vs
0:3
overall capability wins (0 ties across 3 scored). DeepSeek V4.1 Flash leads overall.
- Pricing3:0
- Specs0:3
Verdict
DeepSeek V4.1 Flash offers ~7.8x larger context (1M vs 128K); DeepSeek V4.1 Flash allows ~46.9x more max output (384K vs 8K); DeepSeek-V2.5 is ~3.0x cheaper on a blended token basis than DeepSeek V4.1 Flash.
- DeepSeek V4.1 Flash offers ~7.8x larger context (1M vs 128K)
- DeepSeek V4.1 Flash allows ~46.9x more max output (384K vs 8K)
- DeepSeek-V2.5 is ~3.0x cheaper on a blended token basis than DeepSeek V4.1 Flash
Cost for 1M in + 250K out
Illustrative chat workload at primary-provider list prices.
- DeepSeek-V2.5
- $0.21
- DeepSeek V4.1 Flash
- $0.60
DeepSeek-V2.5 is about 2.9x cheaper on this workload.
Price per 1M tokens
Full comparison
Organization
DeepSeek
DeepSeek
Family
DeepSeek
DeepSeek
License
DeepSeek
MIT
Open weights
Yes
Yes
Release
Sep 5, 2024
Sep 10, 2026
Knowledge cutoff
-
-
API / provider
DeepSeek
DeepSeek
Modalities
text → text
text, image → text
Specs
Context window
128K
1M
Max output
8K
384K
Parameters
236B (21B act.)
552B (16B act.)
Pricing
Input $/1M
$0.14
$0.30
Output $/1M
$0.28
$1.20
Blended $/1M (3∶1)
$0.18
$0.52
Speed
tok/s
85
-
TTFT (s)
0.35
-
Reasoning
MMLU-Pro
—
—
GPQA Diamond
42.3
—
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
1,307
—
| Metric | DeepSeek-V2.5 | DeepSeek V4.1 Flash | Delta |
|---|---|---|---|
| Identity | |||
| Organization | DeepSeek | DeepSeek | — |
| Family | DeepSeek | DeepSeek | — |
| License | DeepSeek | MIT | — |
| Open weights | Yes | Yes | — |
| Release | Sep 5, 2024 | Sep 10, 2026 | — |
| Knowledge cutoff | - | - | — |
| API / provider | DeepSeek | DeepSeek | — |
| Modalities | text → text | text, image → text | — |
| Specs | |||
| Context window | 128K | 1M | B +872K |
| Max output | 8K | 384K | B +376K |
| Parameters | 236B (21B act.) | 552B (16B act.) | B +316 |
| Pricing | |||
| Input $/1M | $0.14 | $0.30 | A +$0.16 |
| Output $/1M | $0.28 | $1.20 | A +$0.92 |
| Blended $/1M (3∶1) | $0.18 | $0.52 | A +$0.35 |
| Speed | |||
| tok/s | 85 | - | — |
| TTFT (s) | 0.35 | - | — |
| Reasoning | |||
| MMLU-Pro | — | — | — |
| GPQA Diamond | 42.3 | — | — |
| 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 | 1,307 | — | — |
DeepSeek-V2.5
- Context
- 128K / 8K out
- Parameters
- 236B (21B act.)
- Price
- $0.14 / $0.28
- Speed
- 85 tok/s · 0.35s TTFT
- Modalities
- text → text
- License
- DeepSeek
Unified chat+code upgrade of DeepSeek-V2 — bridge release before DeepSeek-V3 on DeepSeek's API.
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.
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.