GPT-5 Nano vs Qwen3.5-Flash

GPT-5 Nano at $0.058 in and $0.460 out and Qwen3.5-Flash at $0.075 in and $0.299 out — per million tokens, from the same wallet.

GPT-5 Nano

OpenAI

0.07¢

for a client proposal

$0.058 in · $0.460 out / 1M

400K context · released August 2025

Full page →

Qwen3.5-Flash

Qwen

0.06¢

for a client proposal

$0.075 in · $0.299 out / 1M

1M context · released 5 months ago

Full page →

Asking all both at once — identical prompt, identical context — costs about 0.13¢ for a typical client proposal.

At a glance

Cheapest input: GPT-5 Nano at $0.058 per million tokens.
Cheapest output: Qwen3.5-Flash at $0.299 per million tokens.
Largest context: Qwen3.5-Flash at 1M tokens — about 1,400 pages.

Cost per task

Estimated totals at the rates above. Solid bar is input, lighter bar is output.

Quick code fix

2K in · 500 out

GPT-5 Nano

0.03¢

Qwen3.5-Flash

0.03¢

Draft a client proposal from notes

5K in · 800 out

GPT-5 Nano

0.07¢

Qwen3.5-Flash

0.06¢

Context-heavy session (Alyph workspace)

155K in · 4K out

GPT-5 Nano

1.1¢

Qwen3.5-Flash

1.3¢

Analyze a 50-page legal contract

35K in · 1K out

GPT-5 Nano

0.25¢

Qwen3.5-Flash

0.29¢

Large architecture refactor

250K in · 3K out

GPT-5 Nano

1.6¢

Qwen3.5-Flash

2¢

Solid part of each bar is input tokens, the lighter part is output. Models that don’t fit a task are marked instead of priced.

Cost vs Token Amount

Drag the slider to adjust the split between input and output workload.

80% Input20% Output

GPT-5 Nano

Qwen3.5-Flash

Adjust the ratio slider to change how output tokens influence the final price for equivalent workloads.

Pricing

GPT-5 Nano

Qwen3.5-Flash

Input / 1M tokens

$0.058

$0.075

Output / 1M tokens

$0.460

$0.299

Cached input / 1M

$0.0057

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Web search

1.1¢ / search

—

Specs

GPT-5 Nano

Qwen3.5-Flash

Provider

OpenAI

Qwen

Released

August 2025

5 months ago

Context window

400K

Max output

128K

66K

Input

Text, Images, and Files

Text, Images, and Video

Output

Text

Reasoning

Shows its thinking

Knowledge cutoff

2024-05-31

—

Try it with real numbers

2K tokens in · 500 tokens out.

GPT-5 Nano

OpenAI

0.03¢

for this task

33% input · 67% output

Full pricing →

Qwen3.5-Flash

Qwen

0.03¢

for this task

50% input · 50% output

Full pricing →

All 2, same prompt and context: 0.06¢. That is the entire cost of the comparison.

Your $5 welcome credit covers about 7,763 of these.

Which should you pick?

For long documents, Qwen3.5-Flash has the largest context window here — 1M tokens.

On price, Qwen3.5-Flash is the cheapest of the two on a typical task, at about 0.06¢.

Or don’t pick. Send the identical prompt to all both, read the answers side by side, and keep the winner. How to run a fair bake-off →

GPT-5 Nano pricing →Qwen3.5-Flash pricing →Add Lyria 3 Clip Preview Add Grok 4.20

Questions, answered

Which is cheaper, GPT-5 Nano or Qwen3.5-Flash?

On a typical client proposal (5K tokens in, 800 out): Qwen3.5-Flash at 0.06¢; GPT-5 Nano at 0.07¢. Long prompts can change the order when long-context rates apply.

Which has the largest context window?

Qwen3.5-Flash — 1M tokens, about 1,400 pages.

Can I run GPT-5 Nano and Qwen3.5-Flash side by side on Alyph?

Yes — that is what Alyph is built for: the identical prompt with identical context to all 2, answers rendered side by side, billed from one wallet. This exact combination costs about 0.13¢ for a typical task.

Ask both at once

Identical prompt, identical context, answers side by side — about 0.13¢ for a typical client proposal. Free to start, with $5 of credit.