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Model comparison · Updated 1 Sep 2026

Gemini 2.5 Flash vs Qwen3.5 Plus 2026-04-20

Gemini 2.5 Flash and Qwen3.5 Plus 2026-04-20 cost the same on input, $0.30 per 1M tokens. Gemini 2.5 Flash has the larger context window (1.05M against 1M tokens). For a support chatbot at 10,000 chats a day, the standard-tier bill is about $360 a month for Gemini 2.5 Flash and $297 for Qwen3.5 Plus 2026-04-20.

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ModelsAtlas. “Gemini 2.5 Flash vs Qwen3.5 Plus 2026-04-20”. Retrieved 1 Sep 2026. https://modelsatlas.com/compare/google/gemini-2-5/vs/qwen/3-5-plus

Model A

Gemini 2.5 Flash

by Google · weights not marked open · GRIDD5

Input / 1M
$0.30
observed We measured
Source
Our catalogue
Retrieved
17 Aug 2026
Output / 1M$2.50
Context1.05M
vs

Model B

Qwen3.5 Plus 2026-04-20

by Qwen (Alibaba) · weights not marked open · GRIDD5

Input / 1M
$0.30
observed We measured
Source
Our catalogue
Retrieved
17 Aug 2026
Output / 1M$1.80
Context1M

Key numbers

Standard tier · highlighted = better

Gemini 2.5 Flash
Qwen3.5 Plus 2026-04-20
Input / 1M tokens
$0.30
$0.30
Output / 1M tokens
$2.50
$1.80
Batch input / output
$0.05 / $0.20
Not listed
Context window
1,048,576
1,000,000
Input types
Not disclosed
Not disclosed
Weights
Not marked open
Not marked open
Tiers listed
batch, standard
standard
Prices checked
2026-08-17
2026-09-01

What it costs for real workloads

Monthly, standard tier, 30 days

Support chatbot10k chats/day · 1.5k in, 300 out
$360/mo
$297/mo
RAG over documents2k queries/day · 12k in, 500 out
$291/mo
$270/mo
Coding agent300 tasks/day · 60k in, 8k out
$342/mo
$292/mo

Gemini 2.5 Flash   Qwen3.5 Plus 2026-04-20 · Derived from the standard-tier prices above, input and output tokens per request as stated, 30 days. Excludes caching discounts and batch. Try your own numbers.

On the atlas

Price band (A–H) × context band (1–6)

Same square. Gemini 2.5 Flash and Qwen3.5 Plus 2026-04-20 share D5.

Same square as Gemini 2.5 Flash: DeepSeek V4.1 Flash ($0.30), Gemini 3.5 Flash Lite ($0.30), MiniMax M3 ($0.30). Open D5

AFreeB<$0.10C$0.10–0.30D$0.30–1E$1–3F$3–10G$10–30H$30+1<32K232–128K3128–256K4256K–1M51M6>1MINPUT PRICE PER 1M TOKENS →CONTEXT WINDOW ↑ · position within a square follows the real valueDeepSeek V4.1 Flash · D5Gemini 3.5 Flash Lite · D5MiniMax M3 · D5Qwen3.7 Plus · D5Qwen3.6 Plus · D5Gemini 2.5 FlashGemini 2.5 FlashQwen3.5 Plus 2026-04-20Qwen3.5 Plus 2026-04-20
Gemini 2.5 FlashQwen3.5 Plus 2026-04-20Nearest neighboursOpen weights
View the map as a table (1 squares)
SquarePrice bandContext bandModels
GRIDD5$0.30–11MGemini 2.5 Flash, Qwen3.5 Plus 2026-04-20, DeepSeek V4.1 Flash, Gemini 3.5 Flash Lite, MiniMax M3, Qwen3.7 Plus, Qwen3.6 Plus

Capabilities side by side

Only what our records list

Gemini 2.5 Flash
Qwen3.5 Plus 2026-04-20
Vision input
Not disclosed
Not disclosed
Audio input
Not disclosed
Not disclosed
Open weights
Not marked open
Not marked open
Batch tier
Supported
Not listed
Free tier
Not listed
Not listed
Thinking tier
Not listed
Not listed

Neither record lists input types, so we do not claim any.

Which should you choose?

Editorial

Choose Gemini 2.5 Flash if…

  • your prompts are long: it takes 1,048,576 tokens against 1,000,000
  • work can wait: it lists a batch tier and the other does not

Choose Qwen3.5 Plus 2026-04-20 if…

  • output dominates your bill: $1.80 per 1M output against $2.50

Each reason is a fact from the tables above. Picking between them is our judgement, and we do not benchmark quality: price and context are what we can measure, so test both on your own prompts before you commit.

Questions

Is Gemini 2.5 Flash better than Qwen3.5 Plus 2026-04-20?
We do not benchmark quality, so we cannot say. On the recorded numbers: Gemini 2.5 Flash and Qwen3.5 Plus 2026-04-20 cost the same on input, $0.30 per 1M tokens. Gemini 2.5 Flash has the larger context window (1.05M against 1M tokens). For a support chatbot at 10,000 chats a day, the standard-tier bill is about $360 a month for Gemini 2.5 Flash and $297 for Qwen3.5 Plus 2026-04-20. Which is better for you depends on your task; test both on your own prompts.
Which is cheaper, Gemini 2.5 Flash or Qwen3.5 Plus 2026-04-20?
They cost the same on input, $0.30 per 1M tokens. Output is $2.50 for Gemini 2.5 Flash and $1.80 for Qwen3.5 Plus 2026-04-20.
How much does each cost per 1M tokens?
Gemini 2.5 Flash: $0.30 input and $2.50 output. Qwen3.5 Plus 2026-04-20: $0.30 input and $1.80 output. Standard tier, USD.
Which has the larger context window?
Gemini 2.5 Flash, with 1,048,576 tokens. Qwen3.5 Plus 2026-04-20 has 1,000,000 tokens.
Do both offer batch pricing?
Gemini 2.5 Flash lists a batch tier, at 50% of its standard price. Qwen3.5 Plus 2026-04-20 lists no batch tier.
Can both read images or audio?
Input types recorded for Gemini 2.5 Flash: none recorded. For Qwen3.5 Plus 2026-04-20: none recorded. Where a record lists none we say so rather than guess; check each vendor's documentation before relying on a capability.
Is either model open-weight?
Gemini 2.5 Flash: not marked open-weight in our records. Qwen3.5 Plus 2026-04-20: not marked open-weight in our records.
What would each cost for a support chatbot?
At 10,000 chats a day, 1,500 input and 300 output tokens each, 30 days, standard tier: about $360 a month for Gemini 2.5 Flash and $297 for Qwen3.5 Plus 2026-04-20. This is our calculation from the listed prices, not a quote.

About the two models

Gemini 2.5 Flash

By Google. $0.30 input and $2.50 output per 1M tokens, 1.05M context, atlas square D5. Tiers listed: batch, standard.

Full specs & pricing →

Qwen3.5 Plus 2026-04-20

By Qwen (Alibaba). $0.30 input and $1.80 output per 1M tokens, 1M context, atlas square D5. Tiers listed: standard.

Full specs & pricing →

Compare Qwen3.5 Plus 2026-04-20 with…

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