The AI arena is free today

Open Superagent

Claude 3 Sonnet vs LongCat-2.5

LongCat-2.5 leads the LLM Stats Score 50.0 to 1.2. LongCat-2.5 is 11.4x cheaper per token.

Anthropic · Meituan · Updated for 2026

Which is better?

LongCat-2.5 leads the overall LLM Stats Score 50.0 to 1.2, ranking #20 overall.

On price, LongCat-2.5 is roughly 11.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

LongCat-2.5 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 3 Sonnet

  • you want predictable pricing at $3.00/M input and $15.00/M output

Choose LongCat-2.5

  • overall performance matters — it scores 50.0 and ranks #20 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • cost matters — it's about 11.4x 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 3 Sonnet
Anthropic
LongCat-2.5
Meituan
Core performance indexes
LLM Stats Score
1.2
#359
50.0
#20
Reasoning
1.1
#350
48.3
#21
Coding
-1.5
#283
38.6
#27
Cost, coverage & limits
Benchmark wins
—
—
Input price
$3.00 / M
$0.30 / M
Output price
$15.00 / M
$1.20 / M
Context window
200,000
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude 3 Sonnet
LongCat-2.5
Math
7.3#286
37.2#37
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

11 reported for Claude 3 Sonnet · 23 for LongCat-2.5

No common benchmarks found

Claude 3 Sonnet and LongCat-2.5don'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

LongCat-2.5 costs less

For input processing, Claude 3 Sonnet ($3.00/1M tokens) is 10.0x more expensive than LongCat-2.5 ($0.30/1M tokens).

For output processing, Claude 3 Sonnet ($15.00/1M tokens) is 12.5x more expensive than LongCat-2.5 ($1.20/1M tokens).

In conclusion, Claude 3 Sonnet is more expensive than LongCat-2.5.*

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

Lowest available price from all providers
Mon Nov 02 2026 • llm-stats.com
Anthropic
Claude 3 Sonnet
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
Meituan
LongCat-2.5
Input tokens$0.30
Output tokens$1.20
Best providerMeituan
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

LongCat-2.5 accepts 1,048,576 input tokens compared to Claude 3 Sonnet's 200,000 tokens. Claude 3 Sonnet can generate longer responses up to 200,000 tokens, while LongCat-2.5 is limited to 131,072 tokens.

Anthropic
Claude 3 Sonnet
Input200,000 tokens
Output200,000 tokens
Meituan
LongCat-2.5
Input1,048,576 tokens
Output131,072 tokens
Mon Nov 02 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude 3 Sonnet and LongCat-2.5 support multimodal inputs.

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

Claude 3 Sonnet

Text
Images
Audio
Video

LongCat-2.5

Text
Images
Audio
Video

Release Timeline

When each model was launched

Claude 3 Sonnet was released on 2024-02-29, while LongCat-2.5 was released on 2026-11-01.

LongCat-2.5 is 33 months newer than Claude 3 Sonnet.

Claude 3 Sonnet

Feb 29, 2024

2.7 years ago

LongCat-2.5

Nov 1, 2026

0 days ago

2.7yr newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Claude 3 Sonnet is available from Anthropic, Bedrock, Google. LongCat-2.5 is available from Meituan.

Claude 3 Sonnet

anthropic logo
Anthropic
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
bedrock logo
AWS Bedrock
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
google logo
Google
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

LongCat-2.5

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

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude 3 Sonnet and LongCat-2.5 side-by-side, then vote on the output you prefer.

Claude 3 Sonnet
✓ Preferred
LongCat-2.5
Open in Playground

FAQ

Common questions about Claude 3 Sonnet vs LongCat-2.5.

Which is better, Claude 3 Sonnet or LongCat-2.5?

LongCat-2.5 leads the LLM Stats Score 50.0 to 1.2. Claude 3 Sonnet is made by Anthropic and LongCat-2.5 is made by Meituan. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude 3 Sonnet compare to LongCat-2.5 in benchmarks?

Claude 3 Sonnet scores ARC-C: 93.2%, GSM8k: 92.3%, HellaSwag: 89.0%, MGSM: 83.5%, BIG-Bench Hard: 82.9%. LongCat-2.5 scores MathVision: 96.5%, BrowseComp: 91.9%, CharXiv-R: 90.2%, Terminal-Bench 2.1: 88.4%, Video-MME: 85.2%.

Is Claude 3 Sonnet cheaper than LongCat-2.5?

LongCat-2.5 is 10.0x cheaper for input tokens. Claude 3 Sonnet costs $3.00/M input and $15.00/M output via anthropic. LongCat-2.5 costs $0.30/M input and $1.20/M output via meituan.

What are the context window sizes for Claude 3 Sonnet and LongCat-2.5?

Claude 3 Sonnet supports 200K tokens and LongCat-2.5 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 3 Sonnet and LongCat-2.5?

Key differences include LLM Stats Score (1.2 vs 50.0), context window (200K vs 1.0M), input pricing ($3.00 vs $0.30/M), licensing (Proprietary vs Unknown). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude 3 Sonnet and LongCat-2.5?

Claude 3 Sonnet is developed by Anthropic and LongCat-2.5 is developed by Meituan.

Related comparisons