API cost decision in 10 seconds

KAT-Coder-Air V2.5 vs Gemini 3.1 Flash Lite (batch)

Pick KAT-Coder-Air V2.5 for lower cost; pick Gemini 3.1 Flash Lite (batch) only if the larger context window matters more.

Page updated: 2026-08-06T14:08:16Z Data confirmed: 2026-08-23T12:07:48Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick KAT-Coder-Air V2.5 for lower cost; pick Gemini 3.1 Flash Lite (batch) only if the larger context window matters more.

On the standard 1M input plus 500K output workload, KAT-Coder-Air V2.5 is estimated at $0.45 vs $0.5 for Gemini 3.1 Flash Lite (batch), saving $0.05 (10% lower).

Cost-first pickKAT-Coder-Air V2.5

Context-first pickGemini 3.1 Flash Lite (batch)

Sample savings$0.0510%

10x traffic gap$0.5

Gemini 3.1 Flash Lite (batch) has more context, but KAT-Coder-Air V2.5 saves $0.05 on the standard workload. At 10x that traffic, the same price gap is about $0.5. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Cost winner changes by workload shape: input-heavy / RAG favors Gemini 3.1 Flash Lite (batch), balanced workload favors KAT-Coder-Air V2.5, and output-heavy chatbot favors KAT-Coder-Air V2.5.

Workload shape	Token mix	Better pick	KAT-Coder-Air V2.5	Gemini 3.1 Flash Lite (batch)
Input-heavy / RAG	5M input + 500K output	Gemini 3.1 Flash Lite (batch)	$1.05	$1
Balanced workload	1M input + 1M output	KAT-Coder-Air V2.5	$0.75	$0.88
Output-heavy chatbot	1M input + 5M output	KAT-Coder-Air V2.5	$3.15	$3.88

Cheaper input Gemini 3.1 Flash Lite (batch) $0.15 vs $0.125 / 1M

Gemini 3.1 Flash Lite (batch) is $0.02 cheaper per 1M input tokens (16.7% lower; 1.2x difference).

Cheaper output KAT-Coder-Air V2.5 $0.6 vs $0.75 / 1M

KAT-Coder-Air V2.5 is $0.15 cheaper per 1M output tokens (20% lower; 1.25x difference).

Larger context Gemini 3.1 Flash Lite (batch) 256K vs 1.05M

Gemini 3.1 Flash Lite (batch) has 792.58K more context (4.1x larger).

Sample workload KAT-Coder-Air V2.5 $0.45 vs $0.5

KAT-Coder-Air V2.5 is $0.05 cheaper on the standard workload (10% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

KAT-Coder-Air V2.5 Calculating… Estimated API cost

Gemini 3.1 Flash Lite (batch) 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

Gemini 3.1 Flash Lite (batch) has the lower input price; KAT-Coder-Air V2.5 has the lower output price; Gemini 3.1 Flash Lite (batch) offers the larger context window. For the 1M input plus 500K output sample, KAT-Coder-Air V2.5 is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $0.45 for KAT-Coder-Air V2.5 and $0.5 for Gemini 3.1 Flash Lite (batch).

Best Fit

Choose KAT-Coder-Air V2.5 when you care most about lower output-token price.

Choose Gemini 3.1 Flash Lite (batch) when you care most about lower input-token price, and larger context window.

Decision Notes

On the standard 1M input plus 500K output workload, KAT-Coder-Air V2.5 is estimated at $0.45 vs $0.5 for Gemini 3.1 Flash Lite (batch), saving $0.05 (10% lower).
KAT-Coder-Air V2.5 is $0.05 cheaper on the standard workload (10% lower).
Gemini 3.1 Flash Lite (batch) is $0.02 cheaper per 1M input tokens (16.7% lower; 1.2x difference).
KAT-Coder-Air V2.5 is $0.15 cheaper per 1M output tokens (20% lower; 1.25x difference).
Gemini 3.1 Flash Lite (batch) has 792.58K more context (4.1x larger).

Head-to-Head Specs

Feature	KAT-Coder-Air V2.5 (Kwaipilot)	Gemini 3.1 Flash Lite (batch) (Google)
Input Price prompt tokens per 1M	$0.15	$0.125
Completion Price per 1M tokens	$0.6	$0.75
Sample Workload Cost 1M input + 500K output	$0.45	$0.5
Context Window	256K	1.05M
Release Date	2026-07-10	2026-05-07

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	KAT-Coder-Air V2.5	On the standard 1M input plus 500K output workload, KAT-Coder-Air V2.5 is estimated at $0.45 vs $0.5 for Gemini 3.1 Flash Lite (batch), saving $0.05 (10% lower).
High-volume input processing	Gemini 3.1 Flash Lite (batch)	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	KAT-Coder-Air V2.5	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	Gemini 3.1 Flash Lite (batch)	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 Flash Lite (batch) when lower sample workload cost matters most: $0.
Gemma 4 31B (free) can replace Gemini 3.1 Flash Lite (batch) when lower sample workload cost matters most: $0.
Lyria 3 Pro Preview can replace Gemini 3.1 Flash Lite (batch) when lower sample workload cost matters most: $0.
Lyria 3 Clip Preview can replace Gemini 3.1 Flash Lite (batch) when lower sample workload cost matters most: $0.

Larger context near this budget

DeepSeek V4 Flash 0731 offers 1.31M context with $0.17 sample workload cost.
DeepSeek V4 Flash Latest offers 1.31M context with $0.11 sample workload cost.
Llama 4 Scout offers 1.31M context with $0.25 sample workload cost.
MiMo-V2.5 offers 1.05M context with $0.28 sample workload cost.

Popular competitors

DeepSeek V4 Flash 0731 · DeepSeek · #1
MiMo-V2.5 · Xiaomi · #2
Hy3 · Tencent · #3
Ox Alpha · stealth · #4

Cheaper alternatives

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Larger context alternatives

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Provider catalogs

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Kwaipilot catalog

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Google catalog

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KAT-Coder-Air V2.5

KAT-Coder-Air V2.5 is a flagship-level Agentic Coding model that can directly hand over an entire issue or an entire business workflow to it, allowing it to autonomously locate and make...

Gemini 3.1 Flash Lite (batch)

Gemini 3.1 Flash Lite is Google’s GA high-efficiency multimodal model optimized for low-latency, high-volume workloads. It supports text, image, video, audio, and PDF inputs, and is designed for lightweight agentic...