DeepSeek V3.1 vs Step 3.7 Flash.
model vs model · prices as of
Step 3.7 Flash takes 3 of 5 rounds against DeepSeek V3.1. Both cost $1.40 per million tokens to run.
DeepSeekDeepSeek V3.1
$1.40/M tokens
cheapest we can explain, at TensorX · $0.168 per 1,000 pages
164k context · tool calling · open weights
StepFunwins 3 roundsStep 3.7 Flash
$1.40/M tokens
cheapest we can explain, at Nous Portal · $0.151 per 1,000 pages
256k context · tool calling · reads images · open weights
List price in (lower wins)
$0.25/M
$0.18/M
List price out (lower wins)
$0.95/M
$1.11/M
Cheapest we can explain (lower wins)
$1.40/M at TensorX
$1.40/M at Nous Portal
Standard price (lower wins)
$1.70/M
$1.67/M
Cost per 1,000 pages (lower wins)
$0.168
$0.151
Context
164k tokens
256k tokens
Open weights
yes
yes
Tool calling
yes
yes
Structured output
yes
not stated
Reads images
no
yes
Reasoning
yes
yes
Released
21 Aug 2025
29 May 2026
Providers selling it
12
18
Price we measure against
OpenRouter
the maker's own
Trains on your prompts (no is better)
not stated
not stated
Providers selling both · 5
Nous Portal$1.70 / $1.40
DeepInfra$1.70 / $1.75
OpenRouter$1.70 / $1.75
Kilo Gateway$1.81 / $1.75
Novita$1.81 / $1.75
DeepSeek V3.1 then Step 3.7 Flash, per million tokens
Go further
Add a third or fourth model, or switch the weighting, in the tool.
What moved in the last seven days
- DeepSeek V3.1Nous Portal$0.20 / $0.76 $0.25 / $0.9525% dearer ·
- Step 3.7 FlashNous Portal$0.13 / $0.74 $0.16 / $0.9225% dearer ·
Frequently asked
- Which is cheaper, DeepSeek V3.1 or Step 3.7 Flash?
- Neither: both run at $1.40 per million tokens, three parts input to one part output, read on 16 Sept 2026.
- Where is each one cheapest?
- DeepSeek V3.1: $1.40 at TensorX. Step 3.7 Flash: $1.40 at Nous Portal.
- Can I buy both from one provider?
- Yes. 5 providers sell both: Nous Portal, DeepInfra, OpenRouter, Kilo Gateway, Novita. The cheapest of them for the two together is Nous Portal.
- Which holds more context?
- Step 3.7 Flash, at 256k tokens against 164k.
Prices exclude tax and are per million tokens, read 16 Sept 2026 from each provider's own catalog. The standard price blends three parts input to one part output; a page is 600 tokens in and 60 out. Bars are scaled to the larger value in each row.