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Grok 4 vs Step-3.5-Flash
Comprehensive side-by-side LLM comparison
Grok 4 supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
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xAI
Grok 4, released by xAI on July 10, 2025, is a large language model featuring first-principles reasoning and comprehensive multimodal support. It features a 260K token context window and demonstrated strong performance on advanced reasoning and coding benchmarks. Grok 4 targets complex multi-step reasoning tasks, scientific analysis, and agentic workflows via the xAI API.
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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.
6 months newer
Grok 4
xAI
2025-07-10
Step-3.5-Flash
StepFun
2026-02-02
Performance Metrics
Context window and performance specifications
Provider Availability & Performance
Available providers and their performance metrics
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Grok 4
1 providers
xAI
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Step-3.5-Flash
0 providers
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Grok 4
Avg Score:0.0%
Providers:1
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Step-3.5-Flash
Avg Score:0.0%
Providers:0