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Claude Fable 5.1 vs Seed 2.0 Lite

Claude Fable 5.1 leads the LLM Stats Score 55.7 to 31.9.

Anthropic · ByteDance · Updated for 2026

Which is better?

Claude Fable 5.1 leads the overall LLM Stats Score 55.7 to 31.9, ranking #2 overall.

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

Choose Claude Fable 5.1

  • overall performance matters — it scores 55.7 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 Fable 5.1
Anthropic
Seed 2.0 Lite
ByteDance
Core performance indexes
LLM Stats Score
55.7
#2
31.9
#108
Reasoning
52.8
#5
31.5
#107
Coding
35.5
#27
17.9
#114
Cost, coverage & limits
Benchmark wins
—
—
Input price
$10.00 / M
— / M
Output price
$50.00 / M
— / M
Context window
1,000,000
—

Individual benchmarks

7 reported for Claude Fable 5.1 · 5 for Seed 2.0 Lite

No common benchmarks found

Claude Fable 5.1 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 Fable 5.1 specifies input context (1,000,000 tokens). Only Claude Fable 5.1 specifies output context (128,000 tokens).

Anthropic
Claude Fable 5.1
Input1,000,000 tokens
Output128,000 tokens
ByteDance
Seed 2.0 Lite
Input- tokens
Output- tokens
Mon Sep 21 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Fable 5.1 and Seed 2.0 Lite support multimodal inputs.

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

Claude Fable 5.1

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 Fable 5.1

Proprietary

Closed source

Seed 2.0 Lite

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Fable 5.1 was released on 2026-09-01, while Seed 2.0 Lite was released on 2026-02-14.

Claude Fable 5.1 is 7 months newer than Seed 2.0 Lite.

Claude Fable 5.1

Sep 1, 2026

2 weeks ago

6mo newer
Seed 2.0 Lite

Feb 14, 2026

7 months ago

Knowledge Cutoff

When training data ends

Seed 2.0 Lite has a documented knowledge cutoff of 2024-01-01, while Claude Fable 5.1'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 Claude Fable 5.1's cutoff date.

Claude Fable 5.1

—

Seed 2.0 Lite

Jan 2024

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Claude Fable 5.1 and Seed 2.0 Lite side-by-side, then vote on the output you prefer.

Claude Fable 5.1
✓ Preferred
Seed 2.0 Lite
Open in Playground

FAQ

Common questions about Claude Fable 5.1 vs Seed 2.0 Lite.

Which is better, Claude Fable 5.1 or Seed 2.0 Lite?

Claude Fable 5.1 leads the LLM Stats Score 55.7 to 31.9. Claude Fable 5.1 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 Fable 5.1 compare to Seed 2.0 Lite in benchmarks?

Claude Fable 5.1 scores OSWorld 2.0: 77.9%, CursorBench v3.2: 73.4%, Humanity's Last Exam: 65.0%, GDPval-AA: 61.8%, Terminal-Bench 4.0: 55.8%. 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 Claude Fable 5.1 and Seed 2.0 Lite?

Claude Fable 5.1 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 Fable 5.1 and Seed 2.0 Lite?

Key differences include LLM Stats Score (55.7 vs 31.9). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Fable 5.1 and Seed 2.0 Lite?

Claude Fable 5.1 is developed by Anthropic and Seed 2.0 Lite is developed by ByteDance.

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