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Van Data Team

text model comparison

LongCat-2.5 vs Solar Pro 4

LongCat-2.5 and Solar Pro 4 are both current text models, from Meituan and Upstage. Both cost $0.30 per 1M input tokens. LongCat-2.5 has the larger context window, 1,048,576 vs 512,000 tokens.

Longer context window
LongCat-2.51.05M tokens against 512K tokens
Newer release
LongCat-2.5Nov 2026 against Aug 2026

Data verified November 3, 2026 · Dataset 2026-11-03

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Side by side

LongCat-2.5 and Solar Pro 4, line by line

Prices in effect today, compared at the same tier wherever both list one. The better value in each row is highlighted.

FactLongCat-2.5Solar Pro 4
Price
Price per 1M input tokens$0.30$0.30
Price per 1M output tokens$1.20$1.20
Independent benchmarks
Arena TextNot measured1388 Elo (#47 of 51)
Arena WebDevNot measured1370 Elo (#43 of 45)
Specs
ProviderMeituanUpstage
Release dateNovember 2, 2026August 6, 2026
AccessAPI onlyAPI only
Context window1,048,576 tokens512,000 tokens
Max output262,144 tokens128,000 tokens
Inputtext, image, videotext
Outputtexttext

No independent benchmark has scored both models yet. Each rank counts the current models scored on that benchmark.

Scores:Arena · 2026-11-03

Charts

Against every current text model

Where LongCat-2.5 and Solar Pro 4 land among the current models of their task, on every independent benchmark, on price and on context.

Where each stands

Only Solar Pro 4 has a current Arena Text score: #47 of 51. Each bar is the share of current models it beats.

LongCat-2.5 and Solar Pro 4 among the current text models, one row per benchmark, price and context window.

Independent benchmarks

Arena Text

LongCat-2.5: Not scored

Solar Pro 4:#47of 51

1,388 Elo · ahead of 8%

Arena WebDev

LongCat-2.5: Not scored

Solar Pro 4:#43of 45

1,370 Elo · ahead of 5%

Price and context

Price per 1M input tokens

LongCat-2.5:#11of 52

$0.30 · cheaper than 75%

Solar Pro 4:#11of 52

$0.30 · cheaper than 75%

Price per 1M output tokens

LongCat-2.5:#10of 52

$1.20 · cheaper than 76%

Solar Pro 4:#10of 52

$1.20 · cheaper than 76%

Context window

LongCat-2.5:#11of 64

1.05M tokens · longer than 67%

Solar Pro 4:#51of 64

512K tokens · longer than 21%

Scores fromArena · 2026-11-03

Quality against price

Arena Text · measured October 28, 2026

Solar Pro 4 scores 1,388 at $0.525 (blended price per 1M tokens). The line joins the current models no other beats on both price and Arena Text score; hover any point to name it.

Quality against priceArena Text score against price for 43 text models, LongCat-2.5 and Solar Pro 4 marked.1,2501,3001,3501,4001,4501,5001,550$0.30$1$3$10MOST ATTRACTIVE QUADRANTMedian price $3Median 1,475Blended price per 1M tokens (3 input : 1 output), log scaleArena Text (Elo)Solar Pro 4
Quality against price: the data
Arena Text score against price for 43 text models, LongCat-2.5 and Solar Pro 4 marked.
ModelProviderBlended price per 1M tokensArena Text (Elo)
Gemini 4 ArgonGoogle$41,520
Claude Opus 5.5Anthropic$81,509
Muse WonderMeta$81,507
Claude Fable 5Anthropic$201,504
Claude Fable 5.1Anthropic$201,504
Gemini 3.8 FlashGoogle$1.501,496
Muse Spark 1.3Meta$21,495
Claude Opus 5Anthropic$101,492
Kimi K3Moonshot Kimi$61,488
GPT-5.6 SolOpenAI$81,485
Gemini 3.6 FlashGoogle$31,483
GPT-5.5OpenAI$111,482
Claude Opus 4.8Anthropic$101,482
Qwen3.8-MaxAlibaba Qwen$31,482
GPT-6.1 SolOpenAI$41,481
GLM-5.3Z.ai$2.151,481
MiMo-V2.6-ProXiaomi MiMo$0.541,480
Claude Sonnet 5.5Anthropic$41,477
GLM-5.3-FlashZ.ai$0.241,477
GPT-6 AstraOpenAI$201,476
DeepSeek-V4.1-FlashDeepSeek$0.521,476
GPT-5.4OpenAI$5.631,475
Gemini 3 Flash PreviewGoogle$1.131,473
Grok 4.20xAI$1.561,472
GPT-5.6 TerraOpenAI$4.501,467
Grok 4.5xAI$31,465
DeepSeek-V4-ProDeepSeek$1.981,465
Claude Sonnet 5Anthropic$41,462
GPT-6 SolOpenAI$41,458
Gemini 3.5 Flash-LiteGoogle$0.851,456
Grok 4.6xAI$31,455
GPT-5.6 LunaOpenAI$0.451,453
MiMo-V2.6-FlashXiaomi MiMo$0.181,448
Step 5 PreviewStepFun$1.431,448
Grok 4.3xAI$1.561,442
GPT-6 LunaOpenAI$0.201,441
Grok 4.7xAI$31,441
Mistral Large 4Mistral AI$1.051,432
Claude Haiku 5.5Anthropic$0.201,425
GPT-4.1OpenAI$3.501,415
Solar Pro 4Upstage$0.521,388
GPT-4.1 miniOpenAI$0.701,383
GPT-4.1 nanoOpenAI$0.181,322

