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LongCat-2.5 vs Solar Pro 4

LongCat-2.5 leads the LLM Stats Score 50.0 to 34.0. LongCat-2.5 and Solar Pro 4 cost the same.

Meituan · Upstage · Updated for 2026

Which is better?

LongCat-2.5 leads the overall LLM Stats Score 50.0 to 34.0, ranking #20 overall.

In the 2 individual benchmarks reported for both models, LongCat-2.5 wins 2; this is a narrower head-to-head signal than the composite indexes.

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 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
  • you value its reported benchmark strengths — it wins 2 of 2 exact shared results
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Nov 2026

Choose Solar Pro 4

  • you want predictable pricing at $0.30/M input and $1.20/M output

At a glance

The differences that matter most.

LongCat-2.5
Meituan
Solar Pro 4
Upstage
Core performance indexes
LLM Stats Score
50.0
#20
34.0
#119
Reasoning
48.3
#21
33.6
#117
Coding
38.6
#27
20.5
#122
Agents
36.3
#23
10.7
#146
Cost, coverage & limits
Benchmark wins
2 of 2
0 of 2
Input price
$0.30 / M
$0.30 / M
Output price
$1.20 / M
$1.20 / M
Context window
1,048,576
524,288

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
LongCat-2.5
Solar Pro 4
Math
37.2#37
32.1#68
Tool use
30.2#15
9.1#161
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

23 reported for LongCat-2.5 · 9 for Solar Pro 4

2 shared

LongCat-2.5 outperforms in 2 benchmarks (BrowseComp, Terminal-Bench 2.1), while Solar Pro 4 is better at 0 benchmarks.

LongCat-2.5 significantly outperforms across most benchmarks.

Thu Nov 05 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

For input processing, LongCat-2.5 ($0.30/1M tokens) costs the same as Solar Pro 4 ($0.30/1M tokens).

For output processing, LongCat-2.5 ($1.20/1M tokens) costs the same as Solar Pro 4 ($1.20/1M tokens).

In conclusion, LongCat-2.5 and Solar Pro 4 cost the same.*

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

Lowest available price from all providers
Thu Nov 05 2026 • llm-stats.com
Meituan
LongCat-2.5
Input tokens$0.30
Output tokens$1.20
Best providerMeituan
Upstage
Solar Pro 4
Input tokens$0.30
Output tokens$1.20
Best providerUnknown Organization
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

LongCat-2.5 accepts 1,048,576 input tokens compared to Solar Pro 4's 524,288 tokens. Both models can generate responses up to 131,072 tokens.

Meituan
LongCat-2.5
Input1,048,576 tokens
Output131,072 tokens
Upstage
Solar Pro 4
Input524,288 tokens
Output131,072 tokens
Thu Nov 05 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

LongCat-2.5 supports multimodal inputs, whereas Solar Pro 4 does not.

LongCat-2.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

LongCat-2.5

Text
Images
Audio
Video

Solar Pro 4

Text
Images
Audio
Video

Release Timeline

When each model was launched

LongCat-2.5 was released on 2026-11-01, while Solar Pro 4 was released on 2026-08-06.

LongCat-2.5 is 3 months newer than Solar Pro 4.

LongCat-2.5

Nov 1, 2026

4 days ago

2mo newer
Solar Pro 4

Aug 6, 2026

3 months ago

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

LongCat-2.5 is available from Meituan. Solar Pro 4 is available from Upstage.

LongCat-2.5

meituan logo
Meituan
Input Price:Input: $0.30/1MOutput Price:Output: $1.20/1M

Solar Pro 4

upstage logo
Unknown Organization
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 LongCat-2.5 and Solar Pro 4 side-by-side, then vote on the output you prefer.

LongCat-2.5
✓ Preferred
Solar Pro 4
Open in Playground

FAQ

Common questions about LongCat-2.5 vs Solar Pro 4.

Which is better, LongCat-2.5 or Solar Pro 4?

LongCat-2.5 leads the LLM Stats Score 50.0 to 34.0. LongCat-2.5 is made by Meituan and Solar Pro 4 is made by Upstage. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does LongCat-2.5 compare to Solar Pro 4 in benchmarks?

LongCat-2.5 scores MathVision: 96.5%, BrowseComp: 91.9%, CharXiv-R: 90.2%, Terminal-Bench 2.1: 88.4%, Video-MME: 85.2%. Solar Pro 4 scores AIME 2026: 95.3%, GPQA: 89.0%, LiveCodeBench: 87.8%, MMLU-Pro: 86.3%, AA-LCR: 71.0%.

Is LongCat-2.5 cheaper than Solar Pro 4?

Both models cost $0.30 per million input tokens.

What are the context window sizes for LongCat-2.5 and Solar Pro 4?

LongCat-2.5 supports 1.0M tokens and Solar Pro 4 supports 524K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between LongCat-2.5 and Solar Pro 4?

Key differences include LLM Stats Score (50.0 vs 34.0), context window (1.0M vs 524K), multimodal support (yes vs no), licensing (Unknown vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes LongCat-2.5 and Solar Pro 4?

LongCat-2.5 is developed by Meituan and Solar Pro 4 is developed by Upstage.

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