Step 3.5 Flash
Step 3.5 Flash is an AI model published by StepFunAI, released on 2026-02-02, for AI model, with 1960.0B parameters, and 256K tokens context length, requiring about 399GB storage, under the Apache 2.0 license.
Data sourced primarily from official releases (GitHub, Hugging Face, papers), then benchmark leaderboards, then third-party evaluators. Learn about our data methodology
| Modality | Input | Output |
|---|---|---|
| Text | 0.0 | 0.0 |
| Modality | Input cache | Output cache |
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| Text | 0.0 | -- |
| Modality | Input | Output |
|---|---|---|
| Text | 0.0 | -- |
Step 3.5 Flash currently shows benchmark results led by AIME2025 (6 / 106, score 99.80), LiveCodeBench (11 / 118, score 86.40), τ²-Bench (5 / 40, score 88.20). This page also consolidates core specs, context limits, and API pricing so you can evaluate the model from benchmark results and deployment constraints together.
Step 3.5 Flash is an AI model published by StepFunAI, released on 2026-02-02, for AI model, with 1960.0B parameters, and 256K tokens context length, requiring about 399GB storage, under the Apache 2.0 license.
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