Kimi K2 Thinking

Kimi K2 Thinking

Moonshot AI
Solar Pro 4

Solar Pro 4

Upstage
+
+

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About

Kimi K2 Thinking is an advanced open source reasoning model developed by Moonshot AI, designed specifically for long-horizon, multi-step workflows where the system interleaves chain-of-thought processes with tool invocation across hundreds of sequential tasks. The model uses a mixture-of-experts architecture with a total of 1 trillion parameters, yet only about 32 billion parameters are activated per inference pass, optimizing efficiency while maintaining vast capacity. It supports a context window of up to 256,000 tokens, enabling the handling of extremely long inputs and reasoning chains without losing coherence. Native INT4 quantization is built in, which reduces inference latency and memory usage without performance degradation. Kimi K2 Thinking is explicitly built for agentic workflows; it can autonomously call external tools, manage sequential logic steps (up to and typically between 200-300 tool calls in a single chain), and maintain consistent reasoning.

About

Solar Pro 4 is an agentic AI model built to carry real work to the finish: reading documents, running tools, producing deliverables, and stopping when the evidence runs out. It targets longer, more complex workloads that move across multiple documents, execute tasks in a terminal, and chain tool calls over many steps. The model supports a 512K context window with up to 128K output tokens, allowing agents to load contracts, reports, and data files into a single session without splitting them. It handles English, Korean, and Japanese for both input and output, while adjustable reasoning effort lets users choose deeper analysis or faster, real-time interaction. Solar Pro 4 is designed to stay accurate through long documents, multi-turn tool use, and terminal tasks, and to preserve values and conclusions across sequential deliverables such as Excel workbooks, reports, and slide decks.

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 and AI research teams seeking a solution for building autonomous agents, multi-step reasoning systems and tool-enabled workflows

Audience

Developers and organizations seeking to run complex AI agent workflows across documents, tools, terminals, and multi-step business tasks with verifiable outputs

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

Free
Open source
Free Version
Free Trial

Pricing

$0.03 per 1M tokens
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

Moonshot AI
Founded: 2023
United States
moonshotai.github.io/Kimi-K2/thinking.html

Company Information

Upstage
Founded: 2020
United States
www.upstage.ai/blog/en/solar-pro-4

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Categories

Categories

Integrations

GPT-5.1
GPT-5.1 Instant
GPT-5.1 Thinking
GPT-5.2 Instant
GPT-5.2 Pro
GPT-5.2 Thinking
GPT-5.4 Pro
GPT-5.4 nano
GPT-5.5
GPT-5.5 Pro
GPT-5.6 Sol
GPT-5.6 Sol Ultrafast
GPT‑5.4 Thinking
Hermes Agent
OpenAI
OpenClaw
OpenRouter
Shiori
Upstage AI
Zo Computer

Integrations

GPT-5.1
GPT-5.1 Instant
GPT-5.1 Thinking
GPT-5.2 Instant
GPT-5.2 Pro
GPT-5.2 Thinking
GPT-5.4 Pro
GPT-5.4 nano
GPT-5.5
GPT-5.5 Pro
GPT-5.6 Sol
GPT-5.6 Sol Ultrafast
GPT‑5.4 Thinking
Hermes Agent
OpenAI
OpenClaw
OpenRouter
Shiori
Upstage AI
Zo Computer
Claim Kimi K2 Thinking and update features and information
Claim Kimi K2 Thinking and update features and information
Claim Solar Pro 4 and update features and information
Claim Solar Pro 4 and update features and information