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Grok 3 vs Step-3.5-Flash
Comprehensive side-by-side LLM comparison
Grok 3 supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
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xAI
Grok 3, released by xAI in February 2025, is a large language model trained on xAI's Colossus supercluster with substantially increased compute over previous generations. It features a 1M token context window, RL-enhanced Think mode for extended reasoning, and demonstrated strong results on mathematics, coding, and scientific benchmarks. Grok 3 targets complex reasoning, real-time information tasks via X platform integration, 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.
11 months newer
Grok 3
xAI
2025-02-17
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 3
1 providers
xAI
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Step-3.5-Flash
0 providers
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Grok 3
Avg Score:0.0%
Providers:1
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Step-3.5-Flash
Avg Score:0.0%
Providers:0