Data points: 121
Model compare
The readout for DeepSeek V4 Flash and Grok 4.3, before the detailed comparison sheet.
Weighted outcome: Grok 4.3. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
Grok 4.3
Grok 4.3 has the higher weighted result; Model A / B score 12 to 88.
Evidence depth
121 data points
Includes 26 benchmark rows, 1 audit samples, and 10 provider examples.
Selection signal
Start with Grok 4.3
The charts below split 37 high-signal samples across speed, scores, and audit health.
Switch either side of this report to compare another model with the same LMSpeed data pipeline.
Select a different model to open a new comparison URL.
This report only uses LMSpeed data for DeepSeek V4 Flash and Grok 4.3: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | DeepSeek V4 Flash | Grok 4.3 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 12.0 pts | 88.0 pts |
| Benchmark category leads | 0 categories | 5 categories |
| Operational advantages | Cheapest input price, Average speed, Provider coverage | First-token latency, Free providers |
| Context window | 1.0M tokens | 1M tokens |
| Max output | 65.5K tokens | No data |
| Modalities | Input Text Output Text | Input Text |
The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.
| Model compare | DeepSeek V4 Flash | Grok 4.3 |
|---|---|---|
| Developer | DeepSeek | xAI |
| Released | Apr 2026 | Apr 2026 |
| Parameters | No data | No data |
| Tokenizer | DeepSeek | Grok |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | deepseek/deepseek-v4-flash | x-ai/grok-4.3 |
| References | No data | No data |
This report only uses LMSpeed data for DeepSeek V4 Flash and Grok 4.3: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
DeepSeek V4 Flash
DeepSeek V4 Flash has these operational advantages: Cheapest input price, Average speed, Provider coverage.
Grok 4.3
Grok 4.3 is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge, Instruction following) and operational dimensions (First-token latency, Free providers).
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.
Avg. score
DeepSeek V4 Flash
47.3
Avg. score
Grok 4.3
54.2
Grok 4.3 leads by 0.7
Grok 4.3 leads by 8.8
Grok 4.3 leads by 4.8
Grok 4.3 leads by 11.2
DeepSeek V4 Flash
No data
Grok 4.3
Grok 4.3 leads by 3.4
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
DeepSeek V4 Flash
winner70.0
Rank #34/127 · confidence 2 · eval date 2026-04-24
Grok 4.3
63.0
Rank #44/127 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
winner$0.280/M
Rank #6/163 · confidence 4
Grok 4.3
$2.50/M
Rank #76/163 · confidence 4
DeepSeek V4 Flash
winner$0.175/M
Rank #12/163 · confidence 4
Grok 4.3
$1.56/M
Rank #95/163 · confidence 4
DeepSeek V4 Flash
winner$0.140/M
Rank #18/163 · confidence 4
Grok 4.3
$1.25/M
Rank #109/163 · confidence 4
DeepSeek V4 Flash
86.7%
Rank #35/187 · confidence 4
Grok 4.3
winner90.1%
Rank #18/187 · confidence 4
DeepSeek V4 Flash
27.8%
Rank #35/186 · confidence 4
Grok 4.3
winner35.0%
Rank #20/186 · confidence 4
DeepSeek V4 Flash
7.1
Rank #29/73 · confidence 2 · eval date 2026-04-24
Grok 4.3
winner8.0
Rank #27/73 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
63.0
Rank #53/89 · confidence 2 · eval date 2026-04-24
Grok 4.3
winner64.3
Rank #48/89 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
winner56.2
Rank #22/58 · confidence 2 · eval date 2026-04-24
Grok 4.3
42.3
Rank #38/58 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
42.0%
Rank #51/184 · confidence 4
Grok 4.3
winner47.3%
Rank #22/184 · confidence 4
DeepSeek V4 Flash
44.9
Rank #41/96 · confidence 2 · eval date 2026-04-24
Grok 4.3
winner47.3
Rank #30/96 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
winner72.0
Rank #32/100 · confidence 2 · eval date 2026-04-24
Grok 4.3
61.3
Rank #57/100 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
35.6
Rank #38/85 · confidence 2 · eval date 2026-04-24
Grok 4.3
winner37.9
