DeepSeek-V4.1-Flash vs DeepSeek-V4-Flash-0731: Specs & Benchmark Comparison
DeepSeek-V4.1-Flash and DeepSeek-V4-Flash-0731 both come from DeepSeek, DeepSeek-V4-Flash-0731 was released in July 2026, and DeepSeek-V4.1-Flash followed 2 months later in September 2026. DeepSeek-V4.1-Flash is the larger model at roughly 552 billion parameters, against 304 billion for DeepSeek-V4-Flash-0731.
The two models share 5 published benchmarks. DeepSeek-V4.1-Flash leads on 5 of them. The widest gaps are on AutomationBench, where DeepSeek-V4.1-Flash scores 54.8% against 25.1%; CyberGym, where DeepSeek-V4.1-Flash scores 88.1% against 77.0%. Averaged across everything we track, DeepSeek-V4.1-Flash sits at 60.9% and DeepSeek-V4-Flash-0731 at 57.5%.
DeepSeek-V4-Flash-0731 is the cheaper API at $0.14 per million input tokens and $0.28 per million output tokens, roughly 2 times cheaper than DeepSeek-V4.1-Flash at $0.30 and $1.20. Both accept a context window of about 1M tokens. DeepSeek-V4.1-Flash accepts text and images as input, while DeepSeek-V4-Flash-0731 accepts text.
| Characteristic | DeepSeek-V4.1-Flash | DeepSeek-V4-Flash-0731 |
|---|---|---|
| Company | DeepSeek | DeepSeek |
| Release Date | September 10, 2026 | July 31, 2026 |
| Parameters | 552B | 304B |
| Multimodal | Yes | No |
| Context (input) | 1.0M | 1.0M |
| Context (output) | 393K | 393K |
| Input Price / 1M | $0.30 | $0.14 |
| Output Price / 1M | $1.20 | $0.28 |
| Average Score | 60.9% | 57.5% |
| Benchmarks | ||
| AutomationBench | 54.8% | 25.1% |
| CyberGym | 88.1% | 77.0% |
| NL2Repo | 64.0% | 54.2% |
| Terminal-Bench 2.1 | 90.6% | 83.0% |
| Agents' Last Exam | 31.8% | 25.2% |
Visual Benchmark Comparison
Verdict
DeepSeek-V4.1-Flash leads in 2 out of 4 comparison categories.
Both models show comparable average scores: DeepSeek-V4.1-Flash — 0.6, DeepSeek-V4-Flash-0731 — 0.6.
DeepSeek-V4-Flash-0731 is 3.6x cheaper: input $0.14/1M vs $0.30/1M tokens.
DeepSeek-V4.1-Flash supports a larger context: 1M vs 1M tokens.
DeepSeek-V4.1-Flash is newer: released 9/10/2026 vs 7/31/2026.
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Frequently Asked Questions
Which is better for coding — DeepSeek-V4.1-Flash or DeepSeek-V4-Flash-0731?
Which model is cheaper — DeepSeek-V4.1-Flash or DeepSeek-V4-Flash-0731?
Which has a larger context window — DeepSeek-V4.1-Flash or DeepSeek-V4-Flash-0731?
The DeepSeek-V4.1-Flash and DeepSeek-V4-Flash-0731 comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the DeepSeek-V4.1-Flash or DeepSeek-V4-Flash-0731 page. See also the complete list of AI model comparisons.