API cost decision in 10 seconds

NewGemini 3.1 Flash Lite vs Qwen3.5-9B

Pick Qwen3.5-9B for lower cost; pick Gemini 3.1 Flash Lite only if the larger context window matters more.

Pricing data updated: 2026-05-26T11:08:00Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Qwen3.5-9B for lower cost; pick Gemini 3.1 Flash Lite only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Qwen3.5-9B is estimated at $0.11 vs $1 for Gemini 3.1 Flash Lite, saving $0.89 (88.5% lower).

Cost-first pickQwen3.5-9B

Context-first pickGemini 3.1 Flash Lite

Sample savings$0.8988.5%

10x traffic gap$8.85

Gemini 3.1 Flash Lite has more context, but Qwen3.5-9B saves $0.89 on the standard workload. At 10x that traffic, the same price gap is about $8.85. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Qwen3.5-9B stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	Gemini 3.1 Flash Lite	Qwen3.5-9B
Input-heavy / RAG	5M input + 500K output	Qwen3.5-9B	$2	$0.28
Balanced workload	1M input + 1M output	Qwen3.5-9B	$1.75	$0.19
Output-heavy chatbot	1M input + 5M output	Qwen3.5-9B	$7.75	$0.79

Cheaper input Qwen3.5-9B $0.25 vs $0.04 / 1M

Qwen3.5-9B is $0.21 cheaper per 1M input tokens (84% lower; 6.25x difference).

Cheaper output Qwen3.5-9B $1.5 vs $0.15 / 1M

Qwen3.5-9B is $1.35 cheaper per 1M output tokens (90% lower; 10x difference).

Larger context Gemini 3.1 Flash Lite 1.05M vs 262.14K

Gemini 3.1 Flash Lite has 786.43K more context (4x larger).

Sample workload Qwen3.5-9B $1 vs $0.11

Qwen3.5-9B is $0.89 cheaper on the standard workload (88.5% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

Gemini 3.1 Flash Lite Calculating… Estimated API cost

Qwen3.5-9B 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

Qwen3.5-9B has the lower input price; Qwen3.5-9B has the lower output price; Gemini 3.1 Flash Lite offers the larger context window. For the 1M input plus 500K output sample, Qwen3.5-9B is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $1 for Gemini 3.1 Flash Lite and $0.11 for Qwen3.5-9B.

Best Fit

Choose Gemini 3.1 Flash Lite when you care most about larger context window.

Choose Qwen3.5-9B 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, Qwen3.5-9B is estimated at $0.11 vs $1 for Gemini 3.1 Flash Lite, saving $0.89 (88.5% lower).
Qwen3.5-9B is $0.89 cheaper on the standard workload (88.5% lower).
Qwen3.5-9B is $0.21 cheaper per 1M input tokens (84% lower; 6.25x difference).
Qwen3.5-9B is $1.35 cheaper per 1M output tokens (90% lower; 10x difference).
Gemini 3.1 Flash Lite has 786.43K more context (4x larger).

Head-to-Head Specs

Feature	NewGemini 3.1 Flash Lite (Google)	Qwen3.5-9B (Qwen)
Input Price prompt tokens per 1M	$0.25	$0.04
Completion Price per 1M tokens	$1.5	$0.15
Sample Workload Cost 1M input + 500K output	$1	$0.11
Context Window	1.05M	262.14K
Release Date	2026-05-07	2026-03-10

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Qwen3.5-9B	On the standard 1M input plus 500K output workload, Qwen3.5-9B is estimated at $0.11 vs $1 for Gemini 3.1 Flash Lite, saving $0.89 (88.5% lower).
High-volume input processing	Qwen3.5-9B	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Qwen3.5-9B	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	Gemini 3.1 Flash Lite	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 when lower sample workload cost matters most: $0.
Gemma 4 31B (free) can replace Gemini 3.1 Flash Lite when lower sample workload cost matters most: $0.
Lyria 3 Pro Preview can replace Gemini 3.1 Flash Lite when lower sample workload cost matters most: $0.
Lyria 3 Clip Preview can replace Gemini 3.1 Flash Lite 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.
Owl Alpha offers 1.05M context with $0 sample workload cost.

Popular competitors

No popular competitor is currently available.

Cheaper alternatives

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

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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.

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Google catalog

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

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Qwen catalog

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

Open Qwen models

Gemini 3.1 Flash Lite

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...

Qwen3.5-9B

Qwen3.5-9B is a multimodal foundation model from the Qwen3.5 family, designed to deliver strong reasoning, coding, and visual understanding in an efficient 9B-parameter architecture. It uses a unified vision-language design...