Grok 4.3 Model to process million-token documents and large codebases
xAI Chat and reasoning models Upgrade to use x-ai/grok-4.3
Grok 4.3 is xAI’s long-context chat and reasoning model with a million-token context window and multimodal inputs. It is for teams that need sustained reasoning over large codebases, long documents, or files and video inputs at lower per-message cost.
What it can do
- Reads images and screenshots
- Searches the live web and cites sources
- Reads PDFs and documents
- Thinks step by step on hard questions
What people use it for
Audit and summarize large contracts
Ingest full contract sets, annotate key clauses, and produce a concise risk memo that cites exact document sections. Grok 4.3 keeps the entire document context in one session so summaries and clause comparisons stay consistent.
Analyze and refactor large codebases
Load multiple source files and ask for cross-file bugs, dependency maps, or suggested refactors. The model’s very large context lets it trace symbols and references across many files without dropping earlier code.
Process multimodal evidence packages
Upload images, screenshots, and short video clips alongside transcripts to extract timelines, speaker attributions, and object mentions. Grok 4.3 handles text plus image and short video inputs for a single consolidated analysis.
Why it is worth it
- Million-token context window for uninterrupted multi-document work.
- Built-in reasoning mode for step-by-step explanations and citations where available.
- Supports images and short video plus file generation (PDF, PPTX, XLSX) for finished deliverables.
- Lower per-message cost on Katteb for high-volume long-context usage.
Questions people ask
What kinds of files and media can Grok 4.3 handle?
Grok 4.3 accepts text, images and short video inputs and can produce files such as PDF, PPTX and XLSX when integrated through a platform. This makes it suitable for multi-file reports and evidence packages.
Why pick Grok 4.3 instead of a smaller-context model?
Use Grok 4.3 when you need consistent reasoning across very long inputs. large codebases, multi-document contracts, or long transcripts. because its million-token window keeps context available in a single conversation. It is also often chosen where per-request cost matters.
How is billing handled on Katteb for this model?
On Katteb Chat you switch to x-ai/grok-4.3 in the model picker and are billed per message in credits. Grok 4.3 access through Katteb costs 7 credits per message. Katteb bills actual usage per message rather than a flat rate.
