StepFun: Step 3.5 Flash
microstepfun/step-3.5-flash
Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....
AA INDEX17.0
CONTEXT262K
MODALITYtext->text
OPENNESSProprietary
ADDEDAug 2026
LAST PRICED2 min ago
Input
$0.10 /M
Output
$0.30 /M
Blended (40/60)
$0.22 /M
Cost / IQ
$0.5187 /M
Cost / IQ = Blended Price ÷ (AA Intelligence Score ÷ 40). Normalises price by model intelligence so you can compare value across tiers. Lower = better value per unit of intelligence. Not a transactional price.
24h0%
7d0%
Price History
30-day view, daily close
Low: $0.22/M
High: $0.22/M
Average: $0.22/M
Provider Comparison
1 providers · click a column to sort
| Provider | Input $/M | Output $/M | Blended $/M ↑ | vs Median |
|---|---|---|---|---|
| ↓SiliconFlow | $0.10 | $0.30 | $0.22 | median |
Blended price = 40% input + 60% output. Median price shown in header is the reference price for this model.
Cost / IQ Comparison
Cost / IQ (quality-adjusted $/M)$0.5187/M
Cost per GPT-4-equivalent token. Lower = better value. Comparable across all models.
At or below SIT TPI
Value Ranking (by Cost / IQ)
Rank #359 of 581 micro models
← YOU ARE HERE | StepFun: Step 3.5 Flash
Data Sources
Source
Aggregator
1 source · updated recently
API Access
# Get this model's current price
curl https://api.inferenceindexer.ai/v1/models/stepfun/step-3.5-flash
# Response (truncated)
{ "model_id": "stepfun/step-3.5-flash", "name": "StepFun: Step 3.5 Flash", "blended_price_per_m": 0.22, "sit_adjusted_price": 0.518742 }