Step 3.5 Flash
Chat modelStep 3.5 Flash
Step 3.5 Flash is an AI model published by StepFunAI, released on 2026-02-02, for Chat model, with 196B parameters, and 256K context length, requiring about 399GB storage, under the Apache 2.0 license, with a 99.80 score on AIME2025.
Data sourced primarily from official releases (GitHub, Hugging Face, papers), then benchmark leaderboards, then third-party evaluators. Learn about our data methodology
Model basics
Open source & experience
Official resources
API details
Benchmark Results
Step 3.5 Flash currently shows benchmark results led by AIME2025 (6 / 106, score 99.80), LiveCodeBench (13 / 120, 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.
Coding and Software Engineer
2 evaluationsMath and Reasoning
4 evaluationsClaw-style Agent Evaluation
2 evaluationsCompare with other models
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Publisher
Model Overview
Step 3.5 Flash is an AI model published by StepFunAI, released on 2026-02-02, for Chat model, with 196B parameters, and 256K context length, requiring about 399GB storage, under the Apache 2.0 license, with a 99.80 score on AIME2025.
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