Cost

What each costs

Example workloads at each provider's listed rates, then every other rate either one lists. The cheaper figure in each row is highlighted.

The same work, priced

At each provider's listed rates.

What LongCat-2.5 and Solar Pro 4 cost for the same work, at the rates each provider lists.

  • 10M input and 2M output tokens

    The same price

    LongCat-2.5
    $5.40
    Solar Pro 4
    $5.40

  • The same, with 9M of the input tokens cached

    Solar Pro 4 costs 1.2× as much

    LongCat-2.5
    $2.75
    Solar Pro 4
    $3.24
Workload or rateLongCat-2.5Solar Pro 4
Example workloads
10M input and 2M output tokens$5.40$5.40
The same, with 9M of the input tokens cached$2.75 (better)$3.24
Other listed rates
1M input tokens, cached$0.006 (better)$0.06

Your own bill will differ. These figures use list prices and example workloads. The AI Model Cost Audit reviews your real usage, shortlists models that score as well for each task for less, and estimates the savings.

Launch price $100, regular price $150

Book the cost audit

Verdict

When to choose each

LongCat-2.5

Where it leads

  • Larger context window 1,048,576 vs 512,000 tokens
  • Longer responses, up to 262,144 vs 128,000 output tokens
  • Accepts image and video input
  • Cheaper cached input, $0.006 vs $0.06 per 1M tokens

Best for

  • Coding agents working through whole projects in Claude Code, Codex or similar harnesses
  • Visual coding and design work that mixes screenshots or screen recordings with code

Watch out for

  • The recorded rates are a limited-time discount: Meituan publishes no list price and no end date
  • API only: no weights had been published when this record was made
  • Released on 2 November 2026, so no independent benchmark score is recorded here yet
Full LongCat-2.5 profile

Solar Pro 4

Where it leads

No measured lead over LongCat-2.5 in this data.

Best for

  • Korean and Japanese enterprise workloads
  • Multi-step agent work with tool calls

Watch out for

  • A closed model: Upstage does not disclose its parameter count
  • Several of its published benchmark figures are in-house evaluations
Full Solar Pro 4 profile

From benchmark to production

Building on LongCat-2.5 or Solar Pro 4?

Public scores rarely hold on your own data. We test both models on your real tasks, then build the agent or pipeline around the one that wins.

AI Model Cost AuditLaunch price $100, regular price $150What the audit includes

Book the cost auditAI agent development

FAQ

LongCat-2.5 vs Solar Pro 4 FAQ

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

Both cost $0.30 per 1M input tokens. For 10M input and 2M output tokens, LongCat-2.5 costs $5.40 and Solar Pro 4 $5.40 at standard rates.

Which is cheaper with prompt caching, LongCat-2.5 or Solar Pro 4?

LongCat-2.5 charges $0.006 per 1M cached input tokens, 98% below its standard input rate, and Solar Pro 4 $0.06, 80% below. With 9M of 10M input tokens cached and 2M output tokens, LongCat-2.5 costs $2.75 and Solar Pro 4 $3.24.

Which has the larger context window, LongCat-2.5 or Solar Pro 4?

LongCat-2.5 has the larger context window, 1,048,576 vs 512,000 tokens. LongCat-2.5 returns up to 262,144 tokens per response, Solar Pro 4 128,000.

How do LongCat-2.5 and Solar Pro 4 differ in features?

LongCat-2.5 takes text, image and video input; Solar Pro 4 takes text.

Further reading

More on LongCat-2.5 and Solar Pro 4

Related comparisons

Production evaluation

Choosing between LongCat-2.5 and Solar Pro 4?

Public benchmarks narrow the shortlist. We run both on your own tasks, data and cost limits, then build the routing and review controls to run the winner in production.

  • A head-to-head evaluation on your real workload
  • Routing between models by cost and difficulty
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