Model comparison
DeepSeek V4.1 Flash vs Sonar
DeepSeek V4.1 Flash is the stronger model overall, scoring 52.8 to 38.5 on the Noometry Index.
Last verified . 0 shared benchmarks.
DeepSeek
PerplexitySummary
- The widest gap is in math, where DeepSeek V4.1 Flash leads 66.7 to 33.7.
- DeepSeek V4.1 Flash is cheaper at $0.15 / $0.60 per million input/output tokens, against $1 / $1 for Sonar.
- DeepSeek V4.1 Flash accepts more context: 1M tokens versus 128K.
- DeepSeek V4.1 Flash has downloadable open weights; the other is API-only.
Side by side
| DeepSeek V4.1 Flash | Sonar | |
|---|---|---|
| Provider | DeepSeek | Perplexity |
| Noometry Index | 52.8 | 38.5 |
| Released | 2026-09-09 | 2024-01-01 |
| Weights | Open | Proprietary |
| Context window | 1M | 128K |
| Max output | 393K | 4K |
| Input $ / M tokens | $0.15 | $1 |
| Output $ / M tokens | $0.60 | $1 |
| Results tracked | 37 | 7 |
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Category by category
Coding DeepSeek V4.1 Flash leads
DeepSeek V4.1 Flash: 52.9 (#32), Sonar: 35.7 (#221)
| Benchmark | DeepSeek V4.1 Flash | Sonar |
|---|---|---|
| LMArena WebDev | 1619 | — |
| SciCode | 51.9% | — |
| LiveBench Coding | — | 35.1% |
| LMArena Coding | 1506 | — |
| ALE-Bench | 1,092 | — |
Agentic & Tool Use Not comparable
DeepSeek V4.1 Flash: 31.2 (#69), Sonar: —
| Benchmark | DeepSeek V4.1 Flash | Sonar |
|---|---|---|
| APEX-Agents | 39.5% | — |
| GDP.pdf | 19.8% | — |
Reasoning DeepSeek V4.1 Flash leads
DeepSeek V4.1 Flash: 50.2 (#36), Sonar: 21.1 (#227)
| Benchmark | DeepSeek V4.1 Flash | Sonar |
|---|---|---|
| NYT Connections (extended) | 89.6% | — |
| CritPt | 14.3% | — |
| LiveBench Reasoning | — | 46.3% |
| LMArena Hard Prompts | 1483 | — |
| Mystery Game Puzzles | 43% | — |
| DTBench | 89.9% | — |
| LiveBench Data Analysis | — | 37.9% |
| LMCA | 47% | — |
| Surface Evolver Bench | 46.3% | — |
| Epoch Capabilities Index | 154.9 | — |
| LiveBench | — | 46.9% |
Math DeepSeek V4.1 Flash leads
DeepSeek V4.1 Flash: 66.7 (#25), Sonar: 33.7 (#200)
| Benchmark | DeepSeek V4.1 Flash | Sonar |
|---|---|---|
| FrontierMath (Tiers 1-3) | 67.4% | — |
| FrontierMath Tier 4 | 26.8% | — |
| OTIS Mock AIME 2024-2025 | 98.3% | — |
| ProofBench | 54% | — |
| LiveBench Math | — | 41.6% |
| LMArena Math | 1477 | — |
Knowledge Not comparable
DeepSeek V4.1 Flash: 57.9 (#38), Sonar: —
| Benchmark | DeepSeek V4.1 Flash | Sonar |
|---|---|---|
| GPQA Diamond | 89.8% | — |
| LMArena Expert | 1506 | — |
Multimodal Not comparable
DeepSeek V4.1 Flash: 39.1 (#61), Sonar: —
| Benchmark | DeepSeek V4.1 Flash | Sonar |
|---|---|---|
| LMArena Vision | 1277 | — |
| Furniture Assembly | 34.2% | — |
Multilingual Not comparable
DeepSeek V4.1 Flash: 55.0 (#35), Sonar: —
| Benchmark | DeepSeek V4.1 Flash | Sonar |
|---|---|---|
| LMArena Non-English | 1448 | — |
| LMArena Chinese | 1497 | — |
| LMArena French | 1452 | — |
| LMArena German | 1484 | — |
| LMArena Japanese | 1412 | — |
| LMArena Korean | 1452 | — |
| LMArena Russian | 1471 | — |
| LMArena Spanish | 1459 | — |
Instruction Following DeepSeek V4.1 Flash leads
DeepSeek V4.1 Flash: 77.3 (#26), Sonar: 71.4 (#150)
| Benchmark | DeepSeek V4.1 Flash | Sonar |
|---|---|---|
| LiveBench Instruction Following | — | 76.2% |
| LMArena Instruction Following | 1474 | — |
Long Context Not comparable
DeepSeek V4.1 Flash: 45.2 (#47), Sonar: —
| Benchmark | DeepSeek V4.1 Flash | Sonar |
|---|---|---|
| LMArena Longer Query | 1475 | — |
Writing & Preference DeepSeek V4.1 Flash leads
DeepSeek V4.1 Flash: 65.4 (#48), Sonar: 52.6 (#167)
| Benchmark | DeepSeek V4.1 Flash | Sonar |
|---|---|---|
| LMArena Text | 1462 | — |
| LMArena Creative Writing | 1435 | — |
| EQ-Bench Creative Writing | 1540 | — |
| LMArena Multi-Turn | 1457 | — |
| LiveBench Language | — | 44.1% |
Frequently asked questions
Is DeepSeek V4.1 Flash better than Sonar?
DeepSeek V4.1 Flash is the stronger model overall, scoring 52.8 to 38.5 on the Noometry Index.
Which is cheaper, DeepSeek V4.1 Flash or Sonar?
DeepSeek V4.1 Flash is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; Sonar lists at $1 and $1.
Is DeepSeek V4.1 Flash or Sonar better for coding?
DeepSeek V4.1 Flash scores higher on coding benchmarks: 52.9 versus 35.7 in the Noometry coding category.
Which has the bigger context window?
DeepSeek V4.1 Flash does, with 1M tokens against 128K.
How many benchmarks do DeepSeek V4.1 Flash and Sonar share?
0 benchmarks have published results for both models. DeepSeek V4.1 Flash has 37 scored results on Noometry and Sonar has 7.