Model comparison
Llama-3.3-70B-Instruct vs Step 3.5 Flash
Step 3.5 Flash is the stronger model overall, scoring 42.3 to 30.6 on the Noometry Index.
Last verified . 17 shared benchmarks.
Meta
StepFunSummary
- They share 17 benchmarks with published results for both. Llama-3.3-70B-Instruct scores higher in 0 categories and Step 3.5 Flash in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Step 3.5 Flash leads 42.6 to 15.3.
- Both cost about the same: $0.10 input and $0.32 output per million tokens.
- Step 3.5 Flash accepts more context: 256K tokens versus 128K.
Side by side
| Llama-3.3-70B-Instruct | Step 3.5 Flash | |
|---|---|---|
| Provider | Meta | StepFun |
| Noometry Index | 30.6 | 42.3 |
| Released | 2024-12-06 | 2026-01-29 |
| Weights | Open | Open |
| Context window | 128K | 256K |
| Max output | 4K | 256K |
| Input $ / M tokens | $0.10 | $0.10 |
| Output $ / M tokens | $0.32 | $0.30 |
| Results tracked | 43 | 19 |
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Category by category
Coding Step 3.5 Flash leads
Llama-3.3-70B-Instruct: 31.0 (#290), Step 3.5 Flash: 42.4 (#105)
| Benchmark | Llama-3.3-70B-Instruct | Step 3.5 Flash |
|---|---|---|
| LMArena Coding | 1268 | 1436 |
| SciCode | 26% | — |
| WeirdML | 14.4% | — |
| BigCodeBench Instruct | 46.9% | — |
| LiveBench Coding | 36.6% | — |
| BigCodeBench Complete | 57.5% | — |
Agentic & Tool Use Not comparable
Llama-3.3-70B-Instruct: 25.8 (#105), Step 3.5 Flash: —
| Benchmark | Llama-3.3-70B-Instruct | Step 3.5 Flash |
|---|---|---|
| Berkeley Function Calling Leaderboard | 31.9% | — |
| BALROG | 23% | — |
Reasoning Step 3.5 Flash leads
Llama-3.3-70B-Instruct: 14.1 (#327), Step 3.5 Flash: 22.2 (#202)
| Benchmark | Llama-3.3-70B-Instruct | Step 3.5 Flash |
|---|---|---|
| LMArena Hard Prompts | 1257 | 1411 |
| SimpleBench | 19.9% | — |
| NYT Connections (extended) | — | 28.4% |
| CritPt | 0% | — |
| LiveBench Reasoning | 50.8% | — |
| DTBench | 59.5% | — |
| LiveBench Data Analysis | 49.5% | — |
| LMCA | 17.5% | — |
| Epoch Capabilities Index | 127.33 | — |
| ForecastBench | 58.6 | — |
| LiveBench | 50.2% | — |
Math Step 3.5 Flash leads
Llama-3.3-70B-Instruct: 15.3 (#298), Step 3.5 Flash: 42.6 (#84)
| Benchmark | Llama-3.3-70B-Instruct | Step 3.5 Flash |
|---|---|---|
| LMArena Math | 1267 | 1408 |
| MathArena Final-Answer Competitions | — | 66.8% |
| OTIS Mock AIME 2024-2025 | 5.1% | — |
| LiveBench Math | 42.2% | — |
| MATH Level 5 | 41.6% | — |
Knowledge Step 3.5 Flash leads
Llama-3.3-70B-Instruct: 30.6 (#226), Step 3.5 Flash: 39.6 (#132)
| Benchmark | Llama-3.3-70B-Instruct | Step 3.5 Flash |
|---|---|---|
| LMArena Expert | 1225 | 1421 |
| GPQA Diamond | 47.4% | — |
| Confabulations | 22.8% | — |
| Vectara Hallucination Rate | 4.1% | — |
| MMLU | 86.3% | — |
Multilingual Step 3.5 Flash leads
Llama-3.3-70B-Instruct: 39.9 (#220), Step 3.5 Flash: 50.5 (#119)
| Benchmark | Llama-3.3-70B-Instruct | Step 3.5 Flash |
|---|---|---|
| LMArena Non-English | 1236 | 1385 |
| LMArena Chinese | 1217 | 1447 |
| LMArena French | 1281 | 1421 |
| LMArena German | 1251 | 1405 |
| LMArena Japanese | 1150 | 1354 |
| LMArena Korean | 1143 | 1352 |
| LMArena Russian | 1252 | 1385 |
| LMArena Spanish | 1270 | 1419 |
Instruction Following Step 3.5 Flash leads
Llama-3.3-70B-Instruct: 71.1 (#157), Step 3.5 Flash: 73.1 (#124)
| Benchmark | Llama-3.3-70B-Instruct | Step 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | 1242 | 1385 |
| LiveBench Instruction Following | 82.7% | — |
Long Context Step 3.5 Flash leads
Llama-3.3-70B-Instruct: 26.4 (#295), Step 3.5 Flash: 42.8 (#117)
| Benchmark | Llama-3.3-70B-Instruct | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | 1256 | 1402 |
| Fiction.LiveBench | 33.3% | — |
Writing & Preference Step 3.5 Flash leads
Llama-3.3-70B-Instruct: 47.6 (#207), Step 3.5 Flash: 58.8 (#113)
| Benchmark | Llama-3.3-70B-Instruct | Step 3.5 Flash |
|---|---|---|
| LMArena Text | 1274 | 1403 |
| LMArena Creative Writing | 1250 | 1357 |
| LMArena Multi-Turn | 1280 | 1405 |
| LiveBench Language | 39.2% | — |
Frequently asked questions
Is Llama-3.3-70B-Instruct better than Step 3.5 Flash?
Step 3.5 Flash is the stronger model overall, scoring 42.3 to 30.6 on the Noometry Index.
Which is cheaper, Llama-3.3-70B-Instruct or Step 3.5 Flash?
Step 3.5 Flash is cheaper. It lists at $0.10 per million input tokens and $0.30 per million output tokens; Llama-3.3-70B-Instruct lists at $0.10 and $0.32.
Is Llama-3.3-70B-Instruct or Step 3.5 Flash better for coding?
Step 3.5 Flash scores higher on coding benchmarks: 42.4 versus 31.0 in the Noometry coding category.
Which has the bigger context window?
Step 3.5 Flash does, with 256K tokens against 128K.
How many benchmarks do Llama-3.3-70B-Instruct and Step 3.5 Flash share?
17 benchmarks have published results for both models. Llama-3.3-70B-Instruct has 43 scored results on Noometry and Step 3.5 Flash has 19.