Step 3.5 Flash 2603 pricing.
prices as of · 16 providers · 18 prices
StepFun's Step 3.5 Flash 2603 holds 256k tokens of context and has a reasoning mode. Open weights, so anyone may host it, which is why the prices below differ so much.
Step 3.5 Flash 2603 costs $0.10 in and $0.30 out per million tokens from StepFun; the cheapest price we can explain is $0.57 at Vercel AI Gateway, checked 16 Sept 2026.
StepFun list price
$0.60/M tokens
$0.10 in · $0.30 out
read · 83% below the market median
Cheapest price we can explain
$0.57/M tokens
$0.09 in · $0.30 out · 5% under list
Vercel AI Gatewayread
What it costs for your work
StepFun list price
$0.078a month
cheapest we can explain · Vercel AI Gateway
$0.072a month
difference
$0.006saved
A page is about 600 tokens in and 60 out, a support reply 200 in and 300 out, an email 150 in and 250 out. Nothing else is counted: no cache discount, no batch rate, no free tier.
Every provider selling Step 3.5 Flash 2603
Four groups, decided by the price and by what the provider publishes about it. Prices are per million tokens, and the share is that row against StepFun's price.
The maker's list price
1 priceWhat the lab that trained the model charges on its own API.
StepFunThe price StepFun charges for the model it trained. Every row below is measured against it.
$0.10 / $0.30in / out per M
1.00×of list price
Cheaper, and we know why
2 pricesBelow list, with a published reason: hosting the open weights, a regional price list, credits, a stated discount.
- Vercel AI Gateway
10% under the list price, an ordinary reseller margin.
262k context hereVercel AI Gateway ↗$0.09 / $0.30in / out per M
0.95×of list price
$0.09 / $0.30in / out per M
0.95×of list price
Same price as the maker
13 pricesThe same price the maker charges, sold by someone else.
$0.10 / $0.30in / out per M
1.00×of list price
$0.10 / $0.30in / out per M
1.00×of list price
$0.10 / $0.30in / out per M
1.00×of list price
Hugging Face Inference ProvidersThe same price StepFun charges.
262k context hereHugging Face Inference Providers ↗$0.10 / $0.30in / out per M
1.00×of list price
$0.10 / $0.30in / out per M
1.00×of list price
$0.10 / $0.30in / out per M
1.00×of list price
$0.10 / $0.30in / out per M
1.00×of list price
$0.10 / $0.30in / out per M
1.00×of list price
$0.10 / $0.30in / out per M
1.00×of list price
$0.10 / $0.30in / out per M
1.00×of list price
$0.10 / $0.30in / out per M
1.00×of list price
$0.10 / $0.30in / out per M
1.00×of list price
$0.11 / $0.32in / out per M
1.05×of list price
Cheaper, and nobody says why
1 price · never rankedBelow list on a closed model with nothing to account for it. Shown, never ranked, never a pick.
FeatherlessWe could not read this provider's prices reliably, so the row is listed but never ranked.
262k context hereFeatherless ↗$0.10 / $0.30in / out per M
1.00×of list price
Given away with limits
1 free tiers · never rankedThese providers give Step 3.5 Flash 2603 away inside a quota of their own. A limit is not a price, so none of them counts as cheapest here or anywhere else on the site.
NVIDIA build
Frequently asked
- Who sells Step 3.5 Flash 2603 cheapest?
- Vercel AI Gateway, at $0.09 in and $0.30 out per million tokens, read on 16 Sept 2026. 10% under the list price, an ordinary reseller margin.
- Is Step 3.5 Flash 2603 open weights?
- Yes. StepFun publishes the weights, so anyone may host Step 3.5 Flash 2603, which is why 16 providers sell it and why their prices differ so much.
- How much context does Step 3.5 Flash 2603 hold?
- 256,000 tokens in one call, which is about 256k, and it can call your own functions.
- How does Step 3.5 Flash 2603 compare with the rest of the market?
- At $0.60 per million tokens, StepFun's price is 83% below the $3.55 median across the 337 text models we track.