vs
0:5
overall capability wins (0 ties across 5 scored). DeepSeek V4 Flash leads overall.
- Reasoning0:1
- Arena0:1
- Speed0:2
- Specs0:3
Verdict
DeepSeek V4 Flash edges reasoning & knowledge; DeepSeek V4 Flash ranks higher on LMArena (+129 Elo); DeepSeek V4 Flash offers ~7.8x larger context (1M vs 128K).
- DeepSeek V4 Flash edges reasoning & knowledge
- DeepSeek V4 Flash ranks higher on LMArena (+129 Elo)
- DeepSeek V4 Flash offers ~7.8x larger context (1M vs 128K)
- DeepSeek V4 Flash allows ~46.9x more max output (384K vs 8K)
Cost for 1M in + 250K out
Illustrative chat workload at primary-provider list prices.
- DeepSeek-V2.5
- $0.21
- DeepSeek V4 Flash
- $0.21
Price per 1M tokens
Full comparison
Organization
DeepSeek
DeepSeek
Family
DeepSeek
DeepSeek
License
DeepSeek
MIT
Open weights
Yes
Yes
Release
Sep 5, 2024
Apr 24, 2026
Knowledge cutoff
-
-
API / provider
DeepSeek
DeepSeek
Modalities
text → text
text → text
Specs
Context window
128K
1M
Max output
8K
384K
Parameters
236B (21B act.)
284B (13B act.)
Pricing
Input $/1M
$0.14
$0.14
Output $/1M
$0.28
$0.28
Blended $/1M (3∶1)
$0.18
$0.18
Speed
tok/s
85
120
TTFT (s)
0.35
0.25
Reasoning
MMLU-Pro
—
—
GPQA Diamond
42.3
89.4
Humanity's Last Exam
—
34.8
AIME 2025
—
—
MATH-500
—
—
Humanity's Last Exam (with tools)
—
—
AA-Omniscience Accuracy
—
36.8
AA-LCR v1.1
—
74.3
CritPt
—
7.1
MMMU-Pro
—
—
IFBench
—
79.2
Chartography
—
—
Chartography (With Tools)
—
—
Coding
SWE-bench Verified
—
—
SWE-bench Pro
—
—
SWE-bench Multilingual
—
—
LiveCodeBench
—
—
Terminal-Bench 2.1
—
61.8
Aider Polyglot
—
—
Terminal-Bench 3
—
—
BigCodeBench
—
—
SciCode
—
45.3
CursorBench
—
—
SWE-Rebench
—
38.4
NL2Repo-Bench
—
39.4
DeepSWE
—
7.3
WebDev Arena
—
1,580
Terminal-Bench 4.0
—
—
CursorBench 4.0
—
—
FrontierCode v1.1 (Main)
—
—
Arena
LMArena Elo
1,307
1,436
| Metric | DeepSeek-V2.5 | DeepSeek V4 Flash | Delta |
|---|---|---|---|
| Identity | |||
| Organization | DeepSeek | DeepSeek | — |
| Family | DeepSeek | DeepSeek | — |
| License | DeepSeek | MIT | — |
| Open weights | Yes | Yes | — |
| Release | Sep 5, 2024 | Apr 24, 2026 | — |
| Knowledge cutoff | - | - | — |
| API / provider | DeepSeek | DeepSeek | — |
| Modalities | text → text | text → text | — |
| Specs | |||
| Context window | 128K | 1M | B +872K |
| Max output | 8K | 384K | B +376K |
| Parameters | 236B (21B act.) | 284B (13B act.) | B +48 |
| Pricing | |||
| Input $/1M | $0.14 | $0.14 | tie |
| Output $/1M | $0.28 | $0.28 | tie |
| Blended $/1M (3∶1) | $0.18 | $0.18 | tie |
| Speed | |||
| tok/s | 85 | 120 | B +35 |
| TTFT (s) | 0.35 | 0.25 | B +0.10 |
| Reasoning | |||
| MMLU-Pro | — | — | — |
| GPQA Diamond | 42.3 | 89.4 | B +47.1 pts |
| Humanity's Last Exam | — | 34.8 | — |
| AIME 2025 | — | — | — |
| MATH-500 | — | — | — |
| Humanity's Last Exam (with tools) | — | — | — |
| AA-Omniscience Accuracy | — | 36.8 | — |
| AA-LCR v1.1 | — | 74.3 | — |
| CritPt | — | 7.1 | — |
| MMMU-Pro | — | — | — |
| IFBench | — | 79.2 | — |
| Chartography | — | — | — |
| Chartography (With Tools) | — | — | — |
| Coding | |||
| SWE-bench Verified | — | — | — |
| SWE-bench Pro | — | — | — |
| SWE-bench Multilingual | — | — | — |
| LiveCodeBench | — | — | — |
| Terminal-Bench 2.1 | — | 61.8 | — |
| Aider Polyglot | — | — | — |
| Terminal-Bench 3 | — | — | — |
| BigCodeBench | — | — | — |
| SciCode | — | 45.3 | — |
| CursorBench | — | — | — |
| SWE-Rebench | — | 38.4 | — |
| NL2Repo-Bench | — | 39.4 | — |
| DeepSWE | — | 7.3 | — |
| WebDev Arena | — | 1,580 | — |
| Terminal-Bench 4.0 | — | — | — |
| CursorBench 4.0 | — | — | — |
| FrontierCode v1.1 (Main) | — | — | — |
| Arena | |||
| LMArena Elo | 1,307 | 1,436 | B +129 Elo |
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 Flash
- Context
- 1M / 384K out
- Parameters
- 284B (13B act.)
- Price
- $0.14 / $0.28
- Speed
- 120 tok/s · 0.25s TTFT
- Modalities
- text → text
- License
- MIT
Budget DeepSeek V4 API tier (Apr 2026 preview). Superseded by DeepSeek-V4-Flash-0731 (public beta), which re-post-trains the same architecture and reports far stronger agent benchmarks.
Benchmark charts
Winner bars are emphasized. Per-benchmark deltas sit above each chart.