Claude Haiku 4.5 vs o3 Mini vs Grok 4.20

Claude Haiku 4.5 at $1.15 in and $5.75 out, o3 Mini at $1.26 in and $5.06 out, and Grok 4.20 at $1.44 in and $2.88 out — per million tokens, from the same wallet.

Claude Haiku 4.5

Anthropic

1¢

for a client proposal

$1.15 in · $5.75 out / 1M

200K context · released October 2025

Full page →

o3 Mini

OpenAI

1¢

for a client proposal

$1.26 in · $5.06 out / 1M

200K context · released January 2025

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 3¢ for a typical client proposal.

At a glance

Cheapest input: Claude Haiku 4.5 at $1.15 per million tokens.
Cheapest output: Grok 4.20 at $2.88 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

Claude Haiku 4.5

0.52¢

o3 Mini

0.51¢

Grok 4.20

0.43¢

Draft a client proposal from notes

5K in · 800 out

Claude Haiku 4.5

1¢

o3 Mini

1¢

Grok 4.20

0.95¢

Context-heavy session (Alyph workspace)

155K in · 4K out

Claude Haiku 4.5

$0.20

o3 Mini

$0.22

Grok 4.20

$0.23

Analyze a 50-page legal contract

35K in · 1K out

Claude Haiku 4.5

4.6¢

o3 Mini

4.9¢

Grok 4.20

$0.05

Large architecture refactor

250K in · 3K out

Claude Haiku 4.5

needs 250K ctx

o3 Mini

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

Claude Haiku 4.5

o3 Mini

Grok 4.20

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

Pricing

Claude Haiku 4.5

o3 Mini

Grok 4.20

Input / 1M tokens

$1.15

$1.26

$1.44

Output / 1M tokens

$5.75

$5.06

$2.88

Cached input / 1M

$0.115

$0.632

$0.230

Web search

1.1¢ / search

0.57¢ / search

Specs

Claude Haiku 4.5

o3 Mini

Grok 4.20

Provider

Anthropic

OpenAI

xAI

Released

October 2025

January 2025

4 months ago

Context window

200K

Max output

64K

100K

—

Input

Text, Images, and Files

Text and Files

Text, Images, and Files

Output

Text

Reasoning

Shows its thinking

Knowledge cutoff

—

2023-10-31

2025-09-01

Try it with real numbers

2K tokens in · 500 tokens out.

Claude Haiku 4.5

Anthropic

0.52¢

for this task

44% input · 56% output

Full pricing →

o3 Mini

OpenAI

0.51¢

for this task

50% input · 50% output

Full pricing →

Grok 4.20

xAI

0.43¢

for this task

67% input · 33% output

Full pricing →

All 3, same prompt and context: 1.5¢. That is the entire cost of the comparison.

Your $5 welcome credit covers about 343 of these.

Which should you pick?

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

On price, Grok 4.20 is the cheapest of the three on a typical task, at about 0.95¢.

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 →

Claude Haiku 4.5 pricing →o3 Mini pricing →Grok 4.20 pricing →Try other combinations →

Questions, answered

Which is cheapest — Claude Haiku 4.5, o3 Mini, or Grok 4.20?

On a typical client proposal (5K tokens in, 800 out): Grok 4.20 at 0.95¢; Claude Haiku 4.5 at 1¢; o3 Mini at 1¢. 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 Claude Haiku 4.5, o3 Mini, 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 3¢ for a typical task.

Ask all three at once

Identical prompt, identical context, answers side by side — about 3¢ for a typical client proposal. Free to start, with $5 of credit.