Comprehensive side-by-side LLM comparison
Doubao 1.5 Vision Pro supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
ByteDance
Doubao 1.5 Vision Pro, released by ByteDance via Volcano Engine on January 22, 2025, is a multimodal large language model from the Doubao 1.5 family with comprehensive upgrades to visual reasoning, OCR, and fine-grained image understanding. Built on a large-scale sparse MoE architecture, it targets vision-intensive workflows including document analysis, chart interpretation, and visual question answering.
StepFun
Step-3.5-Flash, released by StepFun on February 2, 2026, is a Mixture-of-Experts large language model with 197 billion total parameters and approximately 11 billion active parameters per inference. It features a 256K token context window using a 3:1 sliding-window-to-full-attention ratio, processing 100–350 tokens per second. Step-3.5-Flash targets agentic tasks, coding workflows, and open-source deployments requiring frontier reasoning capabilities with efficient inference, under an Apache 2.0 license.
1 year newer
Doubao 1.5 Vision Pro
ByteDance
2025-01-22
Step-3.5-Flash
StepFun
2026-02-02
Context window and performance specifications
Available providers and their performance metrics
Doubao 1.5 Vision Pro
ByteDance API
Step-3.5-Flash
Doubao 1.5 Vision Pro
Step-3.5-Flash
Doubao 1.5 Vision Pro
Step-3.5-Flash