Model Comparison

GPT-5.6 Terra vs Seed 2.0 LiteWhich is better in 2026?

GPT-5.6 Terra significantly outperforms across most benchmarks.

Verdict: GPT-5.6 Terra vs Seed 2.0 Lite — which is better?

GPT-5.6 Terra (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-5.6 Terra outperforms in 1 benchmarks (GPQA), while Seed 2.0 Lite is better at 0 benchmarks. GPT-5.6 Terra significantly outperforms across most benchmarks.

Choose GPT-5.6 Terra if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you want the most recent training data — it shipped Jul 2026

Choose Seed 2.0 Lite if…

  • you are already invested in the ByteDance ecosystem

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

GPT-5.6 Terra outperforms in 1 benchmarks (GPQA), while Seed 2.0 Lite is better at 0 benchmarks.

GPT-5.6 Terra 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 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
ByteDance
Seed 2.0 Lite
Input- tokens
Output- tokens
Tue Jul 21 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.6 Terra and Seed 2.0 Lite 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

Seed 2.0 Lite

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

GPT-5.6 Terra

Proprietary

Closed source

Seed 2.0 Lite

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5.6 Terra was released on 2026-07-09, while Seed 2.0 Lite was released on 2026-02-14.

GPT-5.6 Terra is 5 months newer than Seed 2.0 Lite.

GPT-5.6 Terra

Jul 9, 2026

1 weeks ago

4mo newer
Seed 2.0 Lite

Feb 14, 2026

5 months ago

Knowledge Cutoff

When training data ends

GPT-5.6 Terra has a knowledge cutoff of 2026-02-16, while Seed 2.0 Lite has a cutoff of 2024-01-01.

GPT-5.6 Terra has more recent training data (up to 2026-02-16), making it potentially better informed about events through that date compared to Seed 2.0 Lite (2024-01-01).

GPT-5.6 Terra

Feb 2026

2.1 yr newer
Seed 2.0 Lite

Jan 2024

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (1,050,000 tokens)
Higher GPQA score (92.9% vs 85.1%)
ByteDance

No standout differentiators in the data we have for this pair.

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT-5.6 Terra and Seed 2.0 Lite side-by-side, then vote on the output you prefer.

GPT-5.6 Terra
✓ Preferred
Seed 2.0 Lite
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT-5.6 Terra
ByteDance
Seed 2.0 Lite

FAQ

Common questions about GPT-5.6 Terra vs Seed 2.0 Lite.

Which is better, GPT-5.6 Terra or Seed 2.0 Lite?

GPT-5.6 Terra significantly outperforms across most benchmarks. GPT-5.6 Terra 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-5.6 Terra compare to Seed 2.0 Lite 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%. 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-5.6 Terra and Seed 2.0 Lite?

GPT-5.6 Terra supports 1.1M 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.

Who makes GPT-5.6 Terra and Seed 2.0 Lite?

GPT-5.6 Terra is developed by OpenAI and Seed 2.0 Lite is developed by ByteDance.

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