API cost decision in 10 seconds

o3 Mini vs Gemma 3 12B

Pick Gemma 3 12B for lower cost; pick o3 Mini only if the larger context window matters more.

Page updated: 2026-05-26T15:08:08Z Data confirmed: 2026-05-26T19:08:13Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Gemma 3 12B for lower cost; pick o3 Mini only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Gemma 3 12B is estimated at $0.11 vs $3.3 for o3 Mini, saving $3.2 (96.8% lower).

Cost-first pickGemma 3 12B

Context-first picko3 Mini

Sample savings$3.296.8%

10x traffic gap$31.95

o3 Mini has more context, but Gemma 3 12B saves $3.2 on the standard workload. At 10x that traffic, the same price gap is about $31.95. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Gemma 3 12B stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	o3 Mini	Gemma 3 12B
Input-heavy / RAG	5M input + 500K output	Gemma 3 12B	$7.7	$0.27
Balanced workload	1M input + 1M output	Gemma 3 12B	$5.5	$0.17
Output-heavy chatbot	1M input + 5M output	Gemma 3 12B	$23.1	$0.69

Cheaper input Gemma 3 12B $1.1 vs $0.04 / 1M

Gemma 3 12B is $1.06 cheaper per 1M input tokens (96.4% lower; 27.5x difference).

Cheaper output Gemma 3 12B $4.4 vs $0.13 / 1M

Gemma 3 12B is $4.27 cheaper per 1M output tokens (97% lower; 33.8x difference).

Larger context o3 Mini 200K vs 131.07K

o3 Mini has 68.93K more context (1.53x larger).

Sample workload Gemma 3 12B $3.3 vs $0.11

Gemma 3 12B is $3.2 cheaper on the standard workload (96.8% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

o3 Mini Calculating… Estimated API cost

Gemma 3 12B 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 3 12B has the lower input price; Gemma 3 12B has the lower output price; o3 Mini offers the larger context window. For the 1M input plus 500K output sample, Gemma 3 12B is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $3.3 for o3 Mini and $0.11 for Gemma 3 12B.

Best Fit

Choose o3 Mini when you care most about larger context window.

Choose Gemma 3 12B when you care most about lower input-token price, and lower output-token price.

Decision Notes

On the standard 1M input plus 500K output workload, Gemma 3 12B is estimated at $0.11 vs $3.3 for o3 Mini, saving $3.2 (96.8% lower).
Gemma 3 12B is $3.2 cheaper on the standard workload (96.8% lower).
Gemma 3 12B is $1.06 cheaper per 1M input tokens (96.4% lower; 27.5x difference).
Gemma 3 12B is $4.27 cheaper per 1M output tokens (97% lower; 33.8x difference).
o3 Mini has 68.93K more context (1.53x larger).

Head-to-Head Specs

Feature	o3 Mini (OpenAI)	Gemma 3 12B (Google)
Input Price prompt tokens per 1M	$1.1	$0.04
Completion Price per 1M tokens	$4.4	$0.13
Sample Workload Cost 1M input + 500K output	$3.3	$0.11
Context Window	200K	131.07K
Release Date	2025-01-31	2025-03-13
Popularity	#120	#123

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Gemma 3 12B	On the standard 1M input plus 500K output workload, Gemma 3 12B is estimated at $0.11 vs $3.3 for o3 Mini, saving $3.2 (96.8% lower).
High-volume input processing	Gemma 3 12B	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Gemma 3 12B	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	o3 Mini	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 o3 Mini when lower sample workload cost matters most: $0.
gpt-oss-20b (free) can replace o3 Mini when lower sample workload cost matters most: $0.
gpt-oss-20b can replace o3 Mini when lower sample workload cost matters most: $0.1.
gpt-oss-120b can replace o3 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.
Grok 4.20 offers 2M context with $2.5 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.

Popular competitors

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Claude Sonnet 4.6 · Anthropic · #4

Cheaper alternatives

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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

Check other Google models with comparable pricing, context, or release timing.

Open Google models

o3 Mini

OpenAI o3-mini is a cost-efficient language model optimized for STEM reasoning tasks, particularly excelling in science, mathematics, and coding. This model supports the `reasoning_effort` parameter, which can be set to...

Gemma 3 12B

Gemma 3 introduces multimodality, supporting vision-language input and text outputs. It handles context windows up to 128k tokens, understands over 140 languages, and offers improved math, reasoning, and chat capabilities,...