GPT-5.6 Sol vs GPT-5.6 Sol Pro

Sol against its Pro serving: same model family, more computation per answer.

Figures as of 19 September 2026, read live from the model registry Zeplik bills against.

What the numbers say

• Output pricing is close: 240 vs 240 credits per 1M tokens.
• Both take the same 1.1M-token context window.
• GPT-5.6 Sol Pro is the newer release (July 2026 vs July 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

Try GPT-5.6 Sol on Zeplik

The honest answer to most model debates is to run your own prompt. Of these two, GPT-5.6 Sol is the row Zeplik offers, so start there and switch models mid-conversation whenever you want a second read.

Frequently asked questions

What is the difference between GPT-5.6 Sol and GPT-5.6 Sol Pro?

Output pricing is close: 240 vs 240 credits per 1M tokens. Both take the same 1.1M-token context window. GPT-5.6 Sol Pro is the newer release (July 2026 vs July 2026).

Is GPT-5.6 Sol or GPT-5.6 Sol Pro cheaper?

They cost the same on output tokens: 240 credits per million each. 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 GPT-5.6 Sol Pro?

Neither: both take 1.1M tokens.

Can I use both GPT-5.6 Sol and GPT-5.6 Sol Pro 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 GPT-5.6 Sol Pro 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.
• 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-5.6 Sol vs Claude Sonnet 5The two defaults most people actually choose between: OpenAI's mainstream flagship against Anthropic's balanced current generation.
• GPT-5.6 Sol vs Claude Fable 5OpenAI's flagship against Anthropic's writing-and-reasoning specialist from the same release wave.
• GPT-5.6 Sol vs Claude Opus 4.8The head-to-head at the very top: each lab's premium tier on the hardest work.
• GPT-5.6 Sol vs Claude Opus 5The new head-to-head at the very top: OpenAI's flagship against Anthropic's million-token Opus 5 premium tier.