The AI arena is free today

Open Superagent

Hy4 preview vs Solar Pro 4

Hy4 preview leads the LLM Stats Score 51.1 to 35.8.

Tencent · Upstage · Updated for 2026

Which is better?

Hy4 preview leads the overall LLM Stats Score 51.1 to 35.8, ranking #14 overall.

In the 2 individual benchmarks reported for both models, Hy4 preview wins 2; this is a narrower head-to-head signal than the composite indexes.

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

Choose Hy4 preview

  • overall performance matters — it scores 51.1 and ranks #14 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 want the most recent training data — it shipped Aug 2026
  • you need open weights you can self-host or fine-tune

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.

Hy4 preview
Tencent
Solar Pro 4
Upstage
Core performance indexes
LLM Stats Score
51.1
#14
35.8
#77
Reasoning
50.7
#11
35.4
#77
Coding
39.8
#12
21.5
#83
Agents
36.3
#14
12.5
#92
Cost, coverage & limits
Benchmark wins
2 of 2
0 of 2
Input price
— / M
$0.30 / M
Output price
— / M
$1.20 / M
Context window
—
524,288

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Hy4 preview
Solar Pro 4
Math
39.4#17
32.2#58
Tool use
31.1#10
13.1#91
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

32 reported for Hy4 preview · 9 for Solar Pro 4

2 shared

Hy4 preview outperforms in 2 benchmarks (GPQA, Terminal-Bench 2.1), while Solar Pro 4 is better at 0 benchmarks.

Hy4 preview significantly outperforms across most benchmarks.

Sat Sep 05 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Solar Pro 4 specifies input context (524,288 tokens). Only Solar Pro 4 specifies output context (131,072 tokens).

Tencent
Hy4 preview
Input- tokens
Output- tokens
Upstage
Solar Pro 4
Input524,288 tokens
Output131,072 tokens
Sat Sep 05 2026 • llm-stats.com

License

Usage and distribution terms

Hy4 preview is licensed under Apache 2.0, while Solar Pro 4 uses a proprietary license.

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

Hy4 preview

Apache 2.0

Open weights

Solar Pro 4

Proprietary

Closed source

Release Timeline

When each model was launched

Hy4 preview was released on 2026-08-28, while Solar Pro 4 was released on 2026-08-06.

Hy4 preview is 1 month newer than Solar Pro 4.

Hy4 preview

Aug 28, 2026

1 weeks ago

3w newer
Solar Pro 4

Aug 6, 2026

1 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

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Hy4 preview and Solar Pro 4 side-by-side, then vote on the output you prefer.

Hy4 preview
✓ Preferred
Solar Pro 4
Open in Playground

FAQ

Common questions about Hy4 preview vs Solar Pro 4.

Which is better, Hy4 preview or Solar Pro 4?

Hy4 preview leads the LLM Stats Score 51.1 to 35.8. Hy4 preview is made by Tencent 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 Hy4 preview compare to Solar Pro 4 in benchmarks?

Hy4 preview scores GPQA: 92.3%, Terminal-Bench 2.1: 85.4%, WideSearch: 83.9%, MCP Atlas: 83.7%, SWE-bench Multilingual: 82.9%. Solar Pro 4 scores AIME 2026: 95.3%, GPQA: 89.0%, LiveCodeBench: 87.8%, MMLU-Pro: 86.3%, AA-LCR: 71.0%.

What are the context window sizes for Hy4 preview and Solar Pro 4?

Hy4 preview supports an unknown number of 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 Hy4 preview and Solar Pro 4?

Key differences include LLM Stats Score (51.1 vs 35.8), licensing (Apache 2.0 vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Hy4 preview and Solar Pro 4?

Hy4 preview is developed by Tencent and Solar Pro 4 is developed by Upstage.

Related comparisons