Step 3.5 Flash: API pricing, context window and capabilities

Prices from official vendor price lists · October 2026

Step 3.5 Flash costs $0.1 per 1M input tokens and $0.3 per 1M output tokens, with a 262.1K context window. One of the cheapest models here — below 85% of the rating on output price. Suited to high volume, where a wrong answer is cheap to retry.

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Capabilities

API $/1M (in / out)

$0.1 / $0.3

Context window

262.1K tokens

Price / mo

API only

Overview Reviews

Step 3.5 Flash is an AI model from Stepfun, priced at $0.1 input and $0.3 output per 1M tokens. That places it in the budget tier of this rating — cheaper than 85% of the 205 priced models listed.

It holds 262.1K tokens in a single conversation. Capabilities recorded in this rating: text & chat, vision, low latency, multilingual, proprietary API. Access is through the API rather than a consumer subscription.

API price$0.1 / $0.3per 1M tokens, in / out

Context262.1K tokenstokens per conversation

VendorStepfunall models from this vendor

TierBudgetcheaper than 85% of models

Cost calculator

1M tokens/mo10M tokens/mo50M tokens/mo200M tokens/mo

Standard$0.25~~AED 1 per month~~

With batch −50%$0.12~~AED 0 per month~~

With caching on input$0.23~~AED 1 per month~~

Standard$2.50~~AED 9 per month~~

With batch −50%$1.25~~AED 5 per month~~

With caching on input$2.27~~AED 8 per month~~

Standard$12.50~~AED 46 per month~~

With batch −50%$6.25~~AED 23 per month~~

With caching on input$11.38~~AED 42 per month~~

Standard$50.00~~AED 184 per month~~

With batch −50%$25.00~~AED 92 per month~~

With caching on input$45.50~~AED 167 per month~~

Assumes a 1:3 input-to-output ratio, which is typical for chat and generation. Dirham figures use 3.6725 per dollar. Batch and caching discounts apply where the vendor offers them.

Compared with alternatives

How Step 3.5 Flash sits against its neighbours in this rating. Tap a card to open that model.

Hy-MT2-30B-A3B

Cheaper

Tencent

$0.074 / $0.2958.2K tokens

gpt-oss-safeguard-20b

Closest match

OpenAI

$0.075 / $0.3131.1K tokens

Gemma 4 31B

Step up

Google DeepMind

$0.09 / $0.34262.1K tokens

Good and poor fit

Good fit

Reading screenshots, charts, scanned documents and photos.
High-volume routing, classification and autocomplete.

Poor fit

Long multi-step reasoning, where a larger model finishes in fewer attempts.
Integrations that depend on structured function calls.

Related filters

Text & chat234 models for text generation and chat

Vision159 models that read images

Low latency76 small, fast models for volume

MultilingualAll 245 models work beyond English

Proprietary API151 closed-weight, API-only models

Stepfun2 models from this vendor

All 245 modelsThe full rating with filters and prices

Frequently asked questions

How much does Step 3.5 Flash cost?

$0.1 / $0.3 per 1M tokens, input and output. In dirhams that is roughly AED 0.37 per 1M input tokens. Batch processing halves it where the vendor offers it.

What is the context window of Step 3.5 Flash?

262.1K tokens in a single conversation.

What can Step 3.5 Flash do?

In this rating it is recorded with: text & chat, vision, low latency, multilingual, proprietary API.

Is Step 3.5 Flash a good choice?

It depends on the job. See the good-fit and poor-fit lists above, and compare against the neighbouring models before committing.

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