#170
AC
Qwen3.5 0.8B
Alibaba Cloud / Qwen Team
0.3 LLMBoard
StepFun model product
Step-3.5-Flash is StepFun's fast, cost-effective text model optimized for quick inference. Built on their Step3 architecture, it offers strong performance across text tasks with low latency and efficient token usage, ideal for production workloads requiring speed and cost efficiency.
Updated Aug 10, 2026. Default version: Step-3.5-Flash
Structured fields from the published default version.
This profile uses the latest version under this unique model that has a calculated LLMBoard score. Arena and price are excluded.
No published version under this unique model currently has enough benchmark coverage to calculate a score.
Published benchmark records for the scored version currently unavailable.
No published benchmark result is linked to the scored version.
Preference and agent-evaluation signals from published Arena datasets.
| text factuality | german | 32 | 1396.9 | 503 | N/A | |
| text factuality | korean | 36 | 1360.2 | 513 | N/A | |
| text factuality | japanese | 38 | 1364.3 | 394 | N/A | |
| text factuality | polish | 49 | 1387.6 | 798 | N/A | |
| text factuality | french | 52 | 1451.3 | 1,470 | N/A | |
| text factuality | spanish | 57 | 1416.0 | 1,244 | N/A | |
| text factuality | industry mathematical | 63 | 1429.0 | 2,162 | N/A | |
| text factuality | chinese | 68 | 1468.9 | 2,129 | N/A | |
| text factuality | math | 68 | 1423.3 | 2,298 | N/A | |
| text factuality | expert | 82 | 1445.1 | 3,582 | N/A | |
| text factuality | russian | 86 | 1413.8 | 4,763 | N/A | |
| text | spanish | 87 | 1419.4 | 1,790 | N/A | |
| text factuality | industry legal and government | 90 | 1431.1 | 3,242 | N/A | |
| text factuality | industry medicine and healthcare | 90 | 1444.5 | 2,935 | N/A | |
| text factuality | coding | 92 | 1473.4 | 12,219 | N/A | |
| text factuality | hard prompts english | 97 | 1453.6 | 14,047 | N/A | |
| text factuality | industry software and it services | 97 | 1461.4 | 20,292 | N/A | |
| text factuality | industry life and physical and social science | 99 | 1440.5 | 7,139 | N/A | |
| text | coding | 100 | 1436.7 | 14,275 | N/A | |
| text | expert | 101 | 1423.1 | 4,755 | N/A | |
| text factuality | instruction following | 101 | 1411.1 | 15,879 | N/A | |
| text | japanese | 103 | 1345.5 | 631 | N/A | |
| text | german | 104 | 1399.8 | 1,036 | N/A | |
| text factuality | multi turn | 105 | 1419.4 | 7,697 | N/A | |
| text | industry mathematical | 106 | 1420.3 | 2,876 | N/A | |
| text factuality | english | 106 | 1433.2 | 24,659 | N/A | |
| text | french | 107 | 1419.8 | 1,916 | N/A | |
| text | industry software and it services | 107 | 1435.9 | 21,463 | N/A | |
| text factuality | creative writing | 107 | 1375.7 | 7,110 | N/A | |
| text factuality | industry writing and literature and language | 107 | 1392.9 | 11,545 | N/A | |
| text style control | spanish | 108 | 1404.9 | 1,790 | N/A | |
| text factuality | industry entertainment and sports and media | 110 | 1377.6 | 9,378 | N/A | |
| text factuality | longer query | 110 | 1426.6 | 18,742 | N/A | |
| text style control | industry mathematical | 110 | 1422.3 | 2,876 | N/A | |
| text factuality | industry business and management and financial operations | 111 | 1417.4 | 8,895 | N/A | |
| text | chinese | 112 | 1449.3 | 2,775 | N/A | |
| text factuality | exclude ties | 112 | 1408.8 | 41,228 | N/A | |
| text factuality | overall | 114 | 1417.3 | 56,620 | N/A | |
| text style control | japanese | 114 | 1344.5 | 631 | N/A | |
| text factuality | hard prompts | 115 | 1438.7 | 34,795 | N/A | |
| text | hard prompts english | 116 | 1422.1 | 16,030 | N/A | |
| text style control | expert | 117 | 1430.6 | 4,755 | N/A | |
| text | english | 118 | 1418.0 | 24,998 | N/A | |
| text factuality | non english | 118 | 1398.7 | 31,701 | N/A | |
| text | korean | 119 | 1346.8 | 1,033 | N/A | |
| text | longer query | 119 | 1403.6 | 20,721 | N/A | |
| text | polish | 121 | 1382.1 | 1,293 | N/A | |
| text style control | german | 121 | 1388.2 | 1,036 | N/A | |
| text | math | 122 | 1407.4 | 3,216 | N/A | |
| text | hard prompts | 123 | 1411.3 | 35,053 | N/A | |
| text | industry business and management and financial operations | 123 | 1394.3 | 11,105 | N/A | |
| text | industry legal and government | 124 | 1409.2 | 4,343 | N/A | |
| text style control | math | 124 | 1407.4 | 3,216 | N/A | |
