DeepSeek-V4-Flash-0423 vs Solar Pro 4
DeepSeek-V4-Flash-0423 and Solar Pro 4 are closely matched at 36.1 and 35.1 on the LLM Stats Score. DeepSeek-V4-Flash-0423 is 4.7x cheaper per token.
DeepSeek · Upstage · Updated for 2026
Which is better?
DeepSeek-V4-Flash-0423 and Solar Pro 4 are closely matched on the overall LLM Stats Score at 36.1 and 35.1.
In the 5 individual benchmarks reported for both models, DeepSeek-V4-Flash-0423 wins 4; this is a narrower head-to-head signal than the composite indexes.
On price, DeepSeek-V4-Flash-0423 is roughly 4.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
DeepSeek-V4-Flash-0423 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-Flash-0423
- you value its reported benchmark strengths — it wins 4 of 5 exact shared results
- cost matters — it's about 4.7x cheaper per token
- you process long inputs — it offers a 1,048,576 token context window
- you need open weights you can self-host or fine-tune
Choose Solar Pro 4
- you want the most recent training data — it shipped Aug 2026
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
19 reported for DeepSeek-V4-Flash-0423 · 9 for Solar Pro 4
DeepSeek-V4-Flash-0423 outperforms in 4 benchmarks (BrowseComp, LiveCodeBench, MMLU-Pro, SWE-Bench Verified), while Solar Pro 4 is better at 1 benchmark (GPQA).
DeepSeek-V4-Flash-0423 significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, DeepSeek-V4-Flash-0423 ($0.09/1M tokens) is 3.3x cheaper than Solar Pro 4 ($0.30/1M tokens).
For output processing, DeepSeek-V4-Flash-0423 ($0.18/1M tokens) is 6.7x cheaper than Solar Pro 4 ($1.20/1M tokens).
In conclusion, Solar Pro 4 is more expensive than DeepSeek-V4-Flash-0423.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
DeepSeek-V4-Flash-0423 accepts 1,048,576 input tokens compared to Solar Pro 4's 524,288 tokens. DeepSeek-V4-Flash-0423 can generate longer responses up to 1,048,576 tokens, while Solar Pro 4 is limited to 131,072 tokens.
License
Usage and distribution terms
DeepSeek-V4-Flash-0423 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.
MIT
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
DeepSeek-V4-Flash-0423 was released on 2026-04-23, while Solar Pro 4 was released on 2026-08-06.
Solar Pro 4 is 4 months newer than DeepSeek-V4-Flash-0423.
Apr 23, 2026
5 months ago
Aug 6, 2026
1 months ago
3mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
DeepSeek-V4-Flash-0423 is available from DeepInfra, Novita. Solar Pro 4 is available from Upstage.
DeepSeek-V4-Flash-0423
Solar Pro 4
Outputs Comparison
Judge for yourself.
Run your own prompts against DeepSeek-V4-Flash-0423 and Solar Pro 4 side-by-side, then vote on the output you prefer.
FAQ
Common questions about DeepSeek-V4-Flash-0423 vs Solar Pro 4.