Seed 1.6 Flash vs Qwen3.5-9B

Seed 1.6 Flash at $0.086 in and $0.345 out and Qwen3.5-9B at $0.115 in and $0.172 out — per million tokens, from the same wallet.

Seed 1.6 Flash

ByteDance Seed

0.07¢

for a client proposal

$0.086 in · $0.345 out / 1M

262K context · released December 2025

Full page →

Qwen3.5-9B

Qwen

0.07¢

for a client proposal

$0.115 in · $0.172 out / 1M

262K context · released 5 months ago

Full page →

Asking all both at once — identical prompt, identical context — costs about 0.14¢ for a typical client proposal.

At a glance

Cheapest input: Seed 1.6 Flash at $0.086 per million tokens.
Cheapest output: Qwen3.5-9B at $0.172 per million tokens.
Identical context windows: 262K tokens each.

Cost per task

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

Quick code fix

2K in · 500 out

Seed 1.6 Flash

0.03¢

Qwen3.5-9B

0.03¢

Draft a client proposal from notes

5K in · 800 out

Seed 1.6 Flash

0.07¢

Qwen3.5-9B

0.07¢

Context-heavy session (Alyph workspace)

155K in · 4K out

Seed 1.6 Flash

2.2¢

Qwen3.5-9B

1.9¢

Long-context rate applied at this input size.

Analyze a 50-page legal contract

35K in · 1K out

Seed 1.6 Flash

0.34¢

Qwen3.5-9B

0.42¢

Large architecture refactor

250K in · 3K out

Seed 1.6 Flash

3.2¢

Qwen3.5-9B

2.9¢

Long-context rate applied at this input size.

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

Seed 1.6 Flash

Qwen3.5-9B

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

Pricing

Seed 1.6 Flash

Qwen3.5-9B

Input / 1M tokens

$0.086

$0.115

Output / 1M tokens

$0.345

$0.172

Specs

Seed 1.6 Flash

Qwen3.5-9B

Provider

ByteDance Seed

Qwen

Released

December 2025

5 months ago

Context window

262K

Max output

33K

262K

Input

Images, Text, and Video

Text, Images, and Video

Output

Text

Reasoning

Shows its thinking

Knowledge cutoff

—

Try it with real numbers

2K tokens in · 500 tokens out.

Seed 1.6 Flash

ByteDance Seed

0.03¢

for this task

50% input · 50% output

Full pricing →

Qwen3.5-9B

Qwen

0.03¢

for this task

73% input · 27% output

Full pricing →

All 2, same prompt and context: 0.07¢. That is the entire cost of the comparison.

Your $5 welcome credit covers about 7,561 of these.

Which should you pick?

On price, Seed 1.6 Flash is the cheapest of the two on a typical task, at about 0.07¢.

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 →

Seed 1.6 Flash pricing →Qwen3.5-9B pricing →Add Lyria 3 Clip Preview Add Grok 4.20

Questions, answered

Which is cheaper, Seed 1.6 Flash or Qwen3.5-9B?

On a typical client proposal (5K tokens in, 800 out): Seed 1.6 Flash at 0.07¢; Qwen3.5-9B at 0.07¢. Long prompts can change the order when long-context rates apply.

Which has the largest context window?

They are identical — 262K tokens each, about 370 pages.

Can I run Seed 1.6 Flash and Qwen3.5-9B 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 0.14¢ for a typical task.

Ask both at once

Identical prompt, identical context, answers side by side — about 0.14¢ for a typical client proposal. Free to start, with $5 of credit.