vs
1:0
overall capability wins (2 ties across 3 scored). DeepSeek V4.1 Flash leads overall.
- Pricing3:0
- Specs1:0
Verdict
DeepSeek V4.1 Flash ships open weights (MIT); DeepSeek V4.1 Flash is ~1.3x cheaper on a blended token basis than DeepSeek V4 Flash Vision Exp.
- DeepSeek V4.1 Flash ships open weights (MIT)
- DeepSeek V4.1 Flash is ~1.3x cheaper on a blended token basis than DeepSeek V4 Flash Vision Exp
Cost for 1M in + 250K out
Illustrative chat workload at primary-provider list prices.
- DeepSeek V4.1 Flash
- $0.60
- DeepSeek V4 Flash Vision Exp
- $0.77
DeepSeek V4.1 Flash is about 1.3x cheaper on this workload.
Price per 1M tokens
Full comparison
Organization
DeepSeek
DeepSeek
Family
DeepSeek
DeepSeek
License
MIT
Proprietary
Open weights
Yes
No
Release
Sep 10, 2026
Aug 21, 2026
Knowledge cutoff
-
-
API / provider
DeepSeek
DeepSeek
Modalities
text, image → text
text, image → text
Specs
Context window
1M
1M
Max output
384K
384K
Parameters
552B (16B act.)
304B
Pricing
Input $/1M
$0.30
$0.44
Output $/1M
$1.20
$1.32
Blended $/1M (3∶1)
$0.52
$0.66
Speed
tok/s
-
-
TTFT (s)
-
-
Reasoning
MMLU-Pro
—
—
GPQA Diamond
—
—
Humanity's Last Exam
39.2
—
AIME 2025
—
—
MATH-500
—
—
Humanity's Last Exam (with tools)
—
—
AA-Omniscience Accuracy
46.4
—
AA-LCR v1.1
84.0
—
CritPt
14.3
—
MMMU-Pro
77.0
—
IFBench
—
—
Chartography
—
—
Chartography (With Tools)
—
—
Coding
SWE-bench Verified
—
—
SWE-bench Pro
—
—
SWE-bench Multilingual
—
—
LiveCodeBench
—
—
Terminal-Bench 2.1
—
—
Aider Polyglot
—
—
Terminal-Bench 3
—
—
BigCodeBench
—
—
SciCode
51.9
—
CursorBench
—
—
SWE-Rebench
—
—
NL2Repo-Bench
—
—
DeepSWE
—
—
WebDev Arena
1,620
—
Terminal-Bench 4.0
—
—
CursorBench 4.0
—
—
FrontierCode v1.1 (Main)
—
—
Arena
LMArena Elo
—
—
| Metric | DeepSeek V4.1 Flash | DeepSeek V4 Flash Vision Exp | Delta |
|---|---|---|---|
| Identity | |||
| Organization | DeepSeek | DeepSeek | — |
| Family | DeepSeek | DeepSeek | — |
| License | MIT | Proprietary | — |
| Open weights | Yes | No | — |
| Release | Sep 10, 2026 | Aug 21, 2026 | — |
| Knowledge cutoff | - | - | — |
| API / provider | DeepSeek | DeepSeek | — |
| Modalities | text, image → text | text, image → text | — |
| Specs | |||
| Context window | 1M | 1M | tie |
| Max output | 384K | 384K | tie |
| Parameters | 552B (16B act.) | 304B | A +248 |
| Pricing | |||
| Input $/1M | $0.30 | $0.44 | A +$0.14 |
| Output $/1M | $1.20 | $1.32 | A +$0.12 |
| Blended $/1M (3∶1) | $0.52 | $0.66 | A +$0.14 |
| Speed | |||
| tok/s | - | - | — |
| TTFT (s) | - | - | — |
| Reasoning | |||
| MMLU-Pro | — | — | — |
| GPQA Diamond | — | — | — |
| Humanity's Last Exam | 39.2 | — | — |
| AIME 2025 | — | — | — |
| MATH-500 | — | — | — |
| Humanity's Last Exam (with tools) | — | — | — |
| AA-Omniscience Accuracy | 46.4 | — | — |
| AA-LCR v1.1 | 84.0 | — | — |
| CritPt | 14.3 | — | — |
| MMMU-Pro | 77.0 | — | — |
| IFBench | — | — | — |
| Chartography | — | — | — |
| Chartography (With Tools) | — | — | — |
| Coding | |||
| SWE-bench Verified | — | — | — |
| SWE-bench Pro | — | — | — |
| SWE-bench Multilingual | — | — | — |
| LiveCodeBench | — | — | — |
| Terminal-Bench 2.1 | — | — | — |
| Aider Polyglot | — | — | — |
| Terminal-Bench 3 | — | — | — |
| BigCodeBench | — | — | — |
| SciCode | 51.9 | — | — |
| CursorBench | — | — | — |
| SWE-Rebench | — | — | — |
| NL2Repo-Bench | — | — | — |
| DeepSWE | — | — | — |
| WebDev Arena | 1,620 | — | — |
| Terminal-Bench 4.0 | — | — | — |
| CursorBench 4.0 | — | — | — |
| FrontierCode v1.1 (Main) | — | — | — |
| Arena | |||
| LMArena Elo | — | — | — |
DeepSeek V4.1 Flash
- Context
- 1M / 384K out
- Parameters
- 552B (16B act.)
- Price
- $0.30 / $1.20 peak · $0.15 / $0.60 off-peak
- Speed
- —
- Modalities
- text, image → text
- License
- MIT
New default DeepSeek Flash tier (Sep 10, 2026), the smallest model in a new Causal Encoder-Decoder architecture family: 552B total parameters activating 8B (prefill) / 16B (decode) per token, MIT-licensed weights on Hugging Face. Replaces DeepSeek-V4-Flash and V4-Flash-Vision-Exp, which are retired but still routed to this model for compatibility. DeepSeek's own reported numbers (GPQA Diamond 90.9, Terminal-Bench 2.1 90.6, text-only HLE 39.1) are self-measured and not directly comparable to this catalog's Artificial-Analysis-sourced cells. API pricing: $0.30 in / $1.20 out peak, $0.15 in / $0.60 out off-peak (per 1M tokens); off-peak cache-hit input is $0.003.
DeepSeek V4 Flash Vision Exp
- Context
- 1M / 384K out
- Parameters
- 304B
- Price
- $0.44 / $1.32 peak · $0.22 / $0.66 off-peak
- Speed
- —
- Modalities
- text, image → text
- License
- Proprietary
Experimental API-only vision variant of DeepSeek-V4-Flash-0731 (released Aug 21, 2026), adding image input (up to 600 images/request) while matching the text model on agents, reasoning, and world knowledge. Same rate card as V4-Flash: $0.44 in / $1.32 out peak, $0.22 / $0.66 off-peak, cache-hit $0.007 (per 1M). Benchmarks are DeepSeek's self-reported Harness numbers — close to but trailing Opus 4.8 on most rows (Terminal-Bench 2.1 83.9).
Benchmark charts
Winner bars are emphasized. Per-benchmark deltas sit above each chart.
These two models have no overlapping published benchmarks in our dataset. Compare specs and pricing instead.