LLM AtlasLLM AtlasSearch models

StepFun

NextStep-1.1

Overall 42Open weightopen-weight

StepFun's 15B NextStep-1.1 for text-to-image generation. Supports image editing and modification based on text prompts.

Last verified: 2026-03-29Confidence: HighSources: 3
imagevisionopen-source
Input price
Not applicable
Output price
Not applicable
Context window
512
Max output
1
Release date
2026-02-16
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

Open-weight text-to-image and image editing model.

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

Strengths

  • • Text-to-image generation
  • • Image editing
  • • Open weights

Trade-offs

  • • Specialized for images
  • • 256px resolution limit

Crawlable benchmark analysis

NextStep-1.1 is positioned as an open-weight image model with published scores that emphasize its practical fit for buyers evaluating the entry.

Published scores highlight reasoning 12/100, coding 5/100, enterprise readiness 52/100, vision 78/100, speed 75/100, and safety 60/100.

Pricing is not applicable for this self-hosted or open-weight entry. With a context window of 512 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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