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Comparison

GPT 5.2 Codex vs GPT 5 Chat

Side-by-side comparison of OpenAI GPT 5.2 Codex and OpenAI GPT 5 Chat. Pricing, quality benchmarks, and context windows.

Quality Benchmarks

LiveBench / 0-100

Coding61 / 85Math93 / 85Reasoning88 / 85Language68 / 85

GPT 5.2 Codex

77.8Frontier

GPT 5 Chat

85.1Frontier

GPT 5.2 Codex
GPT 5 Chat

Input Price (per 1M)

$1.75
$1.25
29% less

Output Price (per 1M)

$14.00
$10.00
29% less

Context Window

400K
3.1x
128K

Max Output

128K
7.8x
16.4K

OpenAI

GPT 5.2 Codex

vs

OpenAI

GPT 5 Chat

Pricing per 1M Tokens

$1.75

Input

Input

$1.25

29% cheaper

Input

$14.00

Output

Output

$10.00

29% cheaper

Output

Token Limits

Context

400K

Context

Context

128K

Max Output

128K

Max Output

Max Output

16.4K

VisionTools
Vision

GPT 5.2 Codex Details

$1.75 in / $14.00 out

GPT 5 Chat Details

$1.25 in / $10.00 out

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