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Claude Sonnet 5.5 vs Seed 2.0 Lite

Claude Sonnet 5.5 leads the LLM Stats Score 58.4 to 31.5.

Anthropic · ByteDance · Updated for 2026

Which is better?

Claude Sonnet 5.5 leads the overall LLM Stats Score 58.4 to 31.5, ranking #2 overall.

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

Choose Claude Sonnet 5.5

  • overall performance matters — it scores 58.4 and ranks #2 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose Seed 2.0 Lite

  • you are already invested in the ByteDance ecosystem

At a glance

The differences that matter most.

Claude Sonnet 5.5
Anthropic
Seed 2.0 Lite
ByteDance
Core performance indexes
LLM Stats Score
58.4
#2
31.5
#132
Reasoning
57.2
#3
31.1
#131
Coding
47.6
#2
17.9
#134
Cost, coverage & limits
Benchmark wins
—
—
Input price
$2.00 / M
— / M
Output price
$10.00 / M
— / M
Context window
1,000,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Sonnet 5.5
Seed 2.0 Lite
Math
38.7#25
25.1#121
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

47 reported for Claude Sonnet 5.5 · 5 for Seed 2.0 Lite

No common benchmarks found

Claude Sonnet 5.5 and Seed 2.0 Litedon'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 Claude Sonnet 5.5 specifies input context (1,000,000 tokens). Only Claude Sonnet 5.5 specifies output context (128,000 tokens).

Anthropic
Claude Sonnet 5.5
Input1,000,000 tokens
Output128,000 tokens
ByteDance
Seed 2.0 Lite
Input- tokens
Output- tokens
Sat Oct 24 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Sonnet 5.5 and Seed 2.0 Lite support multimodal inputs.

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

Claude Sonnet 5.5

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.

Claude Sonnet 5.5

Proprietary

Closed source

Seed 2.0 Lite

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Sonnet 5.5 was released on 2026-09-28, while Seed 2.0 Lite was released on 2026-02-14.

Claude Sonnet 5.5 is 8 months newer than Seed 2.0 Lite.

Claude Sonnet 5.5

Sep 28, 2026

3 weeks ago

7mo newer
Seed 2.0 Lite

Feb 14, 2026

8 months ago

Knowledge Cutoff

When training data ends

Claude Sonnet 5.5 has a knowledge cutoff of 2026-06-01, while Seed 2.0 Lite has a cutoff of 2024-01-01.

Claude Sonnet 5.5 has more recent training data (up to 2026-06-01), making it potentially better informed about events through that date compared to Seed 2.0 Lite (2024-01-01).

Claude Sonnet 5.5

Jun 2026

2.4 yr newer
Seed 2.0 Lite

Jan 2024

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Sonnet 5.5 and Seed 2.0 Lite side-by-side, then vote on the output you prefer.

Claude Sonnet 5.5
✓ Preferred
Seed 2.0 Lite
Open in Playground

FAQ

Common questions about Claude Sonnet 5.5 vs Seed 2.0 Lite.

Which is better, Claude Sonnet 5.5 or Seed 2.0 Lite?

Claude Sonnet 5.5 leads the LLM Stats Score 58.4 to 31.5. Claude Sonnet 5.5 is made by Anthropic and Seed 2.0 Lite is made by ByteDance. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Sonnet 5.5 compare to Seed 2.0 Lite in benchmarks?

Claude Sonnet 5.5 scores BenchCAD (with Python tool): 96.3%, ArXivMath (with tools): 95.2%, Global-MMLU: 92.1%, MILU: 91.6%, SWE-bench Multilingual: 90.3%. 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 Claude Sonnet 5.5 and Seed 2.0 Lite?

Claude Sonnet 5.5 supports 1.0M 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 Claude Sonnet 5.5 and Seed 2.0 Lite?

Key differences include LLM Stats Score (58.4 vs 31.5). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Sonnet 5.5 and Seed 2.0 Lite?

Claude Sonnet 5.5 is developed by Anthropic and Seed 2.0 Lite is developed by ByteDance.

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