Buying guide

GPT 5.6-Sol vs DeepSeek V4.1-Flash 0910: which should you use?

Input$4.00$0.300
Output$20.00$1.20
Cached input$0.400$0.0060
Context window1,050K1,000K
Blended /1M$12.00$0.750

DeepSeek V4.1-Flash 0910 is the cheaper option per blended million tokens.

Pick 1 if
GPT 5.6-Sol

You need the highest benchmark scores and can absorb the higher per-token price.

Pick 2 if
DeepSeek V4.1-Flash 0910

You are optimizing for cost at scale and your workloads tolerate the score gap.

GPT 5.6-Sol leads on 9 of 16 shared benchmarks; DeepSeek V4.1-Flash 0910 is ~94% cheaper per blended million tokens.

DimensionGPT 5.6-SolDeepSeek V4.1-Flash 0910
GPQA Diamond94.1%90.9%
HLE44.5%36.8%
Codeforces (Rating)—3471
MathArena Apex—65.6%
Terminal-Bench 2.188.8%90.6%
Terminal-Bench 3.034.4%30%
Terminal-Bench 4.039.9%31.2%
DeepSWE v1.173%74.2%
ProgramBench23%20.3%
NL2Repo-Bench56.8%65.4%
CyberGym84.5%88.1%
SEC-Bench Pro74.3%62.8%
ExploitGym33.7%15.3%
HLE (w/tools)—63.9%
Automation-Bench45.8%54.8%
Agents' Last Exam26.7%31.8%
Chartography (w/tools)79.9%78.9%
BabyVision (w/tools)88.9%89.6%
ZeroBench-main (w/tools)53%49%
Blended price$12.00 /1M$0.750 /1M
Full priceInput · Output · Cached input$4.00 · $20.00 · $0.400$0.300 · $1.20 · $0.0060
Context window1,050K1,000K

What your usage would cost

Adjust the monthly volume — every model recomputes instantly.

GPT 5.6-Sol
$360/mo
DeepSeek V4.1-Flash 0910
$24.00/mo

Estimates use list prices and ignore cached input, batch discounts, and off-peak rates.

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