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About

GPT-5.5 Thinking is an advanced AI capability from OpenAI designed to handle complex, multi-step tasks with greater intelligence and autonomy. It enables users to provide high-level instructions while the model plans, executes, and refines tasks independently. The system excels in areas such as coding, research, data analysis, and document creation. It can navigate across tools, check its own work, and adapt to ambiguous or incomplete inputs. GPT-5.5 Thinking is optimized for both speed and efficiency, delivering high-quality outputs while using fewer computational resources. It also supports long-context understanding, allowing it to process large datasets and extended workflows. Strong safeguards are built in to ensure responsible and secure usage. Overall, it represents a shift toward more autonomous, agent-like AI that can complete real-world tasks end-to-end.

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
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Developers, researchers, and professionals who need an advanced AI system capable of handling complex, multi-step tasks with high accuracy and autonomy

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
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

No information available.
Free Version
Free Trial

Pricing

$0.04 per input
Free Version
Free Trial

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:

Review this Software

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:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

OpenAI
Founded: 2015
United States
openai.com

Company Information

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

Alternatives

Alternatives

No Alternatives
Claude Mythos

Claude Mythos

Anthropic
Claude Opus 4.7

Claude Opus 4.7

Anthropic
GPT-5.5 Pro

GPT-5.5 Pro

OpenAI
Claude Fable 5

Claude Fable 5

Anthropic

Categories

Categories

Integrations

Alibaba Cloud
ChatGPT Agent
ChatGPT Images
ChatGPT Plus
ChatGPT Pro
Cherry Studio
ClinePass
GPT-5.5
GPT-5.6 Luna
Hermes Agent
Hugging Face
ModelScope
Novita AI
OfoxAI
Ollama
OpenClaw
Qwen
Qwen Code
Qwen Studio
QwenCloud

Integrations

Alibaba Cloud
ChatGPT Agent
ChatGPT Images
ChatGPT Plus
ChatGPT Pro
Cherry Studio
ClinePass
GPT-5.5
GPT-5.6 Luna
Hermes Agent
Hugging Face
ModelScope
Novita AI
OfoxAI
Ollama
OpenClaw
Qwen
Qwen Code
Qwen Studio
QwenCloud
Claim GPT-5.5 Thinking and update features and information
Claim GPT-5.5 Thinking and update features and information
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Claim Step 5 Preview and update features and information