Comparison

GPT 5 Codex vs GPT 5.4

Side-by-side comparison of OpenAI GPT 5 Codex and OpenAI GPT 5.4. Pricing, quality benchmarks, and context windows.

Quality Benchmarks

LiveBench / 0-100

GPT 5 Codex

92.1Frontier

GPT 5.4

83.1Frontier

GPT 5 Codex

GPT 5.4

Input Price (per 1M)

$1.25

50% less

$2.50

Output Price (per 1M)

$10.00

33% less

$15.00

Context Window

400K

1.1M

2.6x

Max Output

128K

OpenAI

GPT 5 Codex

OpenAI

GPT 5.4

Pricing per 1M Tokens

$1.25

50% cheaper

Input

$2.50

Input

$10.00

33% cheaper

Output

$15.00

Output

Token Limits

Context

400K

Context

1.1M

Max Output

128K

Max Output

128K

VisionTools

GPT 5 Codex Details

$1.25 in / $10.00 out

GPT 5.4 Details

$2.50 in / $15.00 out

More Comparisons

Top OpenAI pick

GPT 5 vs GPT 5.4

$1.25/M in · Score 92.1

Top OpenAI pick

GPT 5 Codex vs GPT 5 Codex

$1.25/M in · Score 92.1

OpenAI

GPT 5 Image vs GPT 5.4$10.00/M GPT 5 Chat vs GPT 5.4$1.25/M GPT 5.4 vs GPT 5.4$2.50/M GPT 4.1 vs GPT 5.4$2.00/M

OpenAI

GPT 5 Codex vs GPT 5$1.25/M GPT 5 Codex vs GPT 5 Image$10.00/M GPT 5 Codex vs GPT 5 Chat$1.25/M GPT 5 Codex vs GPT 4.1$2.00/M

Compare Models

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