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Claude Opus 4.5 vs ERNIE 5.5 Flash Preview

ERNIE 5.5 Flash Preview leads the LLM Stats Score 52.3 to 37.6. ERNIE 5.5 Flash Preview is 20.3x cheaper per token.

Anthropic · Baidu · Updated for 2026

Which is better?

ERNIE 5.5 Flash Preview leads the overall LLM Stats Score 52.3 to 37.6, ranking #13 overall.

In the 1 individual benchmarks reported for both models, ERNIE 5.5 Flash Preview wins 1; this is a narrower head-to-head signal than the composite indexes.

On price, ERNIE 5.5 Flash Preview is roughly 20.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

ERNIE 5.5 Flash Preview also accepts a larger context window (1,048,576 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 4.5

  • you want predictable pricing at $5.00/M input and $25.00/M output

Choose ERNIE 5.5 Flash Preview

  • overall performance matters — it scores 52.3 and ranks #13 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results
  • cost matters — it's about 20.3x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Nov 2026

At a glance

The differences that matter most.

Claude Opus 4.5
Anthropic
ERNIE 5.5 Flash Preview
Baidu
Core performance indexes
LLM Stats Score
37.6
#98
52.3
#13
Reasoning
39.5
#80
50.7
#12
Coding
27.1
#87
37.9
#20
Agents
16.6
#110
38.5
#11
Cost, coverage & limits
Benchmark wins
0 of 1
1 of 1
Input price
$5.00 / M
$0.28 / M
Output price
$25.00 / M
$1.13 / M
Context window
200,000
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Opus 4.5
ERNIE 5.5 Flash Preview
Tool use
20.8#77
32.2#8
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

11 reported for Claude Opus 4.5 · 13 for ERNIE 5.5 Flash Preview

1 shared

Claude Opus 4.5 outperforms in 0 benchmarks, while ERNIE 5.5 Flash Preview is better at 1 benchmark (MCP Atlas).

ERNIE 5.5 Flash Preview significantly outperforms across most benchmarks.

Fri Nov 13 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

ERNIE 5.5 Flash Preview costs less

For input processing, Claude Opus 4.5 ($5.00/1M tokens) is 17.9x more expensive than ERNIE 5.5 Flash Preview ($0.28/1M tokens).

For output processing, Claude Opus 4.5 ($25.00/1M tokens) is 22.1x more expensive than ERNIE 5.5 Flash Preview ($1.13/1M tokens).

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

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

Lowest available price from all providers
Fri Nov 13 2026 • llm-stats.com
Anthropic
Claude Opus 4.5
Input tokens$5.00
Output tokens$25.00
Best providerAnthropic
Baidu
ERNIE 5.5 Flash Preview
Input tokens$0.28
Output tokens$1.13
Best providerBaidu
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

ERNIE 5.5 Flash Preview accepts 1,048,576 input tokens compared to Claude Opus 4.5's 200,000 tokens. ERNIE 5.5 Flash Preview can generate longer responses up to 1,048,576 tokens, while Claude Opus 4.5 is limited to 64,000 tokens.

Anthropic
Claude Opus 4.5
Input200,000 tokens
Output64,000 tokens
Baidu
ERNIE 5.5 Flash Preview
Input1,048,576 tokens
Output1,048,576 tokens
Fri Nov 13 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

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

Claude Opus 4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Opus 4.5

Text
Images
Audio
Video

ERNIE 5.5 Flash Preview

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 4.5

Proprietary

Closed source

ERNIE 5.5 Flash Preview

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 4.5 was released on 2025-11-24, while ERNIE 5.5 Flash Preview was released on 2026-11-11.

ERNIE 5.5 Flash Preview is 12 months newer than Claude Opus 4.5.

Claude Opus 4.5

Nov 24, 2025

11 months ago

ERNIE 5.5 Flash Preview

Nov 11, 2026

1 days ago

11mo newer

Knowledge Cutoff

When training data ends

Claude Opus 4.5 has a documented knowledge cutoff of 2025-03-31, while ERNIE 5.5 Flash Preview's cutoff date is not specified.

We can confirm Claude Opus 4.5's training data extends to 2025-03-31, but cannot make a direct comparison without ERNIE 5.5 Flash Preview's cutoff date.

Claude Opus 4.5

Mar 2025

ERNIE 5.5 Flash Preview

—

Provider Availability

Claude Opus 4.5 is available from Anthropic. ERNIE 5.5 Flash Preview is available from Baidu Qianfan.

Claude Opus 4.5

anthropic logo
Anthropic
Input Price:Input: $5.00/1MOutput Price:Output: $25.00/1M

ERNIE 5.5 Flash Preview

baidu logo
Baidu
Input Price:Input: $0.28/1MOutput Price:Output: $1.13/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

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

Claude Opus 4.5
✓ Preferred
ERNIE 5.5 Flash Preview
Open in Playground

FAQ

Common questions about Claude Opus 4.5 vs ERNIE 5.5 Flash Preview.

Which is better, Claude Opus 4.5 or ERNIE 5.5 Flash Preview?

ERNIE 5.5 Flash Preview leads the LLM Stats Score 52.3 to 37.6. Claude Opus 4.5 is made by Anthropic and ERNIE 5.5 Flash Preview 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 4.5 compare to ERNIE 5.5 Flash Preview in benchmarks?

Claude Opus 4.5 scores Tau2 Telecom: 98.2%, MMMLU: 90.8%, Tau2 Retail: 88.9%, GPQA: 87.0%, SWE-Bench Verified: 80.9%. ERNIE 5.5 Flash Preview scores BrowseComp: 87.4%, DRACO: 84.9%, MCP Atlas: 84.6%, DeepSWE 1.1: 71.2%, OfficeQA Pro: 67.9%.

Is Claude Opus 4.5 cheaper than ERNIE 5.5 Flash Preview?

ERNIE 5.5 Flash Preview is 17.9x cheaper for input tokens. Claude Opus 4.5 costs $5.00/M input and $25.00/M output via anthropic. ERNIE 5.5 Flash Preview costs $0.28/M input and $1.13/M output via baidu.

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

Claude Opus 4.5 supports 200K tokens and ERNIE 5.5 Flash Preview supports 1.0M 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 4.5 and ERNIE 5.5 Flash Preview?

Key differences include LLM Stats Score (37.6 vs 52.3), context window (200K vs 1.0M), input pricing ($5.00 vs $0.28/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 4.5 and ERNIE 5.5 Flash Preview?

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

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