LLM AtlasLLM AtlasSearch models

StepFun

Step-3.5-Flash

Overall 70Open weightopen-weight

StepFun's 199B parameter Step-3.5-Flash for text generation and reasoning. 91.9K downloads on HuggingFace. Available in BF16, FP8, and GGUF quantizations.

Last verified: 2026-03-29Confidence: HighSources: 3
textreasoningcodeopen-source
Input price
Not applicable
Output price
Not applicable
Context window
131,072
Max output
32,768
Release date
2026-02-01
Access
open-weight, self-hosted
License
StepFun Open Model License
Last verified
2026-03-29

Capability profile

Radar view of the model's practical strengths. This chart is backed by textual summaries below for crawlability.

Benchmark summary

Leading Chinese open-weight model for text generation and reasoning.

No benchmark series is attached to this model yet. Source links and product metadata are available below.

Strengths

  • • 199B parameters
  • • Multiple quantization formats
  • • 91.9K downloads
  • • Strong reasoning

Trade-offs

  • • Chinese-first model
  • • Limited English benchmarks

Crawlable benchmark analysis

Step-3.5-Flash is positioned as an open-weight llm model with published scores that emphasize its practical fit for buyers evaluating the entry.

Published scores highlight reasoning 78/100, coding 74/100, enterprise readiness 60/100, vision 35/100, speed 80/100, and safety 68/100.

Pricing is not applicable for this self-hosted or open-weight entry. With a context window of 131,072 tokens, it supports large-document analysis and retrieval workflows.

Benchmark coverage is still limited for this entry, so this section focuses on published metadata and deployment fit.

Sources

Provider and distribution links used to verify this model record.

Last verified: 2026-03-29

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