Model Comparison

Claude Opus 4.5 vs LongCat-Flash-Thinking-2601

Claude Opus 4.5 shows notably better performance in the majority of benchmarks. LongCat-Flash-Thinking-2601 is 19.0x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

Claude Opus 4.5 outperforms in 3 benchmarks (GPQA, SWE-Bench Verified, Tau2 Retail), while LongCat-Flash-Thinking-2601 is better at 1 benchmark (Tau2 Telecom).

Claude Opus 4.5 shows notably better performance in the majority of benchmarks.

Wed Apr 15 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

LongCat-Flash-Thinking-2601 costs less

For input processing, Claude Opus 4.5 ($5.00/1M tokens) is 16.7x more expensive than LongCat-Flash-Thinking-2601 ($0.30/1M tokens).

For output processing, Claude Opus 4.5 ($25.00/1M tokens) is 20.8x more expensive than LongCat-Flash-Thinking-2601 ($1.20/1M tokens).

In conclusion, Claude Opus 4.5 is more expensive than LongCat-Flash-Thinking-2601.*

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

Lowest available price from all providers
Wed Apr 15 2026 • llm-stats.com
Anthropic
Claude Opus 4.5
Input tokens$5.00
Output tokens$25.00
Best providerAnthropic
Meituan
LongCat-Flash-Thinking-2601
Input tokens$0.30
Output tokens$1.20
Best providerMeituan
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude Opus 4.5 accepts 200,000 input tokens compared to LongCat-Flash-Thinking-2601's 128,000 tokens. LongCat-Flash-Thinking-2601 can generate longer responses up to 128,000 tokens, while Claude Opus 4.5 is limited to 64,000 tokens.

Anthropic
Claude Opus 4.5
Input200,000 tokens
Output64,000 tokens
Meituan
LongCat-Flash-Thinking-2601
Input128,000 tokens
Output128,000 tokens
Wed Apr 15 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude Opus 4.5 supports multimodal inputs, whereas LongCat-Flash-Thinking-2601 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

LongCat-Flash-Thinking-2601

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Opus 4.5 is licensed under a proprietary license, while LongCat-Flash-Thinking-2601 uses MIT.

License differences may affect how you can use these models in commercial or open-source projects.

Claude Opus 4.5

Proprietary

Closed source

LongCat-Flash-Thinking-2601

MIT

Open weights

Release Timeline

When each model was launched

Claude Opus 4.5 was released on 2025-11-24, while LongCat-Flash-Thinking-2601 was released on 2026-01-14.

LongCat-Flash-Thinking-2601 is 2 months newer than Claude Opus 4.5.

Claude Opus 4.5

Nov 24, 2025

4 months ago

LongCat-Flash-Thinking-2601

Jan 14, 2026

3 months ago

1mo newer

Knowledge Cutoff

When training data ends

Claude Opus 4.5 has a documented knowledge cutoff of 2025-03-31, while LongCat-Flash-Thinking-2601'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 LongCat-Flash-Thinking-2601's cutoff date.

Claude Opus 4.5

Mar 2025

LongCat-Flash-Thinking-2601

—

Provider Availability

Claude Opus 4.5 is available from Anthropic. LongCat-Flash-Thinking-2601 is available from Meituan.

Claude Opus 4.5

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

LongCat-Flash-Thinking-2601

meituan logo
Meituan
Input Price:Input: $0.30/1MOutput Price:Output: $1.20/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Anthropic
Larger context window (200,000 tokens)
Supports multimodal inputs
Higher GPQA score (87.0% vs 80.5%)
Higher SWE-Bench Verified score (80.9% vs 70.0%)
Higher Tau2 Retail score (88.9% vs 88.6%)
Meituan
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher Tau2 Telecom score (99.3% vs 98.2%)

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Opus 4.5
Meituan
LongCat-Flash-Thinking-2601

FAQ

Common questions about Claude Opus 4.5 vs LongCat-Flash-Thinking-2601

Claude Opus 4.5 shows notably better performance in the majority of benchmarks. Claude Opus 4.5 is made by Anthropic and LongCat-Flash-Thinking-2601 is made by Meituan. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
Claude Opus 4.5 scores Tau2 Telecom: 98.2%, MMMLU: 90.8%, Tau2 Retail: 88.9%, GPQA: 87.0%, SWE-Bench Verified: 80.9%. LongCat-Flash-Thinking-2601 scores AIME 2025: 99.6%, Tau2 Telecom: 99.3%, Tau2 Retail: 88.6%, LiveCodeBench: 82.8%, GPQA: 80.5%.
LongCat-Flash-Thinking-2601 is 16.7x cheaper for input tokens. Claude Opus 4.5 costs $5.00/M input and $25.00/M output via anthropic. LongCat-Flash-Thinking-2601 costs $0.30/M input and $1.20/M output via meituan.
Claude Opus 4.5 supports 200K tokens and LongCat-Flash-Thinking-2601 supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (200K vs 128K), input pricing ($5.00 vs $0.30/M), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.
Claude Opus 4.5 is developed by Anthropic and LongCat-Flash-Thinking-2601 is developed by Meituan.