| text | multi turn | 125 | 1403.5 | 9,840 | N/A | |
| text | instruction following | 126 | 1385.1 | 17,879 | N/A | |
| text | industry life and physical and social science | 127 | 1416.3 | 9,146 | N/A | |
| text | exclude ties | 128 | 1385.0 | 41,491 | N/A | |
| text | industry medicine and healthcare | 128 | 1408.4 | 3,952 | N/A | |
| text | overall | 129 | 1403.5 | 56,979 | N/A | |
| text | russian | 129 | 1386.3 | 6,416 | N/A | |
| text style control | coding | 129 | 1450.6 | 14,275 | N/A | |
| text style control | chinese | 130 | 1435.6 | 2,775 | N/A | |
| text style control | french | 130 | 1411.5 | 1,916 | N/A | |
| text style control | industry software and it services | 130 | 1438.6 | 21,463 | N/A | |
| text | industry entertainment and sports and media | 131 | 1360.1 | 11,251 | N/A | |
| text | non english | 131 | 1385.6 | 31,979 | N/A | |
| text style control | korean | 134 | 1335.8 | 1,033 | N/A | |
| text | creative writing | 136 | 1355.6 | 9,130 | N/A | |
| text | industry writing and literature and language | 136 | 1370.5 | 13,770 | N/A | |
| text style control | hard prompts english | 139 | 1425.3 | 16,030 | N/A | |
| text style control | longer query | 139 | 1405.3 | 20,721 | N/A | |
| text style control | instruction following | 141 | 1385.2 | 17,879 | N/A | |
| text style control | english | 142 | 1410.1 | 24,998 | N/A | |
| text style control | multi turn | 143 | 1396.0 | 9,840 | N/A | |
| text style control | overall | 145 | 1394.3 | 56,979 | N/A | |
| text style control | exclude ties | 145 | 1372.9 | 41,491 | N/A | |
| text style control | hard prompts | 148 | 1413.4 | 35,053 | N/A | |
| text style control | industry business and management and financial operations | 148 | 1390.2 | 11,105 | N/A | |
| text style control | non english | 149 | 1375.0 | 31,979 | N/A | |
| text style control | industry life and physical and social science | 150 | 1406.3 | 9,146 | N/A | |
| text style control | russian | 150 | 1376.5 | 6,416 | N/A | |
| text style control | polish | 153 | 1362.0 | 1,293 | N/A | |
| text style control | industry legal and government | 155 | 1395.9 | 4,343 | N/A | |
| text style control | industry writing and literature and language | 155 | 1365.0 | 13,770 | N/A | |
| text style control | industry entertainment and sports and media | 156 | 1348.9 | 11,251 | N/A | |
| text style control | creative writing | 160 | 1344.3 | 9,130 | N/A | |
| text style control | industry medicine and healthcare | 162 | 1397.3 | 3,952 | N/A |
Official vendor API PAYG pricing is summarized first. The table then lists individual provider offerings without treating their minimum as the official price.
| StepFun (Global) | step-3.5-flash | global | $0.10 | $0.30 | 256K | |
| StepFun (China) | step-3.5-flash | global | $0.10 | $0.30 | 256K |
Official prices use only the vendor's configured official Provider and positive standard USD PAYG rates. Third-party offers remain explicitly labeled.
All published versions linked to this unique model. The score columns identify the version used by the current overall ranking.
| Step-3.5-Flash | N/A | 196B | 256K | 256K | Yes | Apache 2.0 |
A concise description based on the published model registry.
Step-3.5-Flash is StepFun's fast, cost-effective text model optimized for quick inference. Built on their Step3 architecture, it offers strong performance across text tasks with low latency and efficient token usage, ideal for production workloads requiring speed and cost efficiency.
Use the benchmark, Arena and pricing sections above as separate evidence. A missing field means the current data snapshot does not support that claim.
Data snapshot: 2026-08-07. Editorial model content is not available in the backend.
Recommendations prioritize the same model type and family, then the closest published LLMBoard score.
Common questions about Step 3.5 Flash.
Step 3.5 Flash's default version was released on Feb 2, 2026.
Step 3.5 Flash's official API price is $0.10 per million input tokens and $0.30 per million output tokens via StepFun (Global).
Step 3.5 Flash is published under StepFun in the model registry.
The default version has a 256K token context window.
Yes. The default version is marked as open weight under Apache 2.0.
4 published provider offerings are linked to the default version.
No nearby ranked alternatives are currently available.