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Comparison

GPT 5.2 Codex vs Claude Opus 4.8 Fast

Side-by-side comparison of OpenAI GPT 5.2 Codex and Anthropic Claude Opus 4.8 Fast. Pricing, quality benchmarks, and context windows.

Quality Benchmarks

LiveBench / 0-100

Coding61 / 68Math93 / 95Reasoning88 / 93Language68 / 71

GPT 5.2 Codex

77.8Frontier

Claude Opus 4.8 Fast

81.8Frontier

GPT 5.2 Codex
Claude Opus 4.8 Fast

Input Price (per 1M)

$1.75
83% less
$10.00

Output Price (per 1M)

$14.00
72% less
$50.00

Context Window

400K
1M
2.5x

Max Output

128K
128K

OpenAI

GPT 5.2 Codex

vs

Anthropic

Claude Opus 4.8 Fast

Pricing per 1M Tokens

$1.75

83% cheaper

Input

Input

$10.00

Input

$14.00

72% cheaper

Output

Output

$50.00

Output

Token Limits

Context

400K

Context

Context

1M

Max Output

128K

Max Output

Max Output

128K

VisionTools
VisionTools

GPT 5.2 Codex Details

$1.75 in / $14.00 out

Claude Opus 4.8 Fast Details

$10.00 in / $50.00 out

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