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Claude Sonnet 5.5 vs ERNIE 5.0

Claude Sonnet 5.5 leads the LLM Stats Score 58.4 to 33.2.

Anthropic · Baidu · Updated for 2026

Which is better?

Claude Sonnet 5.5 leads the overall LLM Stats Score 58.4 to 33.2, 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 — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose ERNIE 5.0

  • you are already invested in the Baidu ecosystem

At a glance

The differences that matter most.

Claude Sonnet 5.5
Anthropic
ERNIE 5.0
Baidu
Core performance indexes
LLM Stats Score
58.4
#2
33.2
#121
Reasoning
57.2
#3
32.8
#119
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
ERNIE 5.0
Math
38.7#25
31.1#77
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

47 reported for Claude Sonnet 5.5 · 5 for ERNIE 5.0

No common benchmarks found

Claude Sonnet 5.5 and ERNIE 5.0don'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
Baidu
ERNIE 5.0
Input- tokens
Output- tokens
Fri Oct 23 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Sonnet 5.5 and ERNIE 5.0 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

ERNIE 5.0

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

ERNIE 5.0

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Sonnet 5.5 was released on 2026-09-28, while ERNIE 5.0 was released on 2026-01-22.

Claude Sonnet 5.5 is 8 months newer than ERNIE 5.0.

Claude Sonnet 5.5

Sep 28, 2026

3 weeks ago

8mo newer
ERNIE 5.0

Jan 22, 2026

9 months ago

Knowledge Cutoff

When training data ends

Claude Sonnet 5.5 has a documented knowledge cutoff of 2026-06-01, while ERNIE 5.0's cutoff date is not specified.

We can confirm Claude Sonnet 5.5's training data extends to 2026-06-01, but cannot make a direct comparison without ERNIE 5.0's cutoff date.

Claude Sonnet 5.5

Jun 2026

ERNIE 5.0

—

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Sonnet 5.5 and ERNIE 5.0 side-by-side, then vote on the output you prefer.

Claude Sonnet 5.5
✓ Preferred
ERNIE 5.0
Open in Playground

FAQ

Common questions about Claude Sonnet 5.5 vs ERNIE 5.0.

Which is better, Claude Sonnet 5.5 or ERNIE 5.0?

Claude Sonnet 5.5 leads the LLM Stats Score 58.4 to 33.2. Claude Sonnet 5.5 is made by Anthropic and ERNIE 5.0 is made by Baidu. 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 ERNIE 5.0 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%. ERNIE 5.0 scores AIME 2025: 87.0%, MMLU-Pro: 87.0%, GPQA: 85.0%, SimpleQA: 75.0%, Humanity's Last Exam: 39.0%.

What are the context window sizes for Claude Sonnet 5.5 and ERNIE 5.0?

Claude Sonnet 5.5 supports 1.0M tokens and ERNIE 5.0 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 ERNIE 5.0?

Key differences include LLM Stats Score (58.4 vs 33.2). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Sonnet 5.5 and ERNIE 5.0?

Claude Sonnet 5.5 is developed by Anthropic and ERNIE 5.0 is developed by Baidu.

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