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Claude Opus 4.1 vs EXAONE 4.5 33B

Claude Opus 4.1 and EXAONE 4.5 33B are closely matched at 29.8 and 25.9 on the LLM Stats Score.

Anthropic · LG AI Research · Updated for 2026

Which is better?

Claude Opus 4.1 and EXAONE 4.5 33B are closely matched on the overall LLM Stats Score at 29.8 and 25.9.

The models split the 2 individual benchmarks reported for both models evenly.

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

Choose Claude Opus 4.1

  • you want predictable pricing at $15.00/M input and $75.00/M output

Choose EXAONE 4.5 33B

  • you want the most recent training data — it shipped Apr 2026

At a glance

The differences that matter most.

Claude Opus 4.1
Anthropic
EXAONE 4.5 33B
LG AI Research
Core performance indexes
LLM Stats Score
29.8
#138
25.9
#168
Reasoning
29.9
#134
26.5
#161
Cost, coverage & limits
Benchmark wins
1 of 2
1 of 2
Input price
$15.00 / M
— / M
Output price
$75.00 / M
— / M
Context window
200,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
Claude Opus 4.1
EXAONE 4.5 33B
Math
22.6#140
28.4#95
Tool use
18.3#75
10.3#135
Writing
19.2#25
14.8#46
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

8 reported for Claude Opus 4.1 · 15 for EXAONE 4.5 33B

2 shared

Claude Opus 4.1 outperforms in 1 benchmarks (GPQA), while EXAONE 4.5 33B is better at 1 benchmark (AIME 2025).

Both models are evenly matched across the benchmarks.

Fri Oct 09 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Claude Opus 4.1 specifies input context (200,000 tokens). Only Claude Opus 4.1 specifies output context (32,000 tokens).

Anthropic
Claude Opus 4.1
Input200,000 tokens
Output32,000 tokens
LG AI Research
EXAONE 4.5 33B
Input- tokens
Output- tokens
Fri Oct 09 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Opus 4.1 and EXAONE 4.5 33B support multimodal inputs.

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

Claude Opus 4.1

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 4.1

Proprietary

Closed source

EXAONE 4.5 33B

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 4.1 was released on 2025-08-05, while EXAONE 4.5 33B was released on 2026-04-09.

EXAONE 4.5 33B is 8 months newer than Claude Opus 4.1.

Claude Opus 4.1

Aug 5, 2025

1.2 years ago

EXAONE 4.5 33B

Apr 9, 2026

6 months ago

8mo newer

Knowledge Cutoff

When training data ends

EXAONE 4.5 33B has a documented knowledge cutoff of 2024-12-01, while Claude Opus 4.1's cutoff date is not specified.

We can confirm EXAONE 4.5 33B's training data extends to 2024-12-01, but cannot make a direct comparison without Claude Opus 4.1's cutoff date.

Claude Opus 4.1

—

EXAONE 4.5 33B

Dec 2024

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Opus 4.1 and EXAONE 4.5 33B side-by-side, then vote on the output you prefer.

Claude Opus 4.1
✓ Preferred
EXAONE 4.5 33B
Open in Playground

FAQ

Common questions about Claude Opus 4.1 vs EXAONE 4.5 33B.

Which is better, Claude Opus 4.1 or EXAONE 4.5 33B?

Claude Opus 4.1 and EXAONE 4.5 33B are closely matched on the LLM Stats Score at 29.8 and 25.9. Claude Opus 4.1 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 4.1 compare to EXAONE 4.5 33B in benchmarks?

Claude Opus 4.1 scores MMMLU: 89.5%, TAU-bench Retail: 82.4%, GPQA: 80.9%, AIME 2025: 78.0%, MMMU (validation): 77.1%. 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 4.1 and EXAONE 4.5 33B?

Claude Opus 4.1 supports 200K 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 4.1 and EXAONE 4.5 33B?

Key differences include LLM Stats Score (29.8 vs 25.9). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 4.1 and EXAONE 4.5 33B?

Claude Opus 4.1 is developed by Anthropic and EXAONE 4.5 33B is developed by LG AI Research.

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