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Comparison

GPT 5 Codex vs Kimi K2.5

Side-by-side comparison of OpenAI GPT 5 Codex and Moonshot Kimi K2.5. Pricing, quality benchmarks, and context windows.

Quality Benchmarks

LiveBench / 0-100

Coding94 / 60Math94 / 85Reasoning94 / 74Language94 / 64

GPT 5 Codex

94.0Frontier

Kimi K2.5

70.8Frontier

GPT 5 Codex
Kimi K2.5

Input Price (per 1M)

$1.25
$0.4000
68% less

Output Price (per 1M)

$10.00
$1.90
81% less

Context Window

400K
1.5x
262.1K

Max Output

128K
262.1K
2.0x

OpenAI

GPT 5 Codex

vs

Moonshot

Kimi K2.5

Pricing per 1M Tokens

$1.25

Input

Input

$0.4000

68% cheaper

Input

$10.00

Output

Output

$1.90

81% cheaper

Output

Token Limits

Context

400K

Context

Context

262.1K

Max Output

128K

Max Output

Max Output

262.1K

VisionTools
VisionTools

GPT 5 Codex Details

$1.25 in / $10.00 out

Kimi K2.5 Details

$0.4000 in / $1.90 out

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More Comparisons

Top OpenAI pick

GPT 5 vs Kimi K2.5

$1.25/M in · Score 94

Top Moonshot pick

GPT 5 Codex vs Kimi K2.6

$0.6840/M in · Score 73.9

OpenAI

GPT 5 Image vs Kimi K2.5$10.00/MGPT 5 Chat vs Kimi K2.5$1.25/MGPT 5.4 vs Kimi K2.5$2.50/MGPT 5.5 vs Kimi K2.5$5.00/M

Moonshot

GPT 5 Codex vs Kimi K2$0.5700/MGPT 5 Codex vs Kimi K2 Thinking$0.6000/MGPT 5 Codex vs Kimi K2 0905$0.6000/M

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