API cost decision in 10 seconds

Gemma 4 31B vs 🔥Gemini 3 Flash Preview

Pick Gemma 4 31B for lower cost; pick Gemini 3 Flash Preview only if the larger context window matters more.

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

Budget verdict

Pick Gemma 4 31B for lower cost; pick Gemini 3 Flash Preview only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Gemma 4 31B is estimated at $0.3 vs $2 for Gemini 3 Flash Preview, saving $1.7 (84.8% lower).

Cost-first pickGemma 4 31B
Context-first pickGemini 3 Flash Preview
Sample savings$1.784.8%
10x traffic gap$16.95

Gemini 3 Flash Preview has more context, but Gemma 4 31B saves $1.7 on the standard workload. At 10x that traffic, the same price gap is about $16.95. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Gemma 4 31B stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shapeToken mixBetter pickGemma 4 31BGemini 3 Flash Preview
Input-heavy / RAG 5M input + 500K output Gemma 4 31B $0.78 $4
Balanced workload 1M input + 1M output Gemma 4 31B $0.49 $3.5
Output-heavy chatbot 1M input + 5M output Gemma 4 31B $1.97 $15.5
Cheaper inputGemma 4 31B$0.12 vs $0.5 / 1M
Cheaper outputGemma 4 31B$0.37 vs $3 / 1M
Larger contextGemini 3 Flash Preview262.14K vs 1.05M
Sample workloadGemma 4 31B$0.3 vs $2

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
Gemma 4 31BCalculating…Estimated API cost
Gemini 3 Flash PreviewCalculating…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

Gemma 4 31B has the lower input price, Gemma 4 31B has the lower output price, and Gemini 3 Flash Preview offers the larger context window.

For a 1M input token plus 500K output token workload, the estimated API cost is $0.3 for Gemma 4 31B and $2 for Gemini 3 Flash Preview.

Best Fit

Choose Gemma 4 31B when you care most about lower input-token price, and lower output-token price.

Choose Gemini 3 Flash Preview when you care most about larger context window.

Head-to-Head Specs
FeatureGemma 4 31B
(Google)		🔥Gemini 3 Flash Preview
(Google)
Input Price
prompt tokens per 1M		$0.12$0.5
Completion Price
per 1M tokens		$0.37$3
Sample Workload Cost
1M input + 500K output		$0.3$2
Context Window262.14K1.05M
Release Date2026-04-022025-12-17
Popularity#7
Gemma 4 31B

Gemma 4 31B Instruct is Google DeepMind's 30.7B dense multimodal model supporting text and image input with text output. Features a 256K token context window, configurable thinking/reasoning mode, native function...

Gemini 3 Flash Preview

Gemini 3 Flash Preview is a high speed, high value thinking model designed for agentic workflows, multi turn chat, and coding assistance. It delivers near Pro level reasoning and tool...

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productionGemma 4 31BOn the standard 1M input plus 500K output workload, Gemma 4 31B is estimated at $0.3 vs $2 for Gemini 3 Flash Preview, saving $1.7 (84.8% lower).
High-volume input processingGemma 4 31BLower prompt-token price matters most when prompts or retrieved passages dominate the bill.
Long responses and chatbotsGemma 4 31BLower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workGemini 3 Flash PreviewA larger context window leaves more room for retrieved passages and source files.