API cost decision in 10 seconds

Lyria 3 Pro Preview vs Gemini 3.1 Pro Preview Custom Tools

Pick Lyria 3 Pro Preview for lower cost; pick Gemini 3.1 Pro Preview Custom Tools only if the larger context window matters more.

Page updated: 2026-05-26T10:03:26Z Data confirmed: 2026-05-26T12:38:15Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Lyria 3 Pro Preview for lower cost; pick Gemini 3.1 Pro Preview Custom Tools only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Lyria 3 Pro Preview is estimated at $0 vs $8 for Gemini 3.1 Pro Preview Custom Tools, saving $8 (100% lower).

Cost-first pickLyria 3 Pro Preview

Context-first pickGemini 3.1 Pro Preview Custom Tools

Sample savings$8100%

10x traffic gap$80

Gemini 3.1 Pro Preview Custom Tools has more context, but Lyria 3 Pro Preview saves $8 on the standard workload. At 10x that traffic, the same price gap is about $80. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Lyria 3 Pro Preview stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	Lyria 3 Pro Preview	Gemini 3.1 Pro Preview Custom Tools
Input-heavy / RAG	5M input + 500K output	Lyria 3 Pro Preview	$0	$16
Balanced workload	1M input + 1M output	Lyria 3 Pro Preview	$0	$14
Output-heavy chatbot	1M input + 5M output	Lyria 3 Pro Preview	$0	$62

Cheaper input Lyria 3 Pro Preview $0 vs $2 / 1M

Lyria 3 Pro Preview is free for input tokens while Gemini 3.1 Pro Preview Custom Tools costs $2 per 1M tokens.

Cheaper output Lyria 3 Pro Preview $0 vs $12 / 1M

Lyria 3 Pro Preview is free for output tokens while Gemini 3.1 Pro Preview Custom Tools costs $12 per 1M tokens.

Larger context Gemini 3.1 Pro Preview Custom Tools 1.05M vs 1.05M

Gemini 3.1 Pro Preview Custom Tools has 180 more context (1x larger).

Sample workload Lyria 3 Pro Preview $0 vs $8

Lyria 3 Pro Preview is free for the standard workload while the other model is estimated at $8.

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

Lyria 3 Pro Preview Calculating… Estimated API cost

Gemini 3.1 Pro Preview Custom Tools 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

Lyria 3 Pro Preview has the lower input price; Lyria 3 Pro Preview has the lower output price; Gemini 3.1 Pro Preview Custom Tools offers the larger context window. For the 1M input plus 500K output sample, Lyria 3 Pro Preview is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $0 for Lyria 3 Pro Preview and $8 for Gemini 3.1 Pro Preview Custom Tools.

Best Fit

Choose Lyria 3 Pro Preview when you care most about lower input-token price, and lower output-token price.

Choose Gemini 3.1 Pro Preview Custom Tools when you care most about larger context window.

Decision Notes

On the standard 1M input plus 500K output workload, Lyria 3 Pro Preview is estimated at $0 vs $8 for Gemini 3.1 Pro Preview Custom Tools, saving $8 (100% lower).
Lyria 3 Pro Preview is free for the standard workload while the other model is estimated at $8.
Lyria 3 Pro Preview is free for input tokens while Gemini 3.1 Pro Preview Custom Tools costs $2 per 1M tokens.
Lyria 3 Pro Preview is free for output tokens while Gemini 3.1 Pro Preview Custom Tools costs $12 per 1M tokens.
Gemini 3.1 Pro Preview Custom Tools has 180 more context (1x larger).

Head-to-Head Specs

Feature	Lyria 3 Pro Preview (Google)	Gemini 3.1 Pro Preview Custom Tools (Google)
Input Price prompt tokens per 1M	$0	$2
Completion Price per 1M tokens	$0	$12
Sample Workload Cost 1M input + 500K output	$0	$8
Context Window	1.05M	1.05M
Release Date	2026-03-30	2026-02-25

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Lyria 3 Pro Preview	On the standard 1M input plus 500K output workload, Lyria 3 Pro Preview is estimated at $0 vs $8 for Gemini 3.1 Pro Preview Custom Tools, saving $8 (100% lower).
High-volume input processing	Lyria 3 Pro Preview	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Lyria 3 Pro Preview	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	Gemini 3.1 Pro Preview Custom Tools	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

Gemma 4 26B A4B (free) can replace Gemini 3.1 Pro Preview Custom Tools when lower sample workload cost matters most: $0.
Gemma 4 31B (free) can replace Gemini 3.1 Pro Preview Custom Tools when lower sample workload cost matters most: $0.
Lyria 3 Clip Preview can replace Gemini 3.1 Pro Preview Custom Tools when lower sample workload cost matters most: $0.
Gemma 3 4B can replace Gemini 3.1 Pro Preview Custom Tools when lower sample workload cost matters most: $0.08.

Larger context near this budget

Llama 4 Scout offers 10M context with $0.23 sample workload cost.
Grok 4.20 Multi-Agent offers 2M context with $5 sample workload cost.
Grok 4.20 offers 2M context with $2.5 sample workload cost.
GPT-5.4 offers 1.05M context with $10 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

Cheaper alternatives

Review low-cost models sorted by a standard 1M input plus 500K output workload.

Open cheapest models

Larger context alternatives

Find models with larger context windows for RAG, long documents, and codebase review.

Open largest context models

Provider catalogs

Compare models within provider hubs before choosing a final API vendor.

Open provider hubs

Google catalog

Review all tracked Google models before deciding whether this matchup is the right shortlist.

Open Google models

Lyria 3 Pro Preview

Full-length songs are priced at $0.08 per song. Lyria 3 is Google's family of music generation models, available through the Gemini API. With Lyria 3, you can generate high-quality, 48kHz...

Gemini 3.1 Pro Preview Custom Tools

Gemini 3.1 Pro Preview Custom Tools is a variant of Gemini 3.1 Pro that improves tool selection behavior by preventing overuse of a general bash tool when more efficient third-party...