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DeepSeek-V4.1-Flash-1017 vs Solar Pro 4

DeepSeek-V4.1-Flash-1017 leads the LLM Stats Score 51.0 to 35.0. DeepSeek-V4.1-Flash-1017 and Solar Pro 4 cost the same.

DeepSeek · Upstage · Updated for 2026

Which is better?

DeepSeek-V4.1-Flash-1017 leads the overall LLM Stats Score 51.0 to 35.0, ranking #15 overall.

DeepSeek-V4.1-Flash-1017 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 DeepSeek-V4.1-Flash-1017

  • overall performance matters — it scores 51.0 and ranks #15 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Oct 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.

DeepSeek-V4.1-Flash-1017
DeepSeek
Solar Pro 4
Upstage
Core performance indexes
LLM Stats Score
51.0
#15
35.0
#107
Reasoning
48.6
#18
34.7
#102
Coding
39.1
#15
20.6
#112
Agents
38.6
#9
12.0
#128
Cost, coverage & limits
Benchmark wins
—
—
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
DeepSeek-V4.1-Flash-1017
Solar Pro 4
Math
31.8#67
32.4#63
Tool use
30.9#7
9.6#149
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

11 reported for DeepSeek-V4.1-Flash-1017 · 9 for Solar Pro 4

No common benchmarks found

DeepSeek-V4.1-Flash-1017 and Solar Pro 4don'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

For input processing, DeepSeek-V4.1-Flash-1017 ($0.30/1M tokens) costs the same as Solar Pro 4 ($0.30/1M tokens).

For output processing, DeepSeek-V4.1-Flash-1017 ($1.20/1M tokens) costs the same as Solar Pro 4 ($1.20/1M tokens).

In conclusion, DeepSeek-V4.1-Flash-1017 and Solar Pro 4 cost the same.*

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

Lowest available price from all providers
Mon Oct 19 2026 • llm-stats.com
DeepSeek
DeepSeek-V4.1-Flash-1017
Input tokens$0.30
Output tokens$1.20
Best providerDeepSeek
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

DeepSeek-V4.1-Flash-1017 accepts 1,048,576 input tokens compared to Solar Pro 4's 524,288 tokens. DeepSeek-V4.1-Flash-1017 can generate longer responses up to 393,216 tokens, while Solar Pro 4 is limited to 131,072 tokens.

DeepSeek
DeepSeek-V4.1-Flash-1017
Input1,048,576 tokens
Output393,216 tokens
Upstage
Solar Pro 4
Input524,288 tokens
Output131,072 tokens
Mon Oct 19 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

DeepSeek-V4.1-Flash-1017 supports multimodal inputs, whereas Solar Pro 4 does not.

DeepSeek-V4.1-Flash-1017 can handle both text and other forms of data like images, making it suitable for multimodal applications.

DeepSeek-V4.1-Flash-1017

Text
Images
Audio
Video

Solar Pro 4

Text
Images
Audio
Video

License

Usage and distribution terms

DeepSeek-V4.1-Flash-1017 is licensed under MIT, while Solar Pro 4 uses a proprietary license.

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

DeepSeek-V4.1-Flash-1017

MIT

Open weights

Solar Pro 4

Proprietary

Closed source

Release Timeline

When each model was launched

DeepSeek-V4.1-Flash-1017 was released on 2026-10-17, while Solar Pro 4 was released on 2026-08-06.

DeepSeek-V4.1-Flash-1017 is 2 months newer than Solar Pro 4.

DeepSeek-V4.1-Flash-1017

Oct 17, 2026

2 days ago

2mo newer
Solar Pro 4

Aug 6, 2026

2 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

DeepSeek-V4.1-Flash-1017 is available from DeepSeek. Solar Pro 4 is available from Upstage.

DeepSeek-V4.1-Flash-1017

deepseek logo
DeepSeek
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 DeepSeek-V4.1-Flash-1017 and Solar Pro 4 side-by-side, then vote on the output you prefer.

DeepSeek-V4.1-Flash-1017
✓ Preferred
Solar Pro 4
Open in Playground

FAQ

Common questions about DeepSeek-V4.1-Flash-1017 vs Solar Pro 4.

Which is better, DeepSeek-V4.1-Flash-1017 or Solar Pro 4?

DeepSeek-V4.1-Flash-1017 leads the LLM Stats Score 51.0 to 35.0. DeepSeek-V4.1-Flash-1017 is made by DeepSeek 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 DeepSeek-V4.1-Flash-1017 compare to Solar Pro 4 in benchmarks?

DeepSeek-V4.1-Flash-1017 scores BabyVision: 92.5%, Chartography: 83.0%, DeepSWE 1.1: 77.0%, NL2Repo: 68.2%, AutomationBench: 60.5%. Solar Pro 4 scores AIME 2026: 95.3%, GPQA: 89.0%, LiveCodeBench: 87.8%, MMLU-Pro: 86.3%, AA-LCR: 71.0%.

Is DeepSeek-V4.1-Flash-1017 cheaper than Solar Pro 4?

Both models cost $0.30 per million input tokens.

What are the context window sizes for DeepSeek-V4.1-Flash-1017 and Solar Pro 4?

DeepSeek-V4.1-Flash-1017 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 DeepSeek-V4.1-Flash-1017 and Solar Pro 4?

Key differences include LLM Stats Score (51.0 vs 35.0), context window (1.0M vs 524K), multimodal support (yes vs no), licensing (MIT vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes DeepSeek-V4.1-Flash-1017 and Solar Pro 4?

DeepSeek-V4.1-Flash-1017 is developed by DeepSeek and Solar Pro 4 is developed by Upstage.

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