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About

MiniMax M3.1 Flash is a hosted large language model for developers building coding assistants, AI agents, and software applications. Available through MiniMax’s API and MiniMax Code, it accepts text, image, and video input and generates text responses. Documented uses include code generation and debugging, multi-step reasoning, tool use, codebase and document analysis, and computer-use workflows. The API offers a context window of up to 1 million tokens, adjustable reasoning effort, and OpenAI-compatible and Anthropic-compatible request formats. Usage is billed by input, output, and cached-input tokens. MiniMax provides documentation for API integration and model use. M3.1 Flash is available through the hosted API, M Plan, and MiniMax Code; model weights are planned for a later release.

About

Step 5 Preview is StepFun’s flagship model for agentic work, designed for real-world tasks across software engineering and professional knowledge work, with particular strength in finance. It natively supports text, image, and video input and provides a 1M-token context window, enabling tasks that require large amounts of information, tool calls, and continuous progress toward a deliverable. The model can analyze long documents, multiple source materials, and conversation history for cross-document question answering and research organization. For programming and software engineering, it works across multiple languages and can support troubleshooting, code changes, verification, and test creation. Its multi-step agent capabilities let applications provide tools for retrieving information, processing documents, conducting deep research, and producing analytical reports. Multimodal understanding combines images, video, and text for chart analysis, screenshot question answering, etc.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Software developers and organizations building coding assistants, AI agents, and applications that use a hosted language model.

Audience

Developers, engineering teams, and knowledge-work organizations wanting to build multimodal AI agents for coding, research, analysis, and other complex multi-step tasks

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$0.15/1M input tokens
Input: $0.15 per 1 million tokens; output: $0.60 per 1 million tokens; cached input: $0.015 per 1 million tokens. Standard pay-as-you-go billing in USD, based on token usage.
Free Version Not Supported
Free Trial Not Supported

Pricing

$0.04 per input
Free Version Not Supported
Free Trial Not Supported

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

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Pros & Cons from Real Users

Pros

  • It feels noticeably faster than M3 while still being strong enough for coding, research, computer-use tasks, and longer agent workflows. The 1M-token context window is a big advantage too. I can keep large repos, long documents, screenshots, video context, and a lot of prior agent history in the same session without constantly trimming things down. The pricing is probably the best part. At $0.15 per million input tokens and $0.60 per million output tokens, I can run it heavily without worrying that every agent loop is getting expensive. I also like how much MiniMax improved the agent side. M3.1 Flash is aimed at real multi-step work across coding, enterprise automation, computer use, and even cybersecurity, rather than just fast chat responses.

Cons

  • The main downside is that reasoning is always enabled, so it is not quite as lightweight as a pure instant-response model for trivial tasks.

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

MiniMax
Founded: 2022
China
www.minimax.io/blog/minimax-m31f

Company Information

StepFun
Founded: 2023
United States
platform.stepfun.ai/docs/en/guides/models/step-5-preview

Alternatives

Alternatives

MiniMax M3

MiniMax M3

MiniMax
Qwen3.5

Qwen3.5

Alibaba
GPT-6.1 Sol

GPT-6.1 Sol

OpenAI
Mistral Large 4

Mistral Large 4

Mistral AI
MiniMax M3

MiniMax M3

MiniMax
MiniMax M1

MiniMax M1

MiniMax
Seed2.1 Turbo

Seed2.1 Turbo

ByteDance

Categories

AI Coding Models Supported
AI Models Supported
Foundation Models Supported
Multimodal Models Supported

Categories

AI Models Supported
Multimodal Models Supported

Integrations

Cline Supported
ClinePass Supported
Hermes Agent Supported
Model Context Protocol (MCP) Supported
Ollama Supported
OpenClaw Supported
APIFree Supported
Alibaba Cloud Not Supported
Happy Shrimp 1.0 Not Supported
MiniMax Agent Supported
MiniMax Code Supported
MiniMax Mavis Supported
Novita AI Not Supported
OfoxAI Not Supported
OpenCode Zen Supported
Qwen Studio Not Supported
QwenCloud Not Supported
Roo Code Supported
Tabbit Browser Supported
Vision Agents Supported

Integrations

Cline Supported
ClinePass Supported
Hermes Agent Supported
Model Context Protocol (MCP) Supported
Ollama Supported
OpenClaw Supported
APIFree Not Supported
Alibaba Cloud Supported
Happy Shrimp 1.0 Supported
MiniMax Agent Not Supported
MiniMax Code Not Supported
MiniMax Mavis Not Supported
Novita AI Supported
OfoxAI Supported
OpenCode Zen Not Supported
Qwen Studio Supported
QwenCloud Supported
Roo Code Not Supported
Tabbit Browser Not Supported
Vision Agents Not Supported
Claim MiniMax M3.1 Flash and update features and information
Claim MiniMax M3.1 Flash and update features and information
Claim Step 5 Preview and update features and information
Claim Step 5 Preview and update features and information