DeepSeek V4.1 Flash 1017 Open vs 
Solar Pro 4 Paid
DeepSeek V4.1 Flash 1017 vs Solar Pro 4 compared — price per token, context window, multimodality, openness and which to choose. Can the open-source model replace the paid one? Full 2026 breakdown.
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
$0.6 /M outputNo per-token fees if you self-host
$0.6 /M outputManaged API (no infra to run)
DeepSeek V4.1 Flash 1017 vs Solar Pro 4 specs
| Spec | DeepSeek V4.1 Flash 1017 | Solar Pro 4 | Winner |
|---|---|---|---|
| Maker | DeepSeek | Upstage | – |
| Type | Open-weight | Proprietary | |
| Context window | 1M tokens | 524K tokens | |
| Input price | $0.15/M · free self-host | $0.15/M | = Tie |
| Output price | $0.6/M · free self-host | $0.6/M | = Tie |
| Vision / multimodal | Yes | No | |
| Tool / function calling | Yes | Yes | = Tie |
| Self-hostable | Yes | No (API only) | |
| License | MIT | Proprietary |
Price gap & when to choose each
- You want to self-host or run on your cloud
- You need the longer 1M context window
- You prioritize data privacy & control
- You want the lowest operating costs
- You are building open or reproducible AI
- You want frontier performance through a managed API
- You value reliability & ecosystem
- You don't want to manage infrastructure
Feature comparison
| Capability | DeepSeek V4.1 Flash 1017 | Solar Pro 4 |
|---|---|---|
| Open weights (downloadable) | ✓ | ✗ |
| Self-hostable | ✓ | ✗ |
| Runs fully offline | ✓ | ✗ |
| Vision / multimodal | ✓ | ✗ |
| Tool / function calling | ✓ | ✓ |
| 1M+ context window | ✓ | ✗ |
Benchmarks: DeepSeek V4.1 Flash 1017 vs Solar Pro 4
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
How DeepSeek V4.1 Flash 1017 and Solar Pro 4 score
| Criterion | DeepSeek V4.1 Flash 1017 | Solar Pro 4 |
|---|---|---|
| Cost-efficiency | 5.0 | 5.0 |
| Context window | 5.0 | 4.5 |
| Openness | 5.0 | 1.5 |
| Self-hosting | 5.0 | 1.0 |
| Multimodality | 5.0 | 3.5 |
Scores come from live data — output price (cost), context length, open vs closed weights (openness & self-hosting) and vision/tool support (multimodality). Raw task quality isn't scored here; it depends on your benchmark — see the verdict.
What each model is
DeepSeek V4.1 Flash 1017 Open
DeepSeek V4.1 Flash 1017 is the October 17, 2026 snapshot of DeepSeek V4.1 Flash, served by DeepSeek under the `deepseek-flash` API model name. V4.1 Flash is a sparse mixture-of-experts model...
Solar Pro 4 Paid
Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window. It is built for long-horizon tasks and agentic workflows, with strong capabilities in office productivity, document-intensive...
Other models in these families
These variants are tracked but not compared here — one page per family keeps the comparison readable.
Frequently asked questions
Is DeepSeek V4.1 Flash 1017 as good as Solar Pro 4?
DeepSeek V4.1 Flash 1017 is open-weight and competitive on many tasks, but Solar Pro 4 may still lead on the hardest reasoning and agentic work. The gap keeps narrowing — benchmark both on your actual use case before deciding.
Can I run DeepSeek V4.1 Flash 1017 locally?
Yes. DeepSeek V4.1 Flash 1017 has open weights, so you can self-host it on your own GPUs or run it via a low-cost API. Solar Pro 4 is API-only and cannot be self-hosted.
DeepSeek V4.1 Flash 1017 vs Solar Pro 4 — which should I pick in 2026?
Choose DeepSeek V4.1 Flash 1017 if you want to self-host, keep your data private and skip per-token fees — it's open-weight and runs on your own hardware. Choose Solar Pro 4 if you want frontier capability through a managed API with zero infrastructure to run.
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