Model comparison
DeepSeek V4 Flash vs Sonar Pro
DeepSeek V4 Flash has enough public results to be ranked (#35); Sonar Pro does not yet, so treat this comparison as directional.
Last verified . 0 shared benchmarks.
DeepSeek
PerplexitySummary
- DeepSeek V4 Flash is cheaper at $0.15 / $0.60 per million input/output tokens, against $3 / $15 for Sonar Pro.
- DeepSeek V4 Flash accepts more context: 1M tokens versus 200K.
- DeepSeek V4 Flash has downloadable open weights; the other is API-only.
Side by side
| DeepSeek V4 Flash | Sonar Pro | |
|---|---|---|
| Provider | DeepSeek | Perplexity |
| Noometry Index | 53.6 | — |
| Released | 2026-04-24 | 2024-01-01 |
| Weights | Open | Proprietary |
| Context window | 1M | 200K |
| Max output | 393K | 8K |
| Input $ / M tokens | $0.15 | $3 |
| Output $ / M tokens | $0.60 | $15 |
| Results tracked | 41 | 1 |
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Category by category
Coding Not comparable
DeepSeek V4 Flash: 47.9 (#59), Sonar Pro: —
| Benchmark | DeepSeek V4 Flash | Sonar Pro |
|---|---|---|
| FrontierCode | 18.8% | — |
| LMArena WebDev | 1582 | — |
| SciCode | 49.9% | — |
| WeirdML | 63% | — |
| LMArena Coding | 1457 | — |
| ALE-Bench | 1,306 | — |
Agentic & Tool Use Not comparable
DeepSeek V4 Flash: —, Sonar Pro: —
| Benchmark | DeepSeek V4 Flash | Sonar Pro |
|---|---|---|
| LMArena Search | — | 1130 |
Reasoning Not comparable
DeepSeek V4 Flash: 53.7 (#30), Sonar Pro: —
| Benchmark | DeepSeek V4 Flash | Sonar Pro |
|---|---|---|
| ARC-AGI-2 | 61.4% | — |
| SimpleBench | 61.1% | — |
| Kagi LLM Benchmark | 52.2% | — |
| NYT Connections (extended) | 89.6% | — |
| ARC-AGI-1 | 89% | — |
| CritPt | 16.6% | — |
| Chess Puzzles | 33% | — |
| LMArena Hard Prompts | 1444 | — |
| Mystery Game Puzzles | 34% | — |
| DTBench | 90.9% | — |
| LMCA | 41.7% | — |
| Epoch Capabilities Index | 154.49 | — |
Math Not comparable
DeepSeek V4 Flash: 60.3 (#37), Sonar Pro: —
| Benchmark | DeepSeek V4 Flash | Sonar Pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | 57.5% | — |
| FrontierMath Tier 4 | 24.4% | — |
| MathArena Final-Answer Competitions | 76.5% | — |
| OTIS Mock AIME 2024-2025 | 94.4% | — |
| ProofBench | 56% | — |
| LMArena Math | 1427 | — |
Knowledge Not comparable
DeepSeek V4 Flash: 55.4 (#48), Sonar Pro: —
| Benchmark | DeepSeek V4 Flash | Sonar Pro |
|---|---|---|
| GPQA Diamond | 91% | — |
| SimpleQA Verified | 33.6% | — |
| LMArena Expert | 1441 | — |
Multilingual Not comparable
DeepSeek V4 Flash: 53.0 (#72), Sonar Pro: —
| Benchmark | DeepSeek V4 Flash | Sonar Pro |
|---|---|---|
| LMArena Non-English | 1420 | — |
| LMArena Chinese | 1468 | — |
| LMArena French | 1439 | — |
| LMArena German | 1418 | — |
| LMArena Japanese | 1406 | — |
| LMArena Korean | 1384 | — |
| LMArena Russian | 1428 | — |
| LMArena Spanish | 1436 | — |
Instruction Following Not comparable
DeepSeek V4 Flash: 74.9 (#81), Sonar Pro: —
| Benchmark | DeepSeek V4 Flash | Sonar Pro |
|---|---|---|
| LMArena Instruction Following | 1421 | — |
Long Context Not comparable
DeepSeek V4 Flash: 43.8 (#85), Sonar Pro: —
| Benchmark | DeepSeek V4 Flash | Sonar Pro |
|---|---|---|
| LMArena Longer Query | 1434 | — |
Writing & Preference Not comparable
DeepSeek V4 Flash: 63.8 (#61), Sonar Pro: —
| Benchmark | DeepSeek V4 Flash | Sonar Pro |
|---|---|---|
| LMArena Text | 1432 | — |
| LMArena Creative Writing | 1403 | — |
| EQ-Bench Creative Writing | 1559 | — |
| LMArena Multi-Turn | 1449 | — |
Frequently asked questions
Is DeepSeek V4 Flash better than Sonar Pro?
DeepSeek V4 Flash has enough public results to be ranked (#35); Sonar Pro does not yet, so treat this comparison as directional.
Which is cheaper, DeepSeek V4 Flash or Sonar Pro?
DeepSeek V4 Flash is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; Sonar Pro lists at $3 and $15.
Which has the bigger context window?
DeepSeek V4 Flash does, with 1M tokens against 200K.
How many benchmarks do DeepSeek V4 Flash and Sonar Pro share?
0 benchmarks have published results for both models. DeepSeek V4 Flash has 41 scored results on Noometry and Sonar Pro has 1.