Claude Opus 4.7 (Fast) vs GPT-5.4 Pro

Claude Opus 4.7 (Fast) at $34.50 in and $172.50 out and GPT-5.4 Pro at $34.50 in and $207.00 out — per million tokens, from the same wallet.

Claude Opus 4.7 (Fast)

Anthropic

$0.31

for a client proposal

$34.50 in · $172.50 out / 1M

1M context · released 3 months ago

Full page →

GPT-5.4 Pro

OpenAI

$0.34

for a client proposal

$34.50 in · $207.00 out / 1M

1.05M context · released 5 months ago

Full page →

Asking all both at once — identical prompt, identical context — costs about $0.65 for a typical client proposal.

At a glance

All 2 cost the same on input.
Cheapest output: Claude Opus 4.7 (Fast) at $172.50 per million tokens.
Largest context: GPT-5.4 Pro at 1.05M tokens — about 1,500 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 Opus 4.7 (Fast)

$0.16

GPT-5.4 Pro

$0.17

Draft a client proposal from notes

5K in · 800 out

Claude Opus 4.7 (Fast)

$0.31

GPT-5.4 Pro

$0.34

Context-heavy session (Alyph workspace)

155K in · 4K out

Claude Opus 4.7 (Fast)

$6.04

GPT-5.4 Pro

$6.18

Analyze a 50-page legal contract

35K in · 1K out

Claude Opus 4.7 (Fast)

$1.38

GPT-5.4 Pro

$1.41

Large architecture refactor

250K in · 3K out

Claude Opus 4.7 (Fast)

$9.14

GPT-5.4 Pro

$9.25

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 Opus 4.7 (Fast)

GPT-5.4 Pro

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

Pricing

Claude Opus 4.7 (Fast)

GPT-5.4 Pro

Input / 1M tokens

$34.50

Output / 1M tokens

$172.50

$207.00

Cached input / 1M

$3.45

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Web search

1.1¢ / search

Specs

Claude Opus 4.7 (Fast)

GPT-5.4 Pro

Provider

Anthropic

OpenAI

Released

3 months ago

5 months ago

Context window

1.05M

Max output

128K

Input

Text, Images, and Files

Output

Text

Reasoning

Shows its thinking

Knowledge cutoff

—

Try it with real numbers

2K tokens in · 500 tokens out.

Claude Opus 4.7 (Fast)

Anthropic

$0.16

for this task

44% input · 56% output

Full pricing →

GPT-5.4 Pro

OpenAI

$0.17

for this task

40% input · 60% output

Full pricing →

All 2, same prompt and context: $0.33. That is the entire cost of the comparison.

Your $5 welcome credit covers about 15 of these.

Which should you pick?

For long documents, GPT-5.4 Pro has the largest context window here — 1.05M tokens.

On price, Claude Opus 4.7 (Fast) is the cheapest of the two on a typical task, at about $0.31.

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 →

Claude Opus 4.7 (Fast) pricing →GPT-5.4 Pro pricing →Add Lyria 3 Clip Preview Add Grok 4.20

Questions, answered

Which is cheaper, Claude Opus 4.7 (Fast) or GPT-5.4 Pro?

On a typical client proposal (5K tokens in, 800 out): Claude Opus 4.7 (Fast) at $0.31; GPT-5.4 Pro at $0.34. Long prompts can change the order when long-context rates apply.

Which has the largest context window?

GPT-5.4 Pro — 1.05M tokens, about 1,500 pages.

Can I run Claude Opus 4.7 (Fast) and GPT-5.4 Pro 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 $0.65 for a typical task.

Ask both at once

Identical prompt, identical context, answers side by side — about $0.65 for a typical client proposal. Free to start, with $5 of credit.