API cost decision in 10 seconds

Step 3.5 Flash vs 🔥DeepSeek V3.2

Pick Step 3.5 Flash when budget and context both matter.

Pricing data updated:  Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Step 3.5 Flash when budget and context both matter.

On the standard 1M input plus 500K output workload, Step 3.5 Flash is estimated at $0.24 vs $0.44 for DeepSeek V3.2, saving $0.2 (45.6% lower).

Cost-first pickStep 3.5 Flash
Context-first pickStep 3.5 Flash
Sample savings$0.245.6%
10x traffic gap$2.01

Step 3.5 Flash is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $2.01. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Step 3.5 Flash stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shapeToken mixBetter pickStep 3.5 FlashDeepSeek V3.2
Input-heavy / RAG 5M input + 500K output Step 3.5 Flash $0.6 $1.45
Balanced workload 1M input + 1M output Step 3.5 Flash $0.39 $0.63
Output-heavy chatbot 1M input + 5M output Step 3.5 Flash $1.59 $2.14
Cheaper inputStep 3.5 Flash$0.09 vs $0.25 / 1M
Cheaper outputStep 3.5 Flash$0.3 vs $0.38 / 1M
Larger contextStep 3.5 Flash262.14K vs 131.07K
Sample workloadStep 3.5 Flash$0.24 vs $0.44

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
Step 3.5 FlashCalculating…Estimated API cost
DeepSeek V3.2Calculating…Estimated API cost
Cheaper for this workloadCalculating…Difference: calculating…

This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.

Quick Decision

Verdict

Step 3.5 Flash has the lower input price, Step 3.5 Flash has the lower output price, and Step 3.5 Flash offers the larger context window.

For a 1M input token plus 500K output token workload, the estimated API cost is $0.24 for Step 3.5 Flash and $0.44 for DeepSeek V3.2.

Best Fit

Choose Step 3.5 Flash when you care most about lower input-token price, lower output-token price, and larger context window.

Choose DeepSeek V3.2 when its provider, model quality, latency, or availability is more important than the numeric price/context winner.

Head-to-Head Specs
FeatureStep 3.5 Flash
(StepFun)		🔥DeepSeek V3.2
(DeepSeek)
Input Price
prompt tokens per 1M		$0.09$0.25
Completion Price
per 1M tokens		$0.3$0.38
Sample Workload Cost
1M input + 500K output		$0.24$0.44
Context Window262.14K131.07K
Release Date2026-01-292025-12-01
Popularity#8
Step 3.5 Flash

Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....

DeepSeek V3.2

DeepSeek-V3.2 is a large language model designed to harmonize high computational efficiency with strong reasoning and agentic tool-use performance. It introduces DeepSeek Sparse Attention (DSA), a fine-grained sparse attention mechanism...

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productionStep 3.5 FlashOn the standard 1M input plus 500K output workload, Step 3.5 Flash is estimated at $0.24 vs $0.44 for DeepSeek V3.2, saving $0.2 (45.6% lower).
High-volume input processingStep 3.5 FlashLower prompt-token price matters most when prompts or retrieved passages dominate the bill.
Long responses and chatbotsStep 3.5 FlashLower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workStep 3.5 FlashA larger context window leaves more room for retrieved passages and source files.