Rank #35/85 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
winner95.8
Rank #1/90 · confidence 2 · eval date 2026-04-24
Grok 4.3
25.0
Rank #86/90 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
89.4
Rank #27/96 · confidence 2 · eval date 2026-04-24
Grok 4.3
winner90.1
Rank #19/96 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
32.1
Rank #27/96 · confidence 2 · eval date 2026-04-24
Grok 4.3
winner35.0
Rank #22/96 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
winner40.3
Rank #26/99 · confidence 2 · eval date 2026-04-24
Grok 4.3
37.6
Rank #40/99 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
winner37.2
Rank #33/90 · confidence 2 · eval date 2026-04-24
Grok 4.3
34.6
Rank #36/90 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
winner65.4
Rank #41/92 · confidence 2 · eval date 2026-04-24
Grok 4.3
63.7
Rank #44/92 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
winner1242.0
Rank #32/65 · confidence 2 · eval date 2026-04-24
Grok 4.3
1232.0
Rank #33/65 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
79.2
Rank #5/86 · confidence 2 · eval date 2026-04-24
Grok 4.3
winner81.3
Rank #2/86 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
95.0
Rank #19/84 · confidence 2 · eval date 2026-04-24
Grok 4.3
winner97.7
Rank #7/84 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
winner31.1
Rank #15/54 · confidence 2 · eval date 2026-04-24
Grok 4.3
24.1
Rank #31/54 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
winner54.4
Rank #17/50 · confidence 2 · eval date 2026-04-24
Grok 4.3
43.9
Rank #31/50 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
winner1189.0
Rank #22/54 · confidence 2 · eval date 2026-04-24
Grok 4.3
1085.0
Rank #30/54 · confidence 1 · eval date 2026-04-30
DeepSeek V4 Flash
winner34.4
Rank #22/50 · confidence 2 · eval date 2026-04-24
Grok 4.3
29.2
Rank #30/50 · confidence 1 · eval date 2026-04-30
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | DeepSeek V4 Flash | Grok 4.3 |
|---|---|---|
Winner: DeepSeek V4 Flash | DeepSeek V4 Flash deepseek-v4-flash Audit score 84 787584100 | Grok 4.3 grok-4.3 No audit yet |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | DeepSeek V4 Flash | Grok 4.3 |
|---|---|---|
10 tests | DeepSeek V4 Flash speed / latency 88 tok/s / 3315ms input / output No data | Grok 4.3 speed / latency 49 tok/s / 6488ms input / output No data |
10 tests | DeepSeek V4 Flash speed / latency 76 tok/s / 2331ms input / output No data | Grok 4.3 speed / latency N/A / N/A input / output No data |
10 tests | DeepSeek V4 Flash speed / latency 16 tok/s / 14964ms input / output No data | Grok 4.3 speed / latency N/A / N/A input / output No data |
5 tests | DeepSeek V4 Flash speed / latency 21 tok/s / 2787ms input / output No data | Grok 4.3 speed / latency N/A / N/A input / output No data |
5 tests | DeepSeek V4 Flash speed / latency 86 tok/s / 2463ms input / output No data | Grok 4.3 speed / latency N/A / N/A input / output No data |
DeepSeek V4 Flash deepseek-v4-flash speed / latency No data input / output $0/M/$0/M | Grok 4.3 grok-4.3 speed / latency No data input / output $0.120/M | |
DeepSeek V4 Flash deepseek-v4-flash speed / latency No data input / output $0/M/$0/M | Grok 4.3 grok-4.3-fast speed / latency No data input / output $75.00/M | |
DeepSeek V4 Flash deepseek-v4-flash-free speed / latency No data input / output $0/request | Grok 4.3 grok-4.3 speed / latency No data input / output $0.146/request | |
DeepSeek V4 Flash deepseek-v4-flash speed / latency No data input / output $0/M/$0/M | Grok 4.3 grok-4.3 speed / latency No data input / output $0.086/M | |
DeepSeek V4 Flash deepseek-v4-flash speed / latency No data input / output $0/request | Grok 4.3 grok-4.3 speed / latency No data input / output $0/request |
Weighted outcome: Grok 4.3. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Output
| Features | Text inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
