API cost decision in 10 seconds

🔥GPT-4o-mini vs Gemma 4 31B

Pick Gemma 4 31B when budget and context both matter.

Page updated: 2026-05-26T12:03:47Z Data confirmed: 2026-05-26T14:08:03Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Gemma 4 31B when budget and context both matter.

On the standard 1M input plus 500K output workload, Gemma 4 31B is estimated at $0.3 vs $0.45 for GPT-4o-mini, saving $0.14 (32.2% lower).

Cost-first pickGemma 4 31B

Context-first pickGemma 4 31B

Sample savings$0.1432.2%

10x traffic gap$1.45

Gemma 4 31B is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $1.45. 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 shape	Token mix	Better pick	GPT-4o-mini	Gemma 4 31B
Input-heavy / RAG	5M input + 500K output	Gemma 4 31B	$1.05	$0.78
Balanced workload	1M input + 1M output	Gemma 4 31B	$0.75	$0.49
Output-heavy chatbot	1M input + 5M output	Gemma 4 31B	$3.15	$1.97

Cheaper input Gemma 4 31B $0.15 vs $0.12 / 1M

Gemma 4 31B is $0.03 cheaper per 1M input tokens (20% lower; 1.25x difference).

Cheaper output Gemma 4 31B $0.6 vs $0.37 / 1M

Gemma 4 31B is $0.23 cheaper per 1M output tokens (38.3% lower; 1.62x difference).

Larger context Gemma 4 31B 128K vs 262.14K

Gemma 4 31B has 134.14K more context (2.05x larger).

Sample workload Gemma 4 31B $0.45 vs $0.3

Gemma 4 31B is $0.14 cheaper on the standard workload (32.2% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

GPT-4o-mini Calculating… Estimated API cost

Gemma 4 31B Calculating… Estimated API cost

Cheaper for this workload Calculating… 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; Gemma 4 31B offers the larger context window. For the 1M input plus 500K output sample, Gemma 4 31B is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $0.45 for GPT-4o-mini and $0.3 for Gemma 4 31B.

Best Fit

Choose GPT-4o-mini when its provider, model quality, latency, or availability is more important than the numeric price/context winner.

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

Decision Notes

On the standard 1M input plus 500K output workload, Gemma 4 31B is estimated at $0.3 vs $0.45 for GPT-4o-mini, saving $0.14 (32.2% lower).
Gemma 4 31B is $0.14 cheaper on the standard workload (32.2% lower).
Gemma 4 31B is $0.03 cheaper per 1M input tokens (20% lower; 1.25x difference).
Gemma 4 31B is $0.23 cheaper per 1M output tokens (38.3% lower; 1.62x difference).
Gemma 4 31B has 134.14K more context (2.05x larger).

Head-to-Head Specs

Feature	🔥GPT-4o-mini (OpenAI)	Gemma 4 31B (Google)
Input Price prompt tokens per 1M	$0.15	$0.12
Completion Price per 1M tokens	$0.6	$0.37
Sample Workload Cost 1M input + 500K output	$0.45	$0.3
Context Window	128K	262.14K
Release Date	2024-07-18	2026-04-02
Popularity	#16

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Gemma 4 31B	On the standard 1M input plus 500K output workload, Gemma 4 31B is estimated at $0.3 vs $0.45 for GPT-4o-mini, saving $0.14 (32.2% lower).
High-volume input processing	Gemma 4 31B	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Gemma 4 31B	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	Gemma 4 31B	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

gpt-oss-120b (free) can replace GPT-4o-mini when lower sample workload cost matters most: $0.
gpt-oss-20b (free) can replace GPT-4o-mini when lower sample workload cost matters most: $0.
gpt-oss-20b can replace GPT-4o-mini when lower sample workload cost matters most: $0.1.
gpt-oss-120b can replace GPT-4o-mini when lower sample workload cost matters most: $0.13.

Larger context near this budget

Llama 4 Scout offers 10M context with $0.23 sample workload cost.
Owl Alpha offers 1.05M context with $0 sample workload cost.
DeepSeek V4 Flash offers 1.05M context with $0.2 sample workload cost.
Gemini 2.5 Flash Lite offers 1.05M context with $0.3 sample workload cost.

Popular competitors

DeepSeek V4 Flash · DeepSeek · #1
Hy3 preview · Tencent · #2
Claude Opus 4.7 · Anthropic · #3
Claude Sonnet 4.6 · Anthropic · #4

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Larger context alternatives

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Provider catalogs

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OpenAI catalog

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Google catalog

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GPT-4o-mini

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Gemma 4 31B

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