Kimi K3 vs GPT-5 Nano
Compare Kimi K3 and GPT-5 Nano side-by-side. See comparisons of price, response speed, accuracy, and file support to choose the best model for your task.
Overview
Kimi K3 vs GPT-5 Nano Overview
Everything you need to know about these AI models, including capabilities, performance, pricing, and technical details.
Kimi / Kimi K3
proDescription
Kimi K3 is Moonshot AI's newest and most capable model, released in July 2026. At 2.8 trillion parameters, it's the largest open model anyone has shipped so far, and it can hold about a million tokens in memory at once. That's enough room for an entire codebase or a full stack of long documents in a single chat. It comes in two versions: K3 Max for everyday chat and coding, and K3 Swarm Max, which splits one big job across many copies of the model working in parallel.
Where K3 really earns its keep is coding. It's good at finding its way around large projects, making changes that touch many files, and fixing bugs by reading your actual test results and error logs instead of guessing. You can also share screenshots, diagrams, and error messages as images, and it will answer based on what's actually on the screen.
In early testing, K3 beats Claude Opus 4.8 and GPT-5.5 on several coding tests while costing far less to run. It still sits a step below Claude Fable 5 and GPT-5.6 Sol overall, so for the very hardest questions you may get a better answer from one of those. On Aymo, switching between them takes one click.
OpenAI / GPT-5 Nano
lightDescription
OpenAI's smallest and cheapest GPT-5 model, built for speed above all. GPT-5 Nano is made for summarisation, classification, and other well-defined tasks that run at high volume. It reads text and images, with adjustable reasoning effort. Reasoning depth is shallow by design and its knowledge is dated. The trade is cost: it is among the cheapest models in the catalog.
About
About
Capabilities
Capabilities
Comparison
Why Use Kimi K3 and GPT-5 Nano?
Aymo gives you more than access to individual models—it provides a complete multi-model AI workspace designed for productivity.
Kimi / Kimi K3
proBuilt for Real Coding Work
It handles changes across many files, sticks with a task through hundreds of steps, and fixes bugs by reading your test output and logs.
Big jobs, split up for you
Give it something too large for one pass, like reviewing a folder of contracts, and it breaks the work into pieces and handles them side by side.
Longer Context Window
1M token window for full codebases, contracts, and research corpora
Parallel Research Tasks
Run several research threads at once through coordinated sub-agents, useful for broad, exploratory investigation.
Web Search Tool
Moonshot provides web search as an official tool in the Kimi API, so the model can ground answers in live sources rather than working only from what it learned in training.
Native Image Support
Share a screenshot, a diagram, or an error message and get an answer based on what's actually in the image.
OpenAI / GPT-5 Nano
lightCoding Sub-Tasks
Suited to small, well-scoped coding jobs and to acting as a fast sub-agent inside a larger system, rather than tackling whole problems. Reasoning depth is limited, so keep the scope tight.
Adjustable Reasoning Effort
Reasoning effort runs from minimal through low, medium, and high. Even at higher effort it is a shallow reasoner by design, so it suits speed-sensitive work rather than hard multi-step problems.
Room For Long Documents
A large context window, enough to summarise long reports or classify big batches of text in a single pass without splitting the input into separate requests.
Summarisation And Classification
OpenAI names summarisation and classification as its core uses. Built to process high volumes of text quickly and cheaply rather than to produce polished long-form writing.
Analysis On Older Knowledge
Its training data is dated by current standards, so it is fine for processing text you supply but weaker on recent events, which need live sources rather than the model's own knowledge.
Text And Image Input
Reads text and images, so you can send screenshots or scanned pages alongside your prompt. Output is text only. OpenAI states audio and video are not supported.
Why Aymo
Why chat with Kimi K3 and GPT-5 Nano on Aymo AI?
Aymo gives you more than access to Kimi K3 and GPT-5 Nano—it provides a complete multi-model AI workspace designed for productivity.
Compare Responses
See how Kimi K3 and GPT-5 Nano performs alongside Claude, Gemini, Grok, and other leading AI models.
One Workspace
Keep all your AI conversations, files, and prompts in a single organized workspace.
Switch Models Instantly
Move between different AI models without restarting your conversation.
Upload Once
Use the same files across multiple AI models without uploading them again.
Save & Organize
Bookmark important chats, organize projects, and return anytime.
Work Together
Share conversations and collaborate with teammates in one place.