API cost decision in 10 seconds

Reka Edge vs Gemini 3.1 Pro Preview Custom Tools

Pick Reka Edge 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: 2026-05-26T13:08:02Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Reka Edge 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, Reka Edge is estimated at $0.15 vs $8 for Gemini 3.1 Pro Preview Custom Tools, saving $7.85 (98.1% lower).

Cost-first pickReka Edge

Context-first pickGemini 3.1 Pro Preview Custom Tools

Sample savings$7.8598.1%

10x traffic gap$78.5

Gemini 3.1 Pro Preview Custom Tools has more context, but Reka Edge saves $7.85 on the standard workload. At 10x that traffic, the same price gap is about $78.5. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Reka Edge stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	Reka Edge	Gemini 3.1 Pro Preview Custom Tools
Input-heavy / RAG	5M input + 500K output	Reka Edge	$0.55	$16
Balanced workload	1M input + 1M output	Reka Edge	$0.2	$14
Output-heavy chatbot	1M input + 5M output	Reka Edge	$0.6	$62

Cheaper input Reka Edge $0.1 vs $2 / 1M

Reka Edge is $1.9 cheaper per 1M input tokens (95% lower; 20x difference).

Cheaper output Reka Edge $0.1 vs $12 / 1M

Reka Edge is $11.9 cheaper per 1M output tokens (99.2% lower; 120x difference).

Larger context Gemini 3.1 Pro Preview Custom Tools 16.38K vs 1.05M

Gemini 3.1 Pro Preview Custom Tools has 1.03M more context (64x larger).

Sample workload Reka Edge $0.15 vs $8

Reka Edge is $7.85 cheaper on the standard workload (98.1% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

Reka Edge 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

Reka Edge has the lower input price; Reka Edge 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, Reka Edge is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $0.15 for Reka Edge and $8 for Gemini 3.1 Pro Preview Custom Tools.

Best Fit

Choose Reka Edge 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, Reka Edge is estimated at $0.15 vs $8 for Gemini 3.1 Pro Preview Custom Tools, saving $7.85 (98.1% lower).
Reka Edge is $7.85 cheaper on the standard workload (98.1% lower).
Reka Edge is $1.9 cheaper per 1M input tokens (95% lower; 20x difference).
Reka Edge is $11.9 cheaper per 1M output tokens (99.2% lower; 120x difference).
Gemini 3.1 Pro Preview Custom Tools has 1.03M more context (64x larger).

Head-to-Head Specs

Feature	Reka Edge (rekaai)	Gemini 3.1 Pro Preview Custom Tools (Google)
Input Price prompt tokens per 1M	$0.1	$2
Completion Price per 1M tokens	$0.1	$12
Sample Workload Cost 1M input + 500K output	$0.15	$8
Context Window	16.38K	1.05M
Release Date	2026-03-20	2026-02-25

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Reka Edge	On the standard 1M input plus 500K output workload, Reka Edge is estimated at $0.15 vs $8 for Gemini 3.1 Pro Preview Custom Tools, saving $7.85 (98.1% lower).
High-volume input processing	Reka Edge	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Reka Edge	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 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.

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Provider catalogs

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rekaai catalog

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Google catalog

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