Claude Opus 4.5 vs GPT-5.4: token pricing & cost compared (July 2026)

How Claude Opus 4.5 (Anthropic) and GPT-5.4 (OpenAI) actually compare on price — input, output, and total monthly cost at the MAU you care about. Updated against live OpenRouter pricing.

Anthropic

Claude Opus 4.5

Input: $5.00 / 1M tokens
Output: $25.00 / 1M tokens
Output / Input ratio: 5.0×
Context window: 200K

OpenAI

GPT-5.4

Input: $2.50 / 1M tokens
Output: $15.00 / 1M tokens
Output / Input ratio: 6.0×
Context window: 1,050K

The short answer

GPT-5.4 is cheaper across the board for typical workloads.

Token pricing side-by-side

Claude Opus 4.5
GPT-5.4

Cost at your usage

Avg input tokens / call

Avg output tokens / call

Calls per active user / day: 5

Active days / month: 20

MAU: 1,000

Claude Opus 4.5

Per call

$0.01500

Per user / mo

$1.5000

Total / mo

$1,500

GPT-5.4

Per call

$0.00875

Per user / mo

$0.8750

Total / mo

$875

GPT-5.4 is cheaper by $0.6250/user/month — a saving of $625/month at 1,000 MAU.

Total monthly bill across MAU

Claude Opus 4.5
GPT-5.4

Same usage profile applied to both models; only the per-token price differs.

Run this against your real numbers

The mini-calculator above is a preview. Use the full tools to model power-user blast radius, gross margin, and 12-month spend forecasts.

Other comparisons

GLM 5.2 vs GPT-5.4 GPT-5.5 vs GPT-5.4 GPT-5.4 vs GPT-5.2

Comparing Claude Opus 4.5 vs GPT-5.4 on price alone never tells the whole story — output-token weighting, context length, and your usage profile change the answer dramatically. Use the calculators below for the full picture.