Nova 2 Lite vs Gemini 3.5 Flash Lite vs Grok 4.20

Nova 2 Lite at $0.345 in and $2.88 out, Gemini 3.5 Flash Lite at $0.345 in and $2.88 out, and Grok 4.20 at $1.44 in and $2.88 out — per million tokens, from the same wallet.

Nova 2 Lite

Amazon

0.4¢

for a client proposal

$0.345 in · $2.88 out / 1M

1M context · released December 2025

Full page →

Gemini 3.5 Flash Lite

Google

0.4¢

for a client proposal

$0.345 in · $2.88 out / 1M

1.05M context · released 3 weeks ago

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 1.8¢ for a typical client proposal.

At a glance

Cheapest input: Nova 2 Lite at $0.345 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

Nova 2 Lite

0.21¢

Gemini 3.5 Flash Lite

0.21¢

Grok 4.20

0.43¢

Draft a client proposal from notes

5K in · 800 out

Nova 2 Lite

0.4¢

Gemini 3.5 Flash Lite

0.4¢

Grok 4.20

0.95¢

Context-heavy session (Alyph workspace)

155K in · 4K out

Nova 2 Lite

$0.06

Gemini 3.5 Flash Lite

$0.06

Grok 4.20

$0.23

Analyze a 50-page legal contract

35K in · 1K out

Nova 2 Lite

1.5¢

Gemini 3.5 Flash Lite

1.5¢

Grok 4.20

$0.05

Large architecture refactor

250K in · 3K out

Nova 2 Lite

$0.09

Gemini 3.5 Flash Lite

$0.09

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

Nova 2 Lite

Gemini 3.5 Flash Lite

Grok 4.20

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

Pricing

Nova 2 Lite

Gemini 3.5 Flash Lite

Grok 4.20

Input / 1M tokens

$0.345

$1.44

Output / 1M tokens

$2.88

Cached input / 1M

—

$0.035

$0.230

Web search

—

1.6¢ / search

0.57¢ / search

Specs

Nova 2 Lite

Gemini 3.5 Flash Lite

Grok 4.20

Provider

Amazon

Google

xAI

Released

December 2025

3 weeks ago

4 months ago

Context window

1.05M

Max output

66K

—

Input

Text, Images, Video, and Files

Text, Images, Video, Files, and Audio

Text, Images, and Files

Output

Text

Reasoning

Shows its thinking

Knowledge cutoff

—

2025-09-01

Try it with real numbers

2K tokens in · 500 tokens out.

Nova 2 Lite

Amazon

0.21¢

for this task

32% input · 68% output

Full pricing →

Gemini 3.5 Flash Lite

Google

0.21¢

for this task

32% input · 68% output

Full pricing →

Grok 4.20

xAI

0.43¢

for this task

67% input · 33% output

Full pricing →

All 3, same prompt and context: 0.86¢. That is the entire cost of the comparison.

Your $5 welcome credit covers about 583 of these.

Which should you pick?

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

On price, Nova 2 Lite is the cheapest of the three on a typical task, at about 0.4¢.

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 →

Nova 2 Lite pricing →Gemini 3.5 Flash Lite pricing →Grok 4.20 pricing →Try other combinations →

Questions, answered

Which is cheapest — Nova 2 Lite, Gemini 3.5 Flash Lite, or Grok 4.20?

On a typical client proposal (5K tokens in, 800 out): Nova 2 Lite at 0.4¢; Gemini 3.5 Flash Lite at 0.4¢; 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 Nova 2 Lite, Gemini 3.5 Flash Lite, 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 1.8¢ for a typical task.

Ask all three at once

Identical prompt, identical context, answers side by side — about 1.8¢ for a typical client proposal. Free to start, with $5 of credit.