Model comparison
DeepSeek-V2.5 (Sep 2024) vs Step 3.5 Flash
Step 3.5 Flash is the stronger model overall, scoring 41.7 to 37.0 on the Noometry Index.
Last verified . 17 shared benchmarks.
DeepSeek
StepFunSummary
- They share 17 benchmarks with published results for both. DeepSeek-V2.5 (Sep 2024) scores higher in 1 category and Step 3.5 Flash in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in coding, where Step 3.5 Flash leads 41.7 to 31.3.
Side by side
| DeepSeek-V2.5 (Sep 2024) | Step 3.5 Flash | |
|---|---|---|
| Provider | DeepSeek | StepFun |
| Noometry Index | 37.0 | 41.7 |
| Released | 2024-09-06 | 2026-01-29 |
| Weights | Open | Open |
| Context window | — | 256K |
| Max output | — | 256K |
| Input $ / M tokens | — | $0.10 |
| Output $ / M tokens | — | $0.30 |
| Results tracked | 22 | 19 |
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Category by category
Coding Step 3.5 Flash leads
DeepSeek-V2.5 (Sep 2024): 31.3 (#274), Step 3.5 Flash: 41.7 (#106)
| Benchmark | DeepSeek-V2.5 (Sep 2024) | Step 3.5 Flash |
|---|---|---|
| LMArena Coding | 1310 | 1436 |
| Aider Polyglot | 17.8% | — |
| BigCodeBench Instruct | 48.6% | — |
| BigCodeBench Complete | 53.2% | — |
| HumanEval+ | 83.5% | — |
| MBPP+ | 74.1% | — |
Reasoning DeepSeek-V2.5 (Sep 2024) leads
DeepSeek-V2.5 (Sep 2024): 24.5 (#145), Step 3.5 Flash: 21.2 (#202)
| Benchmark | DeepSeek-V2.5 (Sep 2024) | Step 3.5 Flash |
|---|---|---|
| LMArena Hard Prompts | 1289 | 1411 |
| NYT Connections (extended) | — | 28.4% |
Math Step 3.5 Flash leads
DeepSeek-V2.5 (Sep 2024): 33.3 (#177), Step 3.5 Flash: 40.6 (#77)
| Benchmark | DeepSeek-V2.5 (Sep 2024) | Step 3.5 Flash |
|---|---|---|
| LMArena Math | 1289 | 1408 |
| MathArena Final-Answer Competitions | — | 66.8% |
Knowledge Step 3.5 Flash leads
DeepSeek-V2.5 (Sep 2024): 34.2 (#190), Step 3.5 Flash: 39.0 (#127)
| Benchmark | DeepSeek-V2.5 (Sep 2024) | Step 3.5 Flash |
|---|---|---|
| LMArena Expert | 1266 | 1422 |
Multilingual Step 3.5 Flash leads
DeepSeek-V2.5 (Sep 2024): 42.7 (#188), Step 3.5 Flash: 50.7 (#115)
| Benchmark | DeepSeek-V2.5 (Sep 2024) | Step 3.5 Flash |
|---|---|---|
| LMArena Non-English | 1273 | 1386 |
| LMArena Chinese | 1317 | 1448 |
| LMArena French | 1288 | 1421 |
| LMArena German | 1258 | 1404 |
| LMArena Japanese | 1228 | 1353 |
| LMArena Korean | 1209 | 1350 |
| LMArena Russian | 1289 | 1385 |
| LMArena Spanish | 1248 | 1419 |
Instruction Following Step 3.5 Flash leads
DeepSeek-V2.5 (Sep 2024): 67.7 (#189), Step 3.5 Flash: 73.3 (#119)
| Benchmark | DeepSeek-V2.5 (Sep 2024) | Step 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | 1280 | 1385 |
Long Context Step 3.5 Flash leads
DeepSeek-V2.5 (Sep 2024): 39.5 (#169), Step 3.5 Flash: 42.8 (#112)
| Benchmark | DeepSeek-V2.5 (Sep 2024) | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | 1301 | 1402 |
Writing & Preference Step 3.5 Flash leads
DeepSeek-V2.5 (Sep 2024): 50.0 (#182), Step 3.5 Flash: 59.0 (#108)
| Benchmark | DeepSeek-V2.5 (Sep 2024) | Step 3.5 Flash |
|---|---|---|
| LMArena Text | 1294 | 1403 |
| LMArena Creative Writing | 1285 | 1357 |
| LMArena Multi-Turn | 1297 | 1405 |
Frequently asked questions
Is DeepSeek-V2.5 (Sep 2024) better than Step 3.5 Flash?
Step 3.5 Flash is the stronger model overall, scoring 41.7 to 37.0 on the Noometry Index.
Is DeepSeek-V2.5 (Sep 2024) or Step 3.5 Flash better for coding?
Step 3.5 Flash scores higher on coding benchmarks: 41.7 versus 31.3 in the Noometry coding category.
How many benchmarks do DeepSeek-V2.5 (Sep 2024) and Step 3.5 Flash share?
17 benchmarks have published results for both models. DeepSeek-V2.5 (Sep 2024) has 22 scored results on Noometry and Step 3.5 Flash has 19.