Model comparison
Claude 3 Haiku vs Step 3.7 Flash
Step 3.7 Flash is the stronger model overall, scoring 37.3 to 25.9 on the Noometry Index.
Last verified . 0 shared benchmarks.
StepFunSummary
- The widest gap is in math, where Step 3.7 Flash leads 42.9 to 9.8.
- Step 3.7 Flash has downloadable open weights; the other is API-only.
Side by side
| Claude 3 Haiku | Step 3.7 Flash | |
|---|---|---|
| Provider | Anthropic | StepFun |
| Noometry Index | 25.9 | 37.3 |
| Released | 2024-03-07 | 2026-05-29 |
| Weights | Proprietary | Open |
| Context window | — | 256K |
| Max output | — | 256K |
| Input $ / M tokens | — | $0.18 |
| Output $ / M tokens | — | $1.11 |
| Results tracked | 37 | 5 |
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Category by category
Coding Step 3.7 Flash leads
Claude 3 Haiku: 26.4 (#325), Step 3.7 Flash: 40.0 (#150)
| Benchmark | Claude 3 Haiku | Step 3.7 Flash |
|---|---|---|
| SciCode | — | 40% |
| WeirdML | 9.8% | — |
| BigCodeBench Instruct | 39.4% | — |
| LMArena Coding | 1199 | — |
| BigCodeBench Complete | 50.1% | — |
| CadEval | 12% | — |
| ALE-Bench | — | 694.12 |
| HumanEval+ | 68.9% | — |
| MBPP+ | 68.8% | — |
Reasoning Step 3.7 Flash leads
Claude 3 Haiku: 16.3 (#307), Step 3.7 Flash: 21.6 (#219)
| Benchmark | Claude 3 Haiku | Step 3.7 Flash |
|---|---|---|
| Kagi LLM Benchmark | 34.2% | — |
| NYT Connections (extended) | — | 39.7% |
| CritPt | — | 2.3% |
| LMArena Hard Prompts | 1174 | — |
| DTBench | 50.1% | — |
| LMCA | 8.8% | — |
| Epoch Capabilities Index | 118.35 | — |
| ForecastBench | 53.2 | — |
| WinoGrande | 74.2% | — |
Math Step 3.7 Flash leads
Claude 3 Haiku: 9.8 (#319), Step 3.7 Flash: 42.9 (#82)
| Benchmark | Claude 3 Haiku | Step 3.7 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | — | 68.5% |
| OTIS Mock AIME 2024-2025 | 1.8% | — |
| LMArena Math | 1188 | — |
| MATH Level 5 | 14.9% | — |
Knowledge Not comparable
Claude 3 Haiku: 17.3 (#285), Step 3.7 Flash: —
| Benchmark | Claude 3 Haiku | Step 3.7 Flash |
|---|---|---|
| GPQA Diamond | 36.3% | — |
| Confabulations | 34.2% | — |
| LMArena Expert | 1148 | — |
| MMLU | 73.8% | — |
Multimodal Not comparable
Claude 3 Haiku: 23.6 (#128), Step 3.7 Flash: —
| Benchmark | Claude 3 Haiku | Step 3.7 Flash |
|---|---|---|
| LMArena Vision | 950 | — |
| ScienceQA | 72% | — |
Multilingual Not comparable
Claude 3 Haiku: 36.0 (#243), Step 3.7 Flash: —
| Benchmark | Claude 3 Haiku | Step 3.7 Flash |
|---|---|---|
| LMArena Non-English | 1178 | — |
| LMArena Chinese | 1155 | — |
| LMArena French | 1195 | — |
| LMArena German | 1174 | — |
| LMArena Japanese | 1102 | — |
| LMArena Korean | 1109 | — |
| LMArena Russian | 1204 | — |
| LMArena Spanish | 1166 | — |
Instruction Following Not comparable
Claude 3 Haiku: 61.3 (#247), Step 3.7 Flash: —
| Benchmark | Claude 3 Haiku | Step 3.7 Flash |
|---|---|---|
| LMArena Instruction Following | 1173 | — |
Long Context Not comparable
Claude 3 Haiku: 36.1 (#237), Step 3.7 Flash: —
| Benchmark | Claude 3 Haiku | Step 3.7 Flash |
|---|---|---|
| LMArena Longer Query | 1190 | — |
Writing & Preference Not comparable
Claude 3 Haiku: 29.7 (#291), Step 3.7 Flash: —
| Benchmark | Claude 3 Haiku | Step 3.7 Flash |
|---|---|---|
| LMArena Text | 1195 | — |
| LMArena Creative Writing | 1157 | — |
| EQ-Bench Creative Writing | 717 | — |
| LMArena Multi-Turn | 1190 | — |
Frequently asked questions
Is Claude 3 Haiku better than Step 3.7 Flash?
Step 3.7 Flash is the stronger model overall, scoring 37.3 to 25.9 on the Noometry Index.
Is Claude 3 Haiku or Step 3.7 Flash better for coding?
Step 3.7 Flash scores higher on coding benchmarks: 40.0 versus 26.4 in the Noometry coding category.
How many benchmarks do Claude 3 Haiku and Step 3.7 Flash share?
0 benchmarks have published results for both models. Claude 3 Haiku has 37 scored results on Noometry and Step 3.7 Flash has 5.