GPT-5.6 Sol vs DeepSeek V4 Pro 0423
Closed flagship against the open-weight challenger that undercuts it dramatically on price.
Figures as of , read live from the model registry Zeplik bills against.
What the numbers say
- DeepSeek V4 Pro 0423 is about 6.3x cheaper on output tokens (38.4 vs 240 credits per 1M).
- GPT-5.6 Sol accepts images; DeepSeek V4 Pro 0423 is text-only.
- GPT-5.6 Sol is the newer release (July 2026 vs April 2026).
Derived from the live registry Zeplik routes and bills against. Credits: 1 credit = $0.10, computed from the raw provider rate with a 1.20x margin.
Side by side
GPT-5.6 Sol
OpenAI
GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series.
- Provider
- OpenAI
- Context window
- 1.1M tokens
- Input price
- 48.0 credits / 1M tokens ($4.00 raw)
- Output price
- 240 credits / 1M tokens ($20.00 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
DeepSeek V4 Pro 0423
DeepSeek
DeepSeek V4 Pro is a large-scale Mixture-of-Experts model from DeepSeek with 1.6T total parameters and 49B activated parameters, supporting a 1M-token context window.
- Provider
- DeepSeek
- Context window
- 1.0M tokens
- Input price
- 19.2 credits / 1M tokens ($1.60 raw)
- Output price
- 38.4 credits / 1M tokens ($3.20 raw)
- Vision (image input)
- No
- Tool calling
- Yes
- Extended reasoning
- No
Best for
- Everyday chat and drafting on an open-weight model with transparent lineage
- Very long documents and codebases: a 1.0M-token window fits entire books or repositories in one conversation
- 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 DeepSeek V4 Pro 0423 in the same chat, so you can switch mid-conversation and compare answers on the work you actually do.
Frequently asked questions
- What is the difference between GPT-5.6 Sol and DeepSeek V4 Pro 0423?
- DeepSeek V4 Pro 0423 is about 6.3x cheaper on output tokens (38.4 vs 240 credits per 1M). GPT-5.6 Sol accepts images; DeepSeek V4 Pro 0423 is text-only. GPT-5.6 Sol is the newer release (July 2026 vs April 2026).
- Is GPT-5.6 Sol or DeepSeek V4 Pro 0423 cheaper?
- DeepSeek V4 Pro 0423 is cheaper: 38.4 credits per million output tokens against 240. 1 credit = $0.10, computed from the raw provider rate with a 1.20x margin.
- Which has the larger context window, GPT-5.6 Sol or DeepSeek V4 Pro 0423?
- GPT-5.6 Sol, at 1.1M tokens against 1.0M.
- Can I use both GPT-5.6 Sol and DeepSeek V4 Pro 0423 on Zeplik?
- Yes. Zeplik is a multi-model chat, so both sit behind one account and you can switch between them mid-conversation to compare answers on your own prompt.
- Do GPT-5.6 Sol and DeepSeek V4 Pro 0423 need a paid plan?
- Both need a paid plan (Plus or above). Usage is then billed in credits from your monthly allowance.
Related comparisons
- GPT-6 Sol vs GPT-5.6 SolThe generational swap that also halves the bill: GPT-6 Sol replaces GPT-5.6 Sol at $2 in and $10 out, half what the model it supersedes now asks, on the same 1,050,000-token window.
- Claude Opus 5.5 vs DeepSeek V4 Pro 0423Anthropic's premium reasoning tier against the open-weight model that answers for a fraction of the output price, and cannot read an image at all.
- GPT-6 Astra vs GPT-5.6 SolThe upgrade decision almost every OpenAI user is actually making: GPT-6 Astra costs two and a half times GPT-5.6 Sol per token for the same 1,050,000-token window, so the question is which work is hard enough to need it.
- GPT-6 Astra vs DeepSeek V4 Pro 0423The most expensive closed flagship against the open-weight model that answers for about a thirtieth of the output price -- and the vision gap that comes with it.
- GPT-5.6 Sol vs Claude Sonnet 5The two defaults most people actually choose between: OpenAI's mainstream flagship against Anthropic's balanced current generation.
- Claude Sonnet 5 vs DeepSeek V4 Pro 0423Anthropic's flagship against the strongest open-weight alternative for a fraction of the cost.
Explore Zeplik
- 468 AI skillsReady-to-run expert methods that run on GPT-5.6 Sol, DeepSeek V4 Pro 0423 or any other model.
- 997 integrationsConnect Gmail, Slack, GitHub, Notion and hundreds more so the assistant can work in your apps.
- Simple pricingPlus, Pro and Max plans with a monthly credit allowance that works across every model.