Modeldex

StepFun · Text line

Step

3 stages over 20 months, from Step 1 (32K) in Jan 2025 to Step 5 Preview in Sep 2026.

Evolution chamber01 / 03
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
Ready to evolve

Every generation. A new possibility.

Step 1 (32K) · Jan 2025
View model : Step 1 (32K)

3 stages, from Step 1 (32K) (Jan 2025) to Step 5 Preview (Sep 2026). Press Evolve to watch each step.

How it grew

Context window

  1. 33Kv1
  2. 16Kv2
  3. 1.02Mv5

Max output

  1. 33Kv1
  2. 8Kv2
  3. 66Kv5

Output priceper 1M tokens, lower is better

  1. $9.59v1
  2. $16.44v2
  3. $2.70v5

Every stage

  1. v1 Stage 1

    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

  2. v2 Stage 2

    StepFun

    Step 2 (16K)

    CTX16K
    Tools
    TextInput$5.21/M
    TextOutput$16.44/M

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

    PaidProprietary468/1040

  3. v5 Stage 3

    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

More StepFun lines

Deck0/4
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