Compare · updated 2026-11-01

GPT-6.1 Sol vs DeepSeek Flash

GPT-6.1 Sol is better at writing, coding, reasoning, maths; DeepSeek Flash is better at structured data, translation. DeepSeek Flash is the cheaper of the two on output.

Measured quality by task

Quality is Nivana’s measured score for each kind of task, from weekly pairwise evals judged by models from several labs. Prices are live AI Gateway list prices per million tokens. Updated 2026-11-01. How this is measured.

Price and context

Which should you use?

Use the one that wins the kind of work you do most, unless the price gap outweighs the quality gap for easy requests. Or don’t choose: Nivana scores both, and the rest of the pool, on every request and sends it to whichever is best for that request.

Questions

Is GPT-6.1 Sol better than DeepSeek Flash?

On Nivana’s weekly evals GPT-6.1 Sol scores higher on 4 of 8 task types (writing, coding, reasoning, maths) and DeepSeek Flash on 2 (structured data, translation). Neither is better at everything.

Which is better for coding, GPT-6.1 Sol or DeepSeek Flash?

GPT-6.1 Sol: 93/100 against 85/100 for DeepSeek Flash on Nivana’s coding evals.

Which is better for writing, GPT-6.1 Sol or DeepSeek Flash?

GPT-6.1 Sol: 93/100 against 87/100 for DeepSeek Flash on Nivana’s writing evals.

Which is cheaper, GPT-6.1 Sol or DeepSeek Flash?

DeepSeek Flash: $1.2 per million output tokens against $10 for GPT-6.1 Sol, about 8.3× less. A typical chat answer costs about $0.0013 on DeepSeek Flash and $0.010 on GPT-6.1 Sol.