WhichAI.todayDeepSeek V4.1 Flash
DeepSeek
Pick this when the messages cannot leave your own machines.
Skip the hosted chat for private data. The weights can be run on your own machines.
AA Intelligence Index 45.
DeepSeek V4.1 Flash vs Gemini 3.5 Flash-Lite
Updated Nov 13, 2026. Checked daily.
The short answer
Gemini 3.5 Flash-Lite ranks ahead in every job we track where either appears (speed & high volume).
DeepSeek V4.1 Flash
0 of 1 job ahead
Free (limited)
Gemini 3.5 Flash-Lite
1 of 1 job ahead
Free (limited)
Head to head, job by job
Each job ranks a #1, an alternative, and an open-weights pick from public leaderboards. Bars compare the two scores on that job's own signal.
DeepSeek V4.1 FlashGemini 3.5 Flash-Lite
Which one should you pick?
Gemini 3.5 Flash-Lite
Pick this when you need high volume and a miss is cheap.
Skip it for hard coding, legal reading, or anything where a miss is expensive.
Artificial Analysis output speed 412 tokens/sec (Oct 2026).
Price, access, and privacy
DeepSeek V4.1 FlashGemini 3.5 Flash-Lite
Cost
Chat is free. The API costs a fraction of a dollar per million tokens, with 50% discounts off-peak.
Free API tier with rate limits. Paid API is $0.30 per million input tokens and $2.50 per million output.
Free tier
Yes. The chat site and app are free, with throttling when the service is busy.
Yes. Free API use can be used to improve Google products. The paid API tier is not.
Where to get it
Trains on chats
Possibly. DeepSeek says some optimization data can come from user input, after de-identification. Use the opt-out described in the DeepSeek privacy policy.
Yes for adults. Gemini Apps Activity is on by default, and those chats can be used to improve Google AI. Gemini Apps Activity, turn off Keep Activity. Safety review can still apply.
Released
Before our release log began.
Before our release log began.
Try both with the same prompt
DeepSeek V4.1 Flash
Tag each row as yes or no, and keep the output to a single column.
Gemini 3.5 Flash-Lite
Classify each of these support messages as billing, bug, or other, one label per line.
Want a sharper prompt? Build one for either model.
Ranking history
- Oct 23, 2026. Gemini 3.5 Flash-Lite is the first leader on record. Artificial Analysis output speed 412 tokens/sec (Oct 2026).
Questions
Is DeepSeek V4.1 Flash or Gemini 3.5 Flash-Lite better for speed & high volume?
Gemini 3.5 Flash-Lite ranks ahead for speed & high volume on Artificial Analysis output speed. DeepSeek V4.1 Flash is the open weights pick; Gemini 3.5 Flash-Lite is the #1 pick (412).
Which is cheaper, DeepSeek V4.1 Flash or Gemini 3.5 Flash-Lite?
DeepSeek V4.1 Flash: Chat is free. The API costs a fraction of a dollar per million tokens, with 50% discounts off-peak. Gemini 3.5 Flash-Lite: Free API tier with rate limits. Paid API is $0.30 per million input tokens and $2.50 per million output.
Can I use DeepSeek V4.1 Flash or Gemini 3.5 Flash-Lite for free?
DeepSeek V4.1 Flash: Yes. The chat site and app are free, with throttling when the service is busy. Gemini 3.5 Flash-Lite: Yes. Free API use can be used to improve Google products. The paid API tier is not.
Which is more private, DeepSeek V4.1 Flash or Gemini 3.5 Flash-Lite?
DeepSeek V4.1 Flash (DeepSeek): Possibly. DeepSeek says some optimization data can come from user input, after de-identification. Gemini 3.5 Flash-Lite (Google): Yes for adults. Gemini Apps Activity is on by default, and those chats can be used to improve Google AI.