Grok 4.3 vs GPT-5.4 Nano
Compare Grok 4.3 and GPT-5.4 Nano side-by-side. See comparisons of price, response speed, accuracy, and file support to choose the best model for your task.
Overview
Grok 4.3 vs GPT-5.4 Nano Overview
Everything you need to know about these AI models, including capabilities, performance, pricing, and technical details.
xAI / Grok 4.3
proDescription
xAI's previous flagship, and still the Grok model with the largest context window. Grok 4.3 holds a million tokens, double what the newer generation offers. xAI positions it around a low hallucination rate, agentic tool calling, and instruction following. It reads text and images, searches the web and X, and lets you turn reasoning off entirely when speed matters more than depth.
OpenAI / GPT-5.4 Nano
proDescription
OpenAI's smallest and cheapest current-generation model, built for speed and volume. GPT-5.4 Nano excels at classification, data extraction, ranking, and coding sub-tasks, and works well as a fast sub-agent inside larger systems. It reads text and images, supports web search, and follows instructions reliably. Reasoning depth is shallow by design, traded for very low latency and cost at scale.
About
About
Capabilities
Capabilities
Comparison
Why Use Grok 4.3 and GPT-5.4 Nano?
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xAI / Grok 4.3
proAgentic Coding and Tool Calling
xAI positions this model on agentic tool-calling and instruction-following, which is what coding agents actually run on. Function calling and structured outputs are both supported natively.
Reasoning You Can Switch Off
Effort runs at none, low, medium, or high. None means no reasoning at all, so you can drop it entirely for simple work and pay only for the answer rather than the thinking.
Large Context Window
Handles a one million tokens, twice the window of the newer Grok generation. Load an entire repository or a large document set in one pass. Requests above 200,000 tokens are billed at a higher rate.
Low Hallucination
xAI leads its own description with non-hallucination rate and instruction-following, which matter most for writing that has to be accurate and stay within the brief you gave it.
Web Search and X Search
xAI states that Grok knows nothing beyond its training data and provides server-side Web Search and X Search tools to bridge the gap. X Search reaches posts and threads no other model can read.
Text and Image Input
xAI lists modalities as text and image in, text out. Send screenshots, diagrams, or scanned pages alongside your prompt. Audio and video are not listed as accepted inputs.
OpenAI / GPT-5.4 Nano
proCoding Sub-Agents
OpenAI positions it for coding sub-tasks and as a fast sub-agent in multi-model architectures. Built for small, well-scoped jobs run at high frequency rather than whole engineering problems.
Adjustable Reasoning Effort
Reasoning effort ranges from minimal to 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 Inputs
A large context window, enough to classify or extract from big batches of text in a single pass. Ample for the high-volume work it is built for without splitting the input.
Extraction And Ranking
OpenAI names classification, data extraction, and ranking as its core uses. Built to process structured, repetitive text work quickly and cheaply rather than to write long-form content.
Web Search For Current Facts
Supports web search as a tool, so it can pull live information into an answer. Useful in background and real-time systems where the data needs to be current.
Text And Image Input
Reads text and images, so you can send screenshots or scanned pages alongside your prompt. Output is text only. Audio and video are not supported.
Why Aymo
Why chat with Grok 4.3 and GPT-5.4 Nano on Aymo AI?
Aymo gives you more than access to Grok 4.3 and GPT-5.4 Nano—it provides a complete multi-model AI workspace designed for productivity.
Compare Responses
See how Grok 4.3 and GPT-5.4 Nano performs alongside Claude, Gemini, Grok, and other leading AI models.
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