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Step 3.7 Flash

Stepfun Proprietary Released May 2026
18.3
Vibe Coding Index · #43 of 50
Verified data — every figure is cited. See sources.
Quality #43/50
18.3
VCI
Price #6/47
$0.44
$/M blended
Speed
—
tok/s
Latency
—
to first token

Suite radar

Intelligence Coding Agentic

Suite scores

Intelligence
General reasoning & knowledge (Artificial Analysis Intelligence Index)
30
↗
Coding
Code generation & software tasks (Coding Index)
40
↗
Agentic
Multi-step tool use & agentic workflows (Agentic Index)
22
↗
Figure sources
Artificial Analysis via OpenRouter ↗

Where Step 3.7 Flash sits

Its dot is ringed on the cost×quality and speed×quality frontiers.

↖ Best value Premium ↗ ↙ Budget Poor value ↘ 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 $0.01 $0.03 $0.1 $0.32 $1 $3.16 $10 $31.62 BLENDED COST — $ / 1M TOKENS (LOG) VIBE CODING INDEX GPT-5.6 Sol GPT-5.6 Terra Claude Sonnet 5 Grok 4.5 GPT-5.6 Luna GLM-5.2 MiniMax-M3 DeepSeek V4 Flash Nemotron 3 Ultra 550B A55B Step 3.7 Flash
Efficient frontier Alibaba Anthropic DeepSeek Google Inclusionai MiniMax Mistral Moonshot NVIDIA OpenAI Stepfun Xiaomi Zhipu xAI Hover, tap or focus a point · dashed lines = medians 3 model(s) hidden — data not yet verified
↖ Smart but slow Fast & smart ↗ ↙ Laggards Fast but shallow ↘ OUTPUT SPEED — TOKENS / SECOND VIBE CODING INDEX
Efficient frontier Hover, tap or focus a point · dashed lines = medians 50 model(s) hidden — data not yet verified
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