GPT-5.6 Sol vs Grok Build 0.1
OpenAI's generalist flagship against a purpose-built coding model.
What the numbers say
- Grok Build 0.1 is about 15x cheaper on output tokens (22.0 vs 330 credits per 1M).
- GPT-5.6 Sol takes noticeably more context: 1.1M vs 256K tokens.
- GPT-5.6 Sol is the newer release (July 2026 vs May 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
GPT-5.6 Sol
OpenAI
GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. It is suited for complex reasoning, coding, and agentic workflows, and is particularly strong at command-line and multi-step coding tasks...
- Provider
- OpenAI
- Context window
- 1.1M tokens
- Input price
- 55.0 credits / 1M tokens ($5.00 raw)
- Output price
- 330 credits / 1M tokens ($30.00 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 1.1M-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
Grok Build 0.1 is xAI’s fast coding model trained specifically for agentic software engineering workflows. It supports text and image inputs with text output, and is optimized for interactive coding...
- Provider
- xAI
- Context window
- 256K tokens
- Input price
- 11.0 credits / 1M tokens ($1.00 raw)
- Output price
- 22.0 credits / 1M tokens ($2.00 raw)
- Vision (image input)
- Yes
- Tool calling
- Yes
- Extended reasoning
- No
Best for
- Writing, reviewing and refactoring code; agentic coding workflows
- Long documents: the 256K-token window holds lengthy reports, contracts or papers whole
- 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 GPT-5.6 Sol and Grok Build 0.1 in the same chat, so you can switch mid-conversation and compare answers on the work you actually do.