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Qwen3.5-397B-A17B vs Solar Pro 4

Qwen3.5-397B-A17B and Solar Pro 4 are closely matched at 38.7 and 35.1 on the LLM Stats Score. Solar Pro 4 is 2.1x cheaper per token.

Alibaba Cloud / Qwen Team · Upstage · Updated for 2026

Which is better?

Qwen3.5-397B-A17B and Solar Pro 4 are closely matched on the overall LLM Stats Score at 38.7 and 35.1.

The models split the 6 individual benchmarks reported for both models evenly.

On price, Solar Pro 4 is roughly 2.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Solar Pro 4 also accepts a larger context window (524,288 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 Qwen3.5-397B-A17B

  • you need open weights you can self-host or fine-tune

Choose Solar Pro 4

  • cost matters — it's about 2.1x cheaper per token
  • you process long inputs — it offers a 524,288 token context window
  • you want the most recent training data — it shipped Aug 2026

At a glance

The differences that matter most.

Qwen3.5-397B-A17B
Alibaba Cloud / Qwen Team
Solar Pro 4
Upstage
Core performance indexes
LLM Stats Score
38.7
#70
35.1
#96
Reasoning
38.5
#69
34.7
#91
Coding
22.9
#86
21.0
#99
Agents
19.9
#70
11.5
#115
Cost, coverage & limits
Benchmark wins
3 of 6
3 of 6
Input price
$0.45 / M
$0.30 / M
Output price
$3.00 / M
$1.20 / M
Context window
262,144
524,288

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Qwen3.5-397B-A17B
Solar Pro 4
Math
36.6#38
32.3#61
Tool use
16.6#82
8.7#141
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

38 reported for Qwen3.5-397B-A17B · 9 for Solar Pro 4

6 shared

Qwen3.5-397B-A17B outperforms in 3 benchmarks (BrowseComp, MMLU-Pro, SWE-Bench Verified), while Solar Pro 4 is better at 3 benchmarks (AA-LCR, AIME 2026, GPQA).

Both models are evenly matched across the benchmarks.

Wed Oct 07 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Solar Pro 4 costs less

For input processing, Qwen3.5-397B-A17B ($0.45/1M tokens) is 1.5x more expensive than Solar Pro 4 ($0.30/1M tokens).

For output processing, Qwen3.5-397B-A17B ($3.00/1M tokens) is 2.5x more expensive than Solar Pro 4 ($1.20/1M tokens).

In conclusion, Qwen3.5-397B-A17B is more expensive than Solar Pro 4.*

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

Lowest available price from all providers
Wed Oct 07 2026 • llm-stats.com
Alibaba Cloud / Qwen Team
Qwen3.5-397B-A17B
Input tokens$0.45
Output tokens$3.00
Best providerDeepinfra
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

Solar Pro 4 accepts 524,288 input tokens compared to Qwen3.5-397B-A17B's 262,144 tokens. Qwen3.5-397B-A17B can generate longer responses up to 262,144 tokens, while Solar Pro 4 is limited to 131,072 tokens.

Alibaba Cloud / Qwen Team
Qwen3.5-397B-A17B
Input262,144 tokens
Output262,144 tokens
Upstage
Solar Pro 4
Input524,288 tokens
Output131,072 tokens
Wed Oct 07 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Qwen3.5-397B-A17B supports multimodal inputs, whereas Solar Pro 4 does not.

Qwen3.5-397B-A17B can handle both text and other forms of data like images, making it suitable for multimodal applications.

Qwen3.5-397B-A17B

Text
Images
Audio
Video

Solar Pro 4

Text
Images
Audio
Video

License

Usage and distribution terms

Qwen3.5-397B-A17B 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.

Qwen3.5-397B-A17B

Apache 2.0

Open weights

Solar Pro 4

Proprietary

Closed source

Release Timeline

When each model was launched

Qwen3.5-397B-A17B was released on 2026-02-16, while Solar Pro 4 was released on 2026-08-06.

Solar Pro 4 is 6 months newer than Qwen3.5-397B-A17B.

Qwen3.5-397B-A17B

Feb 16, 2026

7 months ago

Solar Pro 4

Aug 6, 2026

2 months ago

5mo 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

Qwen3.5-397B-A17B is available from DeepInfra, Novita. Solar Pro 4 is available from Upstage.

Qwen3.5-397B-A17B

deepinfra logo
Deepinfra
Input Price:Input: $0.45/1MOutput Price:Output: $3.00/1M
novita logo
Novita
Input Price:Input: $0.60/1MOutput Price:Output: $3.60/1M

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 Qwen3.5-397B-A17B and Solar Pro 4 side-by-side, then vote on the output you prefer.

Qwen3.5-397B-A17B
✓ Preferred
Solar Pro 4
Open in Playground

FAQ

Common questions about Qwen3.5-397B-A17B vs Solar Pro 4.

Which is better, Qwen3.5-397B-A17B or Solar Pro 4?

Qwen3.5-397B-A17B and Solar Pro 4 are closely matched on the LLM Stats Score at 38.7 and 35.1. Qwen3.5-397B-A17B is made by Alibaba Cloud / Qwen Team 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 Qwen3.5-397B-A17B compare to Solar Pro 4 in benchmarks?

Qwen3.5-397B-A17B scores MMLU-Redux: 94.9%, HMMT 2025: 94.8%, C-Eval: 93.0%, HMMT25: 92.7%, IFEval: 92.6%. Solar Pro 4 scores AIME 2026: 95.3%, GPQA: 89.0%, LiveCodeBench: 87.8%, MMLU-Pro: 86.3%, AA-LCR: 71.0%.

Is Qwen3.5-397B-A17B cheaper than Solar Pro 4?

Solar Pro 4 is 1.5x cheaper for input tokens. Qwen3.5-397B-A17B costs $0.45/M input and $3.00/M output via deepinfra. Solar Pro 4 costs $0.30/M input and $1.20/M output via upstage.

What are the context window sizes for Qwen3.5-397B-A17B and Solar Pro 4?

Qwen3.5-397B-A17B supports 262K 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 Qwen3.5-397B-A17B and Solar Pro 4?

Key differences include LLM Stats Score (38.7 vs 35.1), context window (262K vs 524K), input pricing ($0.45 vs $0.30/M), multimodal support (yes vs no), licensing (Apache 2.0 vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Qwen3.5-397B-A17B and Solar Pro 4?

Qwen3.5-397B-A17B is developed by Alibaba Cloud / Qwen Team and Solar Pro 4 is developed by Upstage.

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