Grok 4.5 vs Grok 4.3
The newest Grok against its predecessor.
What the numbers say
- Grok 4.3 is about 2.4x cheaper on output tokens (27.5 vs 66.0 credits per 1M).
- Grok 4.3 takes noticeably more context: 1M vs 500K tokens.
- Grok 4.5 is the newer release (July 2026 vs April 2026).
Derived from the live registry Zeplik routes and bills against. Credits: 1 credit = $0.10, raw provider rate with a 1.10x margin.
Side by side
Grok 4.5
xAI
Grok 4.5 is SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.
- Provider
- xAI
- Context window
- 500K tokens
- Input price
- 22.0 credits / 1M tokens ($2.00 raw)
- Output price
- 66.0 credits / 1M tokens ($6.00 raw)
- Vision (image input)
- Yes
- Tool calling
- Yes
- Extended reasoning
- No
Best for
- Hard problems where answer quality matters more than cost: strategy, analysis, difficult writing
- Very long documents and codebases: a 500K-token window fits entire books or repositories in one conversation
- Working with images: screenshots, charts, photos and scanned documents alongside text
- Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows
Grok 4.3
xAI
Grok 4.3 is a reasoning model from xAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual...
- Provider
- xAI
- Context window
- 1M tokens
- Input price
- 13.8 credits / 1M tokens ($1.25 raw)
- Output price
- 27.5 credits / 1M tokens ($2.50 raw)
- Vision (image input)
- Yes
- Tool calling
- Yes
- Extended reasoning
- No
Best for
- Balanced everyday work: writing, questions, brainstorming and summarization
- Very long documents and codebases: a 1M-token window fits entire books or repositories in one conversation
- Working with images: screenshots, charts, photos and scanned documents alongside text
- Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows
Try both on Zeplik
The honest answer to most model debates is to run your own prompt on both. Zeplik puts Grok 4.5 and Grok 4.3 in the same chat, so you can switch mid-conversation and compare answers on the work you actually do.