Skip to main content
Models/StepFun/Step 3

Step 3

StepFun 🧠 Language Model

StepFun's frontier reasoning model, top-tier performance on math, code, and complex reasoning tasks. 66K context.

⏹ Retired

Specifications

Input modalitiestext
Output modalitiestext
Capabilitiestools, reasoning
Relative speed●●○○○ Relaxed
Deprecated on2026-07-23
Context window66,000 tokens
Max output16,384 tokens
Vision inputNo
Tool callingYes
Streaming outputYes
Input price$0.3675 / 1M
Output price$0.9625 / 1M

Pricing

$0.3675 / 1M input tokens  ·  $0.9625 / 1M output tokens

Platform credit pricing — live rates on the Models page.

More from StepFun

S
Step 3.7 Flash
StepFun's multimodal flagship reasoning model.
🧠 Language Model
S
Step 3.5 Flash
StepFun's latest reasoning model, 196B MoE (11B active), 256K context, open-source Apache 2.0. Fast agentic intelligence with strong code and math.
🧠 Language Model
S
Step 2 Mini
StepFun's compact text model, fast and cost-efficient with strong code ability. 32K context.
🧠 Language Model
S
Step 1o Turbo Vision
StepFun's vision-language reasoning model, accepts text and images with extended thinking for complex visual analysis.
🧠 Language Model