Modeldex
Drag to turnCard front showing

StepFunTextRare

Step 2 (16K)

StepFun flash model for efficient multimodal reasoning, coding, and tool use

step-2-16k
Type
Text
Quality
Not rated yet
Context window
16,384 tokens
Max output
8,192 tokens
Input price
$5.21 / 1M tokens
Output price
$16.44 / 1M tokens
Cache read
$1.04 / 1M tokens
Cache write
—
Released
Jan 1, 2025
Knowledge cutoff
Jun 2024
Takes in
Text
Puts out
Text
Reasoning
No
Tool calling
Yes
Structured output
No
File attachments
No
Access
Paid
License
Proprietary
Rarity
Rare
Set number
468/1040
Open StepFun docsWhere to run it 2Evolution 2/3Meet its creatureBattle Kimi K3

Weights aren’t public. Use is governed by StepFun’s terms. Specs from models.dev, last changed Oct 18, 2026. Official source: platform.stepfun.ai.

How good is it?

Public leaderboard scores for Step 2 (16K), refreshed daily from Epoch AI and LMArena.

No public leaderboard lists Step 2 (16K) yet. Epoch AI and LMArena cover most chat, image, and video models from the big labs; embeddings, speech, and small open models mostly go unrated.

Where to run it

2 providers sell Step 2 (16K) through an API. Prices are per million tokens, cheapest first.

API providers

ProviderInputOutputContext
StepFun (China)Cheapest paidstep-2-16k$5.21$16.4416K
StepFun (Global)Officialstep-2-16k$5.21$16.4416K

From models.dev and Hugging Face, checked daily. Resellers’ listings can lag behind their price pages, so confirm with the provider before you commit.

Face off

Current text models from other labs at a similar output price.

More from StepFun

StepFun

Step 5 Preview

CTX1.02M
Preview
83Quality
Reasoning · Vision · Tools
TextImageVideoInput$1/M
TextOutput$2.70/M

StepFun's next-generation flagship base model for coding and professional knowledge work, with native text, image, and video input and a 1M-token context window

PaidProprietary1006/1040
StepFun

Step 3.7 Flash

CTX256K
Reasoning · Vision · Tools
TextImageVideoInput$0.18/M
TextOutput$1.11/M

Newer StepFun flash model for faster agents, coding, and multimodal prompts

Open weightsApache 2.0910/1040
StepFun

StepAudio 2.5 ASR

CTX—
Speech to text
AudioInput—
TextOutput—

Speech transcription model for accurate audio-to-text and captioning workflows

PaidProprietary893/1040
StepFun

StepAudio 2.5 TTS

CTX—
Text to speech
TextInput—
AudioOutput—

Speech generation model for controllable voice, narration, and audio delivery

PaidProprietary871/1040
StepFun

Step 3.5 Flash 2603

CTX256K
Reasoning · Tools
TextInput$0.10/M
TextOutput$0.30/M

StepFun flash model for efficient multimodal reasoning, coding, and tool use

Open weightsApache 2.0853/1040
StepFun

Step TTS 2

CTX—
Text to speech
TextInput—
AudioOutput—

Speech generation model for controllable voice, narration, and audio delivery

PaidProprietary811/1040
StepFun

Step 3.5 Flash

CTX256K
64Quality
Reasoning · Tools
TextInput$0.10/M
TextOutput$0.30/M

StepFun flash lane for quick multimodal reasoning and coding assistance

Open weightsApache 2.0768/1040
StepFun

Step 1 (32K)

CTX33K
Tools
TextInput$2.05/M
TextOutput$9.59/M

StepFun flash model for efficient multimodal reasoning, coding, and tool use

PaidProprietary467/1040
Deck0/4
  1. Empty slot
  2. Empty slot
  3. Empty slot
  4. Empty slot