Seed 1.6 vs ReMM SLERP 13B vs Grok 4.20

Seed 1.6 at $0.287 in and $2.30 out, ReMM SLERP 13B at $0.517 in and $0.748 out, and Grok 4.20 at $1.44 in and $2.88 out — per million tokens, from the same wallet.

Seed 1.6

ByteDance Seed

0.33¢

for a client proposal

$0.287 in · $2.30 out / 1M

262K context · released December 2025

Full page →

ReMM SLERP 13B

Undi95

0.32¢

for a client proposal

$0.517 in · $0.748 out / 1M

6K context · released July 2023

Full page →

Grok 4.20

xAI

0.95¢

for a client proposal

$1.44 in · $2.88 out / 1M

2M context · released 4 months ago

Full page →

Asking all three at once — identical prompt, identical context — costs about 1.6¢ for a typical client proposal.

At a glance

Cheapest input: Seed 1.6 at $0.287 per million tokens.
Cheapest output: ReMM SLERP 13B at $0.748 per million tokens.
Largest context: Grok 4.20 at 2M tokens — about 2,900 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

Seed 1.6

0.17¢

ReMM SLERP 13B

0.14¢

Grok 4.20

0.43¢

Draft a client proposal from notes

5K in · 800 out

Seed 1.6

0.33¢

ReMM SLERP 13B

0.32¢

Grok 4.20

0.95¢

Context-heavy session (Alyph workspace)

155K in · 4K out

Seed 1.6

$0.11

ReMM SLERP 13B

needs 155K ctx

Grok 4.20

$0.23

Long-context rate applied at this input size.

Analyze a 50-page legal contract

35K in · 1K out

Seed 1.6

1.2¢

ReMM SLERP 13B

needs 35K ctx

Grok 4.20

$0.05

Large architecture refactor

250K in · 3K out

Seed 1.6

$0.16

ReMM SLERP 13B

needs 250K ctx

Grok 4.20

$0.74

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

ReMM SLERP 13B

Grok 4.20

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

Pricing

Seed 1.6

ReMM SLERP 13B

Grok 4.20

Input / 1M tokens

$0.287

$0.517

$1.44

Output / 1M tokens

$2.30

$0.748

$2.88

Cached input / 1M

—

$0.230

Web search

—

0.57¢ / search

Specs

Seed 1.6

ReMM SLERP 13B

Grok 4.20

Provider

ByteDance Seed

Undi95

xAI

Released

December 2025

July 2023

4 months ago

Context window

262K

Max output

33K

—

Input

Images, Text, and Video

Text

Text, Images, and Files

Output

Text

Reasoning

Shows its thinking

Answers directly

Shows its thinking

Knowledge cutoff

—

2023-06-30

2025-09-01

Try it with real numbers

2K tokens in · 500 tokens out.

Seed 1.6

ByteDance Seed

0.17¢

for this task

33% input · 67% output

Full pricing →

ReMM SLERP 13B

Undi95

0.14¢

for this task

73% input · 27% output

Full pricing →

Grok 4.20

xAI

0.43¢

for this task

67% input · 33% output

Full pricing →

All 3, same prompt and context: 0.74¢. That is the entire cost of the comparison.

Your $5 welcome credit covers about 671 of these.

Which should you pick?

For long documents, Grok 4.20 has the largest context window here — 2M tokens.

On price, ReMM SLERP 13B is the cheapest of the three on a typical task, at about 0.32¢.

For images or files, Seed 1.6 and Grok 4.20 can read them directly; ReMM SLERP 13B is text-only.

If you want to watch the model think, Seed 1.6 and Grok 4.20 show reasoning; the other answers directly.

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

Seed 1.6 pricing →ReMM SLERP 13B pricing →Grok 4.20 pricing →Try other combinations →

Questions, answered

Which is cheapest — Seed 1.6, ReMM SLERP 13B, or Grok 4.20?

On a typical client proposal (5K tokens in, 800 out): ReMM SLERP 13B at 0.32¢; Seed 1.6 at 0.33¢; Grok 4.20 at 0.95¢. Long prompts can change the order when long-context rates apply.

Which has the largest context window?

Grok 4.20 — 2M tokens, about 2,900 pages.

Can I run Seed 1.6, ReMM SLERP 13B, and Grok 4.20 side by side on Alyph?

Yes — that is what Alyph is built for: the identical prompt with identical context to all 3, answers rendered side by side, billed from one wallet. This exact combination costs about 1.6¢ for a typical task.

Ask all three at once

Identical prompt, identical context, answers side by side — about 1.6¢ for a typical client proposal. Free to start, with $5 of credit.