of benchmarks.

Fri Aug 07 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only GPT OSS 120B High specifies input context (131,072 tokens). Only GPT OSS 120B High specifies output context (131,072 tokens).

OpenAI
GPT OSS 120B High
Input131,072 tokens
Output131,072 tokens
ByteDance
Seed 2.0 Lite
Input- tokens
Output- tokens
Fri Aug 07 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Seed 2.0 Lite supports multimodal inputs, whereas GPT OSS 120B High does not.

Seed 2.0 Lite can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT OSS 120B High

Text
Images
Audio
Video

Seed 2.0 Lite

Text
Images
Audio
Video

License

Usage and distribution terms

GPT OSS 120B High is licensed under Apache 2.0, while Seed 2.0 Lite uses a proprietary license.

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

GPT OSS 120B High

Apache 2.0

Open weights

Seed 2.0 Lite

Proprietary

Closed source

Release Timeline

When each model was launched

GPT OSS 120B High was released on 2025-08-05, while Seed 2.0 Lite was released on 2026-02-14.

Seed 2.0 Lite is 6 months newer than GPT OSS 120B High.

GPT OSS 120B High

Aug 5, 2025

1.0 years ago

Seed 2.0 Lite

Feb 14, 2026

5 months ago

6mo newer

Knowledge Cutoff

When training data ends

Seed 2.0 Lite has a documented knowledge cutoff of 2024-01-01, while GPT OSS 120B High's cutoff date is not specified.

We can confirm Seed 2.0 Lite's training data extends to 2024-01-01, but cannot make a direct comparison without GPT OSS 120B High's cutoff date.

GPT OSS 120B High

—

Seed 2.0 Lite

Jan 2024

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Larger context window (131,072 tokens)
Has open weights
Higher LiveCodeBench v6 score (81.9% vs 81.7%)
ByteDance
Supports multimodal inputs
Higher AIME 2025 score (93.0% vs 92.5%)
Higher GPQA score (85.1% vs 80.9%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT OSS 120B High and Seed 2.0 Lite side-by-side, then vote on the output you prefer.

GPT OSS 120B High
✓ Preferred
Seed 2.0 Lite
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT OSS 120B High
ByteDance
Seed 2.0 Lite

FAQ

Common questions about GPT OSS 120B High vs Seed 2.0 Lite.

Which is better, GPT OSS 120B High or Seed 2.0 Lite?

Seed 2.0 Lite shows notably better performance in the majority of benchmarks. GPT OSS 120B High is made by OpenAI and Seed 2.0 Lite is made by ByteDance. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT OSS 120B High compare to Seed 2.0 Lite in benchmarks?

GPT OSS 120B High scores AIME 2025: 92.5%, MMMLU: 83.8%, LiveCodeBench v6: 81.9%, GPQA: 80.9%, MMLU-Pro: 80.7%. Seed 2.0 Lite scores AIME 2025: 93.0%, AIME 2026: 88.3%, GPQA: 85.1%, LiveCodeBench v6: 81.7%, SWE-Bench Verified: 73.5%.

What are the context window sizes for GPT OSS 120B High and Seed 2.0 Lite?

GPT OSS 120B High supports 131K tokens and Seed 2.0 Lite 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 OSS 120B High and Seed 2.0 Lite?

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

Who makes GPT OSS 120B High and Seed 2.0 Lite?

GPT OSS 120B High is developed by OpenAI and Seed 2.0 Lite is developed by ByteDance.

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