API cost decision in 10 seconds

New🔥Owl Alpha vs Gemini 3.1 Pro Preview Custom Tools

Pick Owl Alpha when budget is the priority.

Page updated: 2026-05-26T12:03:47Z Data confirmed: 2026-05-26T12:43:06Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Owl Alpha when budget is the priority.

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

Cost-first pickOwl Alpha

Context-first pickBoth models

Sample savings$8100%

10x traffic gap$80

The reported context window is tied, so cost and provider fit carry more weight. 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.

Owl Alpha stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

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

Cheaper input Owl Alpha $0 vs $2 / 1M

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

Cheaper output Owl Alpha $0 vs $12 / 1M

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

Larger context Tie 1.05M vs 1.05M

Both models report the same context window at 1.05M tokens.

Sample workload Owl Alpha $0 vs $8

Owl Alpha 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

Owl Alpha 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

Owl Alpha has the lower input price; Owl Alpha has the lower output price; both models report the same context window. For the 1M input plus 500K output sample, Owl Alpha is cheaper for the standard workload.

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

Best Fit

Choose Owl Alpha when you care most about lower input-token price, and lower output-token price.

Choose Gemini 3.1 Pro Preview Custom Tools when its provider, model quality, latency, or availability is more important than the numeric price/context winner.

Decision Notes

On the standard 1M input plus 500K output workload, Owl Alpha is estimated at $0 vs $8 for Gemini 3.1 Pro Preview Custom Tools, saving $8 (100% lower).
Owl Alpha is free for the standard workload while the other model is estimated at $8.
Owl Alpha is free for input tokens while Gemini 3.1 Pro Preview Custom Tools costs $2 per 1M tokens.
Owl Alpha is free for output tokens while Gemini 3.1 Pro Preview Custom Tools costs $12 per 1M tokens.
Both models report the same context window at 1.05M tokens.

Head-to-Head Specs

Feature	New🔥Owl Alpha (OpenRouter)	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	2026-04-28	2026-02-25
Popularity	#5

Use-Case Decision Matrix

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

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

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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

OpenRouter catalog

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

Open OpenRouter models

Google catalog

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

Open Google models

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