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Claude Opus 5.5 vs ERNIE 4.5

Claude Opus 5.5 leads the LLM Stats Score 59.7 to -13.4. ERNIE 4.5 is 6.2x cheaper per token.

Anthropic · Baidu · Updated for 2026

Which is better?

Claude Opus 5.5 leads the overall LLM Stats Score 59.7 to -13.4, ranking #1 overall.

On price, ERNIE 4.5 is roughly 6.2x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Claude Opus 5.5 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

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

Choose Claude Opus 5.5

  • overall performance matters — it scores 59.7 and ranks #1 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Sep 2026

Choose ERNIE 4.5

  • cost matters — it's about 6.2x cheaper per token

At a glance

The differences that matter most.

Claude Opus 5.5
Anthropic
ERNIE 4.5
Baidu
Core performance indexes
LLM Stats Score
59.7
#1
-13.4
#375
Reasoning
57.8
#1
-13.4
#369
Cost, coverage & limits
Benchmark wins
—
—
Input price
$4.00 / M
$0.40 / M
Output price
$20.00 / M
$4.00 / M
Context window
1,000,000
128,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Opus 5.5
ERNIE 4.5
Math
42.5#5
-16.3#328
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

31 reported for Claude Opus 5.5 · 20 for ERNIE 4.5

No common benchmarks found

Claude Opus 5.5 and ERNIE 4.5don'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

Pricing Analysis

Price comparison per million tokens

ERNIE 4.5 costs less

For input processing, Claude Opus 5.5 ($4.00/1M tokens) is 10.0x more expensive than ERNIE 4.5 ($0.40/1M tokens).

For output processing, Claude Opus 5.5 ($20.00/1M tokens) is 5.0x more expensive than ERNIE 4.5 ($4.00/1M tokens).

In conclusion, Claude Opus 5.5 is more expensive than ERNIE 4.5.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Wed Sep 23 2026 • llm-stats.com
Anthropic
Claude Opus 5.5
Input tokens$4.00
Output tokens$20.00
Best providerAnthropic
Baidu
ERNIE 4.5
Input tokens$0.40
Output tokens$4.00
Best providerNovita
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude Opus 5.5 accepts 1,000,000 input tokens compared to ERNIE 4.5's 128,000 tokens. Claude Opus 5.5 can generate longer responses up to 128,000 tokens, while ERNIE 4.5 is limited to 65,536 tokens.

Anthropic
Claude Opus 5.5
Input1,000,000 tokens
Output128,000 tokens
Baidu
ERNIE 4.5
Input128,000 tokens
Output65,536 tokens
Wed Sep 23 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Opus 5.5 supports multimodal inputs, whereas ERNIE 4.5 does not.

Claude Opus 5.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Opus 5.5

Text
Images
Audio
Video

ERNIE 4.5

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 Opus 5.5

Proprietary

Closed source

ERNIE 4.5

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 5.5 was released on 2026-09-22, while ERNIE 4.5 was released on 2025-06-25.

Claude Opus 5.5 is 15 months newer than ERNIE 4.5.

Claude Opus 5.5

Sep 22, 2026

0 days ago

1.2yr newer
ERNIE 4.5

Jun 25, 2025

1.2 years ago

Knowledge Cutoff

When training data ends

Claude Opus 5.5 has a documented knowledge cutoff of 2026-06-01, while ERNIE 4.5's cutoff date is not specified.

We can confirm Claude Opus 5.5's training data extends to 2026-06-01, but cannot make a direct comparison without ERNIE 4.5's cutoff date.

Claude Opus 5.5

Jun 2026

ERNIE 4.5

—

Provider Availability

Claude Opus 5.5 is available from Anthropic. ERNIE 4.5 is available from Novita.

Claude Opus 5.5

anthropic logo
Anthropic
Input Price:Input: $4.00/1MOutput Price:Output: $20.00/1M

ERNIE 4.5

novita logo
Novita
Input Price:Input: $0.40/1MOutput Price:Output: $4.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Claude Opus 5.5 and ERNIE 4.5 side-by-side, then vote on the output you prefer.

Claude Opus 5.5
✓ Preferred
ERNIE 4.5
Open in Playground

FAQ

Common questions about Claude Opus 5.5 vs ERNIE 4.5.

Which is better, Claude Opus 5.5 or ERNIE 4.5?

Claude Opus 5.5 leads the LLM Stats Score 59.7 to -13.4. Claude Opus 5.5 is made by Anthropic and ERNIE 4.5 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 Opus 5.5 compare to ERNIE 4.5 in benchmarks?

Claude Opus 5.5 scores BenchCAD (with Python tool): 96.2%, Global-MMLU: 94.3%, SWE-bench Multilingual: 93.9%, MILU: 93.1%, ArXivMath: 91.2%. ERNIE 4.5 scores GPQA: 74.0%, ARC-E: 60.7%, PIQA: 55.2%, Winogrande: 51.3%, CLUEWSC: 48.6%.

Is Claude Opus 5.5 cheaper than ERNIE 4.5?

ERNIE 4.5 is 10.0x cheaper for input tokens. Claude Opus 5.5 costs $4.00/M input and $20.00/M output via anthropic. ERNIE 4.5 costs $0.40/M input and $4.00/M output via novita.

What are the context window sizes for Claude Opus 5.5 and ERNIE 4.5?

Claude Opus 5.5 supports 1.0M tokens and ERNIE 4.5 supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Opus 5.5 and ERNIE 4.5?

Key differences include LLM Stats Score (59.7 vs -13.4), context window (1.0M vs 128K), input pricing ($4.00 vs $0.40/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 5.5 and ERNIE 4.5?

Claude Opus 5.5 is developed by Anthropic and ERNIE 4.5 is developed by Baidu.

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