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Claude Opus 5.5 vs EXAONE 4.5 33B

Claude Opus 5.5 leads the LLM Stats Score 60.4 to 25.5.

Anthropic · LG AI Research · Updated for 2026

Which is better?

Claude Opus 5.5 leads the overall LLM Stats Score 60.4 to 25.5, ranking #1 overall.

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

Choose Claude Opus 5.5

  • overall performance matters — it scores 60.4 and ranks #1 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose EXAONE 4.5 33B

  • you are already invested in the LG AI Research ecosystem

At a glance

The differences that matter most.

Claude Opus 5.5
Anthropic
EXAONE 4.5 33B
LG AI Research
Core performance indexes
LLM Stats Score
60.4
#1
25.5
#177
Reasoning
59.5
#1
26.1
#172
Cost, coverage & limits
Benchmark wins
—
—
Input price
$4.00 / M
— / M
Output price
$20.00 / M
— / M
Context window
1,000,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

4 shared
Index
Claude Opus 5.5
EXAONE 4.5 33B
Math
41.8#6
28.3#101
Vision
41.6#1
13.3#114
Tool use
34.3#3
9.8#147
Multimodal
41.2#1
16.1#100
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

31 reported for Claude Opus 5.5 · 15 for EXAONE 4.5 33B

No common benchmarks found

Claude Opus 5.5 and EXAONE 4.5 33Bdon'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 Opus 5.5 specifies input context (1,000,000 tokens). Only Claude Opus 5.5 specifies output context (128,000 tokens).

Anthropic
Claude Opus 5.5
Input1,000,000 tokens
Output128,000 tokens
LG AI Research
EXAONE 4.5 33B
Input- tokens
Output- tokens
Fri Oct 23 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Opus 5.5 and EXAONE 4.5 33B support multimodal inputs.

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

Claude Opus 5.5

Text
Images
Audio
Video

EXAONE 4.5 33B

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

EXAONE 4.5 33B

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 5.5 was released on 2026-09-22, while EXAONE 4.5 33B was released on 2026-04-09.

Claude Opus 5.5 is 6 months newer than EXAONE 4.5 33B.

Claude Opus 5.5

Sep 22, 2026

4 weeks ago

5mo newer
EXAONE 4.5 33B

Apr 9, 2026

6 months ago

Knowledge Cutoff

When training data ends

Claude Opus 5.5 has a knowledge cutoff of 2026-06-01, while EXAONE 4.5 33B has a cutoff of 2024-12-01.

Claude Opus 5.5 has more recent training data (up to 2026-06-01), making it potentially better informed about events through that date compared to EXAONE 4.5 33B (2024-12-01).

Claude Opus 5.5

Jun 2026

1.5 yr newer
EXAONE 4.5 33B

Dec 2024

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Opus 5.5 and EXAONE 4.5 33B side-by-side, then vote on the output you prefer.

Claude Opus 5.5
✓ Preferred
EXAONE 4.5 33B
Open in Playground

FAQ

Common questions about Claude Opus 5.5 vs EXAONE 4.5 33B.

Which is better, Claude Opus 5.5 or EXAONE 4.5 33B?

Claude Opus 5.5 leads the LLM Stats Score 60.4 to 25.5. Claude Opus 5.5 is made by Anthropic and EXAONE 4.5 33B is made by LG AI Research. 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 EXAONE 4.5 33B 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%. EXAONE 4.5 33B scores AIME 2025: 92.9%, AIME 2026: 92.6%, IFEval: 89.6%, AI2D: 89.0%, MathVista-Mini: 85.0%.

What are the context window sizes for Claude Opus 5.5 and EXAONE 4.5 33B?

Claude Opus 5.5 supports 1.0M tokens and EXAONE 4.5 33B 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 Opus 5.5 and EXAONE 4.5 33B?

Key differences include LLM Stats Score (60.4 vs 25.5). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 5.5 and EXAONE 4.5 33B?

Claude Opus 5.5 is developed by Anthropic and EXAONE 4.5 33B is developed by LG AI Research.

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